Products and Equipment from Rel-Tek Corporation

Rel-Tek - Model 501B - Section Alarm

Developed for hazardous areas of coal mines for alerting workers of possible hazardous conditions (fires, explosive/toxic fumes, etc.), the SA-501 is small and portable, yet effective and safe. Ideal for mines or plant areas where space is confined. All solid state; MSHA classified intrinsically safe when powered through proper barriers. The SA-501B, has two separate outputs: 1) a visual "warning" and 2) a strident sonic "alarm", each independently ...

Rel-Tek - Model RA1000 - Remote Alarm

The Remote Alarm provides a visual and audible indication of a plant ...

Rel-Tek - Model RA 1000/DX - Remote Alarms With Telemetry

Remote Alarm-1000/DX is a remote alarm with telemetry capabilities. These capabilities are achieved by placing one of our telemetry cards inside a larger alarm enclosure. Cards used are limited by the need for at least one digital output. These units are used when there is a need for addition analog inputs and digital outputs and were there is DC power available but no AC power is ...

Rel-Tek - Model RA 1000 SM - Extremely Loud Remote Alarm

Remote Alarm-1000SM is an extremely loud alarm of 105dBA@ 10'. The enclosure and strobe are the same ones used on the ...

Rel-Tek - Model 1000 - Dual Remote Alarm

The Remote Alarm-1000/Dual allows you the opportunity to alarm three different thresholds from one unit. With several different color strobes available you can customize your alarm. Audio alarm is 105dBA@ 2 ...

Rel-Tek - Model SA - Dual Separate Alarms

This unit is MSHA classified for methane, with three separate alarms; this allows three thresholds to be alarmed from one point. MSHA requires that each function be wired separately from each ...

Rel-Tek - Model 1000 - Section Alarm

Developed for hazardous areas of coal mines for alerting workers of possible hazardous conditions (fires, explosive/toxic fumes, etc.), the SA-501 is small and portable, yet effective and safe. Ideal for mines or plant areas where space is confined. All solid state; MSHA classified intrinsically safe when powered through proper barriers. The SA-501B, has two separate outputs: 1) a visual "warning" and 2) a strident sonic "alarm", each independently ...

Rel-Tek - Model 500 - Sentinel UPS Units

Sentinel*500™ UPS Units give up to 20 minutes of backup power to your computer system. This "smart" UPS will sense low battery power and shuts down the software and hardware in the proper manner. When power is restored the UPS will automatically bring up the hardware and software to the previous ...

BlueBaby - Model 5.7210/5.7220/5.7230/5.7240 - Universal Outstation

Product 5.7210/5.7220/5.7230/5.7240 BlueBaby; BB1, BB2, BB3, BB4, BB5, BB6, BB7 & BB8. Universal BLUE outstations with US/MSHA credentials for monitoring classified sensors and devices in hazardous (CH4) areas. Directly compatible with most monitoring systems used in U.S. coal Mines. BBs contain barriers and regulator, capable of servicing classified CO, CH4, O2, temp, RH, pressure, airflow and vibration sensors, as well as classified relays and ...

Kal-Kit & KalGas - Convenient Portable Calibration Kit

The Kal-Kit is a convenient portable calibration kit containing everything needed to calibrate Rel-Tek (and most other) gas sensors. It contains two 20-liter tanks of cal gas, usually zero and a selected span gas. Tanks are nested in a shock resistant bed, rigidly captured by a brace and wing nut. Brass needle valves control the gas flow from either tank. A bead type flow meter indicates the flow in ml/min. Two pressure gages show the pressure in each ...

Rel-Tek - Model Type SG, SH and SL - Intrinsic Safety Barrier

Type SG, SH and SL Dual-Channel Intrinsic Safety Barriers -- Probably the most compact and highest powered I.S. barriers you will find anywhere. With a footprint measuring just 4.5 x 3/4" it occupies a mere 1.7 sq-in of enclosure real estate per channel. Entity approved to UL-913 for Class 1, Div 1 and 2, Group D. Also MSHA approved intrinsically safe (I.S.), carrying both IA certifications and "G/H/L" letter classifications for US mining, plus an "L" ...

Rel-Tek - Model 7.3100 - Digital Display Panel Meter

Parameters: Digital Display Panel Meter, 3 1/2 digit LCD, 4-20ma input. The Digital Display Panel Meter provides remote indication of a sensor's ...

CRSR - Model 101 - Current Regulators

Parameters: Current Regulators and Signal Regenerators switchable 4-20ma or 1-5VDC output. The CRSR-101 is essential whenever I.S. barriers are used for powering and monitoring sensors in hazardous areas. The device performs important functions critical to the successful installation of sensors in hazardous areas. Often, when setting up a sensor powered through an I.S. barrier, the sensor is starved for voltage? And, tedious replacement and re-scaling ...

Rel-Tek - Outstations and I/O Boxes

Outstations and I/O Boxes are a collection of I/O cards, power supplies and special accessories that allow you to accomplish your mission effectively. Along with several standard versions (DXcalibar, RMcalibar, Red Outstation) there are also a type of "ala cart menu" of optional styles and equipment. Some of the options can be enclosure size, power supply size or I/O ...

DXcalibar - Model 4.512x - Field Monitoring Automatic Calibration and Barrier Box

The DXcalibar is a compact, integrated, field monitoring and communication box that replaces the familiar, but burdensome multi-box alternative. Developed especially for managing large numbers of sensors throughout extensive buildings and facilities, this innovative product saves serious time and money, while improving performance, reliability and ...

Rel-Tek - Model DX-0008 Series - Input Output Card

Analog Inputs:0. Digital Inputs: 0. Analog Outputs:0. Digital Outputs: 8. Available in the FT ...

Rel-Tek - Model DX-0008R High Current - Input Output Card

Analog Inputs:0. Digital Inputs: 0. Analog Outputs:0. Digital Outputs: 8. Available in the FT ...

Rel-Tek - Model DX-0020 - Input Output Card

Analog Inputs: 0. Digital Inputs: 0. Analog Outputs: 2. Digital Outputs: ...

Rel-Tek - Model DX-0080 - Input Output Card

Analog Inputs: 0. Digital Inputs: 0. Analog Outputs: 8. Digital Outputs: 0. Available in the new FT ...

Rel-Tek - Model DX-0100 - Input Output Card

Analog Inputs: 0. Digital Inputs: 1. Analog Outputs: 0. Digital Outputs: 0. Available in thenew FT ...

Rel-Tek - Model DX-0800 Series - Input Output Card

Analog Inputs:0. Digital Inputs: 8. Analog Outputs:0. Digital Outputs: 0. Available in the FT ...

Rel-Tek - Model DX-1000 - Input Output Card

Analog Inputs: 1. Digital Inputs: 0. Analog Outputs: 0. Digital Outputs: 0. Available in the new FT ...

Rel-Tek - Model DX-2202 Series - Input Output Card

Analog Inputs:2. Digital Inputs:2. Analog Outputs:0. Digital Outputs:2. Available in the FT ...

Rel-Tek - Model DX-4404 Series - Input Output Card

Analog Inputs:4. Digital Inputs:4. Analog Outputs:0. Digital Outputs:4. Available in the FT ...

Rel-Tek - Model DX-8000 Series - Input Output Card

Analog Inputs:8. Digital Inputs: 0. Analog Outputs:0. Digital Outputs: 0. Available in the FT ...

Rel-Tek - Model DX-8814 Series - Input Output Card

Analog Inputs: 8. Digital Inputs: 8. Analog Outputs: 1. Digital Outputs: 4. Available in the new FT ...

Rel-Tek - Model DX8080 - Input Output Card

Analog Inputs: 8. Digital Inputs: 0. Analog Outputs: 8. Digital Outputs: 0. Available in the new FT ...

FireBoss - Model 100 - Carbon Monoxide Sensor

FireBoss*100 Carbon Monoxide Sensor - All CO sensors are not alike. The FireBoss toxic 0-25-100-500 ppm CO sensor line has been re-designed and enhanced over a period of two decades of underground mining use, and has evolved as a tough, dependable product with exceptionally long-term stability. Others are often plagued with temperature problems and short life expectancy. We frequently observe sensors still working on their first electrochemical cell ...

OxyBoss - Model 100 - Oxygen Sensor

Oxygen Sensor -- The OxyBoss*100 is a long life product. The cell is guaranteed for one year. Rel-Tek has been manufacturing oxygen sensors for over a decade, and we've learned a lot about making sensors last longer. And, with an initial price comparable to competing "flash-bulb" O2 products, the cost of ownership of the high quality OxyBoss*100, including on-going maintenance, is a lot less. Range is 0-25% O2; uses 10-30VDC, 4-20ma, 2-wire hookup; ...

GasBoss - Model 100 - Combustible Gas Sensor

GasBoss*100 Combustible Gas Sensor -- All combustible gas sensors aren't equal. There are big differences that rarely get mentioned. Our quality catalytic bead sensors last for years, often 5-10 or more, before a head needs to be replaced. Most of our competitors' last a year, maybe two. And, our GasBoss*100 sensors are low current so are approved intrinsically safe (I.S.) not explosion proof (X/P). Competitors' old fashioned high-current sensors are ...

AirBoss - Model 200W - Microprocessor-Based, Linear Air Velocity Sensor

AirBoss 200W Air Velocity Sensor - The AirBoss*200W is a microprocessor-based, linear air velocity sensor with a range of 0-2000 fpm. Quality constructed of plastic and SS to perform in dusty and corrosive underground nuclear waste storage sites, this is a serious product that has no moving parts and is easy to use. Power is from 14-30VDC, 130ma max, three wire hookup. It has a linear 4-20ma output and is classified intrinsically safe in methane ...

GasBoss - Model 1100 - Combustible Gas Sensors

The GasBoss*1100 is a breakthrough in economy and performance. A third the cost of others with similar specs, this unit is designed to serve industry and commercial businesses where budgets are tight and maintenance is minimal. This self contained unit houses an optical infrared source and solid state absorption analyzer, the electronics for providing 4-20mA and 0-1VDC analog outputs, plus a 110VAC power supply, two SPDT individually settable trip ...

HotBoss - Versatile, Multi-Range Temperature Transmitter

The HotBoss*100 is a versatile, multi-range temperature transmitter. Operating from 10-30VDC, this unit generates a 4-20mA analog signal proportional to the probe temperature, over the designated range. Probes are available in three forms, 1) ambient air, 2) flat, copper, bolt-down contact for bolting to pillow block or motor mount and 3) tubular, SS with 1/4" NPT bushing for replacing a grease fitting on a gear box. For ambient monitoring under 60C ...

WetBoss - Relative Humidity Sensor

WetBoss Relative Humidity Sensor - Sensing humidity may seem easy, reflecting back on the original horsehairs and the like, but indeed, precise monitoring of RH is anything but easy. There is a fair amount of snake-oil in the industry, i.e. specs boasting of 0-100% ranges, knowing full well that the very low and very high ends are only estimates, and shrouded by the 5% FS ...

MultiBoss - Model DP - Differential Pressure Transducer

Whether you are monitoring inches of water or psi, the MultiBoss/DP does the job. Select a sensing head from one of six available ranges to suit your needs. Absolute, gage or differential pressure-- just specify the type. Powered from 12-30VDC, 4-20ma linear signal, 3-wire hookup, 35ma max current drain. Optional digital meter continuously displays the reading in 1/2" high, easy to read characters. Housed in a 6x6x4" steel, wall mount enclosure, it has ...

SmokeBoss - Ambient Smoke Monitor

Responds to optical obscuration of air due to smoke particles. Has a 4-20ma, linear output over the 0-10% optical density (OD) range. Powered from 10-30VDC, three wire hookup, draws about 50ma max. Proven in nasty environments, this product is MSHA classified for hazardous methane areas of underground coal mines. The US-Patented design minimizes effects of dust and moisture, while allowing easy field cleaning and recalibration using a built-in optical ...

VibraBoss - Model 100 - Vibration Sensor

A robust, versatile vibration sensor for continuous monitoring of rotating equipment such as large motors, fans, conveyors, etc. Simple to install and monitor; 2-wire hookup, 10-30VDC supply, signal powered, 4-20mA analog output proportional to average vibration velocity, or optionally, displacement. Designed for monitoring equipment with rotational speeds between 200 and 2000 RPM. For rotor speeds less than 500 rpm, "displacement" is generally more ...

ToxiBoss - Toxic Gas Sensor

ToxiBoss is a wall mounted gas sensor with interchangeable sensing heads to cover a wide variety of toxic gas situations. It is approved intrinsically safe for hydrogen (Group B) environments. Its Class I, Div 1 and 2, Group BCD approval means that it may be used in any hazardous gas environment, except acetylene. And, being intrinsically safe, it can be serviced in place without having to disconnect power or to undertake a costly declassification of ...

SafeBoss - Gas Monitoring and Alarm Systems

Rel-Tek has pioneered in gas detection for the alt-fuel transit industry since the inception of CNG buses over a decade ago. Rel-Tek drew on its quarter-century of pioneering product development, experience and know-how from monitoring underground mines to tackle the dynamic alt-fuel transit industry. We continue to maintain that leadership role with the introduction of the SafeBoss sensor/alarm product line. Our new SafeBoss monitoring and alarm ...

Spot-Fire - UV Flame Detector

The “Spot-Fire” was developed for detecting flames from early stage fires. It’s a survey instrument that reacts to flames over a wide area of property and distance. The flame detection design standard is to detect a blaze from a one sq ft pan of gasoline at a distance of 300 feet. Our engineers optimized the physical, optical and software parameters and came up with technology that is far more sensitive. Indeed, the SpotFire can ...

RPMBoss - Electronic Tachometer

Integrated electronics module and probe for idler or shaft monitoring: Easy installation, rugged, accurate, ...

CO2Boss - Industrial Carbon Dioxide Sensors

The CO2Boss/I is proven product, representing many generations of enhanced circuitry, simplified hardware and maintenance, and extended useful life. The 4-20mA analog output signal is standard. The electronics is modularized and potted to make it impervious to moisture and dust and is housed in a fiberglass enclosure. This three wire sensor consist of a + power a 4-20mA signal and a common. An LED current indicator provides a visible indication of ...

CO2Boss - Commercial Carbon Dioxide Sensor

The CO2Boss/C includes a digital meter: the 4 digits cover the standard range of 0-5000 ppm, as well as other custom ranges. The 4-20mA analog output signal is standard. The electronics is modularized and potted to make it impervious to moisture and dust and is housed in an ABS enclosure. This three wire sensor consist of a + power a 4-20mA signal and a common. An LED current indicator provides a visible indication of power and signal. The operating ...

CO2Boss - Economy Carbon Dioxide Sensor

The CO2Boss/E is a “No Frills” version of the CO2Boss/C. With no meter and its compact size (6” x 4” x 1.5”) allows it to fit nearly anywhere. The 4-20mA analog output signal is standard. The electronics is modularized and potted to make it impervious to moisture and dust and is housed in an ABS enclosure. This three wire sensor consist of a + power a 4-20mA signal and a common. An LED current indicator provides a visible ...

CO2Boss - High Concentration Carbon Dioxide Sensor

The CO2Boss/HC is higher concentration version of the CO2Boss/I. Not only does it have a higher range it is also classified for use in mines when connected to a matching letter class barrier. Barriers are available from Rel-Tek. The 4-20mA analog output signal is standard. The electronics is modularized and potted to make it impervious to moisture and dust and is housed in a fiberglass enclosure. This three wire sensor consist of a + power a 4-20mA ...

CO2Boss - Model 1100 1 - Carbon Dioxide Sensor

This self contained unit houses an optical infrared source and solid state absorption analyzer, the electronics generate 4-20mA and 0-1VDC analog outputs plus a 110VAC power supply, two SPDT individually settable trip relays, a meter and a pump… all packaged in a 10x8x4 painted steel enclosure or a 10x7x7” (254x178x178mm) dust/water proof fiberglass enclosure. Weight is about 6 pounds (2.7kg). Ranges available: 0-1-2-10-20-25-45% ...

CO2Boss - Model 1100 2 - Carbon Dioxide Sensor

This self contained unit houses an optical infrared source and solid state absorption analyzer, the electronics generate 4-20mA and 0-1VDC analog outputs plus a 110VAC power supply, two SPDT individually settable trip relays, a meter and a pump… all packaged in a 10x8x4 painted steel enclosure or a 10x7x7” (254x178x178mm) dust/water proof fiberglass enclosure. Weight is about 6 pounds (2.7kg). Ranges available: 0-1-2-10-20-25-45% ...

CO2Boss - Explosion Proof Carbon Dioxide Sensor

This self contained unit houses an optical infrared source and solid state absorption analyzer, the electronics generate 4-20mA and 0-1VDC analog outputs plus a 110VAC power supply, two SPDT individually settable trip relays, a meter and a pump… all packaged in a 10x8x4 painted steel enclosure or a 10x7x7” (254x178x178mm) dust/water proof fiberglass enclosure. Weight is about 6 pounds (2.7kg). Ranges available: 0-1-2-10-20-25-45% ...

MultiGas - Leak Detection System

Alternative-Fueled Vehicle: Leak Detection System: Four combustible gas sensors are installed at potential fuel gas leakage sites on a bus or truck (engine, fuel tanks, piping/valving, cabin) to detect high levels of potentially explosive fuel gas. A compact cab-mounted operator display (4.25” x 3” x 1.4”) monitors the four sensors, and alarms if any sensor reaches an alarm threshold. The wide spectrum sensors respond properly to ...

SafeBoss - Model CTRL-FA and SafeBoss-CTRL-IS - Stand-Alone Controllers

This SafeBoss trademark designates our line of stand-alone controllers. Using one of our RM420i control modules, this handy wall mount unit is AC powered and has everyth8ng necessary for monitoring one 4-20 ma analog signal, whether from a gas sensor, air velocity sensor or whatever. The RM420i receives the signal and displays the value on its LCD display. There are two user settable trip points, with two threshold relays. Two DPDT ...

SafeBoss - Model ePC - Controller

Replacing the single sensor RM420i module with an embedded PC adds extra monitoring power to the SafeBoss product line. Employing the robust Linux operating system, this modest controller becomes a power house of monitoring capability, handling a few sensors or a thousand. Expansion is modular, by connecting up to 50 remote, 16-sensor I/O panels to the SafeBoss-ePC controller via the DX-bus high-speed data highway. This also adds a 7 or ...

GasBoss/H2 - For Fuel-Cell Apps

Hydrogen fuel is a highly explosive NEC-Class I, Div 1, Group B rated gas and requires NEC-Group B approved gas sensors to monitor hydrogen buildup due to leakage. Many Group B hydrogen sensors are approved as Explosion Proof (XP), requiring either shut down of the gas detection systems or removal of all gas storage tanks and hydrogen fueled vehicles from the facility before performing sensor maintenance or replacement. This is a costly and ...

Rel-Tek - Model MagiKal - Automatic Sensor

Another even large cost savings is Rel-Tek’s MagiKal, our signature automatic sensor calibration utility that it supplies with all of its gas detection systems. No more ladders and lifts placing technical personnel in danger, and no more costly portable calibration gas tanks and dispensing apparatus to buy. The previously costly and troublesome manual calibration is passé. Cal-gas is now supplied from large 10” dia x 5’ ...

SpotFire - Super-Sensitive Flame Detector

This super-sensitive flame detector was developed for handling fire detection on conveyors belts in mines, as well as on and around oil/gas well above ground. One SpotFire can detect a 1 sq ft flame at 300 ft distance, thus covering up to 600 ft of mine conveyor belt or 2.5 acres of surface property. The technology is optical, so the response is instantaneous -- no need to wait for the fire to progress to a bonfire to generate heat, smoke, ...

AirBoss - Model 200W - Air Velocity Sensor

Developed decades ago especially for use on the WIPP project in Carlsbad, NM, a repurposed salt mine for nuclear waste disposal. The environment has sticky salt dust in abundance, requiring special probe materials. This work horse air velocity sensor has no moving parts. It’s ideal for monitoring life-support air velocity in working places of mines where 50 fpm minimum must be maintained for life support. Two versions are available, ...

MultiBoss-HV - High Velocity Air Velocity Sensor

Since the AirBoss is limited to +/- 2,000 fpm, we needed a high velocity air velocity sensor for use in fan discharge and ventilation air shafts – i.e. 0-24,000 fpm. Choosing to use the pitot tube method, a differential pressure signal is measured in inches of water gauge. But mine supervisors need to calculate volume of air flow, usually in cfm. Because the pitot tube pressure is highly non-linear -- requiring math to convert to fpm -- our ...

WaterBoss - Submersible Water Level Detector

Bubbler systems have traditionally been used to detect water levels in a down-shaft pond, where pumps are controlled to prevent pond overflow which can weaken gob seals. Bubblers initially work well, but require constant maintenance to avoid clogging and freezing condensation of the air tube. Air pump maintenance and replacement is also a costly nuisance. Rel-Tek developed its WaterBossTM submersible pressure transducer, having a remote ...

RPM-Boss - Precision Monitoring for Belt and Fan Speed

Rel-Tek developed its precision RPM sensor with an on-board processor and 106 frequency reference to provide high precision. It has a magnetic pickup for detecting a rotating magnet on the rotating shaft. Auto-ranging covers 10 to 40,000 pulses per minute, so it can be used on slow belts as well as on high speed fan shafts. It is MSHA classified for hazardous areas of underground coal ...

SmokeBoss - Optical Smoke Detector

This optical smoke detector was invented and patented by Rel-Tek to provide, for the first time, an analog, optical means to monitor optical density (OD) -- the technical term for atmospheric obscuration. Smoke detectors are in CFR30-75 as the alternative to CO detection for fire monitoring of underground conveyor belts. Belt and electrical fires are often smoky, and tend to produce only small amounts of CO. This sensor has a range of ...

MagneBoss - Model MB-EPC-2 - Conveyor Belt Monitoring and Control System

MagneBoss (MB-EPC-2) – A unique, intelligent conveyor belt monitoring and control system with powerful features from its embedded PC, using a robust, highly secure Linux operating system. A new dimension of worker communications was added, providing voice messages warning of belt conditions and ...

MultiGas - Model LDS - Combustible Gas Sensors

Four or eight combustible gas sensors are installed at potential fuel gas leakage sites onboard a bus or truck (engine compartment, fuel tanks, piping/valving, inside cabin) to detect any measurable leakage of potentially explosive fuel gas. A compact cab-mounted operator display (5” x 3” x 1.4”) monitors the four sensors, and activates alarms if any sensor reaches a dangerous threshold. Voice messaging alerts operator ...

WellBoss - Gas and Flame Detection System

WellBoss – Enhance the safety of your oil/gas operations at low cost and with virtually zero maintenance. The WellBoss helps protect your investment, while saving lives and being a good neighbor. Portable -- It’s a skid mounted, transportable gas and flame detection system can be set up quickly on a oil/gas drilling site. Distribute the permissible sensors around the fence line or on top of the well head. When it is no ...

GasHound - Pipeline Sniffer System

GasHound -- pipeline sniffer system – Designed to fit on the front of a truck or ATV, the GH*100 has extraordinary sensitivity to quickly detect minute amounts of methane, ethane, propane and/or hydrogen. The photo shows an installation for road testing in Monroeville. A PC based controller inside the cab runs Millennia-DX software on a secure Linux operating system. It continuously monitors one or more GH100 units and displays the ...

VibraBoss - Vibration Monitor

VibraBoss -- VibraBoss*110 provides convenient vibration monitoring -- ideal for detecting problems with motors, fans, pumps and other rotating machinery. A simple 4-20ma analog output tracks the average vibration, without the need for complex and costly signal processing equipment. The VB-110 comes in 2 ranges: 0-1”/sec and 0-2”/sec; single axis. Covers 420-3,600 RPM. Two-wire hookup, signal powered, requires ...

HotBoss - Model 100 - Wide-Range Temperature Sensor

HotBoss -- The HotBoss*100 is a versatile, wide-range temperature sensor. Connected by just two wires, it is powered from 10-30VDC. The electronic circuitry generates a 4-20ma analog (sinking) signal proportional to the probe temperature. Circuitry is potted for immunity to dust and moisture. Probes come in three styles: A- Ambient: for ambient monitoring; B- Insertion: a 2" to 6" (51mm to 152mm) long x 1/4" ...

AwAir - Air Quality Monitoring System

AwAir System – Developed as a no-maintenance air quality monitoring system for Refuge Alternatives -- emergency shelters. This unique system detects O2, CO, CO2, CH4 and H2 in four locations inside and outside the shelter structure, using gas extraction methods. Sensors and electronics are housed inside a 350 lb XP box. Using multiplexing methods, just one set of sensors is needed, cutting cost. The system has a 96 hour ...

Audio/Visual Alarms

Alarms, alarms, alarms – Rel-Tek manufacture many types of audio/visual alarms, some with 1, 2 or 3 strobes in various colors; some with 1, 2 or 3 distinctive horns; some for fresh air only while others are MSHA approved for use in hazardous areas of coal mines. We also can equip alarms with supervisory functions, such that loss of any supply wire or power would be detected by the monitoring system for immediate service. One especially loud ...

Barriers and Systems

Barriers are required to limit the current and voltage delivered to approved intrinsically safe sensors located in hazardous areas. MSHA requires two types, Power Circuit Barriers (PCBs) and Letter Class Barriers (LCBs). The LCBs contain fail safe electronic components -- fuses, zener diodes, and resistors – in a sealed, tamper-proof housing, all analyzed, tested and approved Intrinsically Safe by either MSHA for mining applications ...

DXcalibar and RMcalibar - Integrated I/O Panels

Integrated I/O panels capable of accessing up to 16 4-20ma IS sensor signals from hazardous areas. The DXcalibar unit has a high-speed communication data highway from the central Millennia-DX control computer. The RMcalibar panel uses an embedded PC processor to handle sensor signals for alarms and logging. Both are covered by a US patent, and are approved to UL-508 for the purpose. Installation contractors love the product, as ...

TelEcon - Model 401 - Stand-Alone Alarm Controller

The TelEcon-401 is our low cost stand-alone controller. This unit is ideal for monitoring 1-4 sensors of any type that has a 4-20 mA output. The programmable RM420i controls alarms depending upon how many modules are installed in the enclosure. The TelEcon-401 can be powered by 110VAC/ or 24VDC. There is also an optional back-up battery re-chargeable system. The size of the panel is depended on the number of modules used. Since many customers' needs ...

Rel-Tek - Model RM420i - Relay Modules for Compact Circuit Board

The RM420i relay modules are compact circuit boards with intelligent electronics and logic for monitoring 4-20mA current loop. Two settable trip points activate SPDT relays. Measures 2.5x3.5x1' (LWH), with corner #6 mounting holes on 2x3.1' centers. Power supply: 12-30VDC; drain 5mA (relays off) to 28mA (relays on). Power increases 20mA while setting thresholds. Relay contacts are rated at 120V, ...

MagiKal - Automatic Gas Sensor Calibration

Rel-Tek's MagiKalTM system takes the labor out of gas sensor maintenance. Repetitive and tedious 'manual' sensor recalibration can cost a bundle over the life of a system. It eliminates the costly labor that is otherwise paid out regularly for manually re-calibrating an array of gas sensors installed around your garage, plant, lab, tunnel or mine. MagiKalTM represents a modest extra investment at the outset, but pays for itself again and again over the ...

RMCalibar - Remote Calibration Panel

Sensors are seldom sited for easy access. Methane and natural gas sensors are normally installed in the roof peaks and skylight areas, because methane is lighter than air. Propane sensors are placed low near the floor and in service pits because this gas is heavier than air. Remote calibration permits each sensor to be calibrated and adjusted without risking accidents with lifts and ladders. There is, of course, no need to stop production and move ...

Rel-Tek - PLC Express Gold for Real-Time Monitoring and Control System

PLC Express Gold is the latest real-time monitoring and control system from Rel-Tek Corporation. PLC Express Gold is a stand-alone unit that can interface with the newest generation of Rel-Tek's intelligent I/O and sensors. The software is Windows ...

UnitKal/DX - Automatic Calibration for Mining Gas Sensors

Monthly calibration of gas sensors is mandated by MSHA regulations. However, the implementation of this monthly routine can consume a great deal of time and resources. Calibration events are usually scheduled for a specific date, however, there may be delays encountered, causing missed calibration dates and risking safety ...

MagiKal - Model II - Automatic Calibration Systems

MagiKal II automatic calibration system is used when a PC is not available or where equipment other than Rel-Tek's is being used. This system, which is virtually invisible to the monitoring system, allows scheduled unmanned calibrations to be performed. These calibration are programmed into the MagiKal II master card via serial comm port from a laptop or desktop computer. They can also be programmed at the factory and shipped ready to use. The MagiKal ...

DXBus - Field I/O Modules Cards

An arsenal of off-the-shelf I/O cards communicate over 10 miles over a twisted-pair cable - or to virtually anywhere on optical fibers, phone lines or radio - at a selectable speed: 19.2k, 38.4k, 57.6k or 115.2k Baud. The 3x4' DX2202 has two analog inputs (4-20ma, 12-bit resolution), two digital inputs (NO/NC dry contacts) and two digital outputs (SPDT relays with 110V-5A ...

Rel-Tek - Power Circuit Barrier

These MSHA approved Power Circuit Barriers are available in three current ratings. The currents available are 1A, 2A and 4A. They are all 120VAC input to 28VDC ...

Rel-Tek - Model TS-100 and TS-3000 - Transient Suppressor for Data Line Protector

TS-100 and TS-3000 Data Line Protectors -- Lightning on data lines can do a very bad number on your computer equipment. We designed a high quality, functionally redundant product that traps line transients in a number of different ways, just in case the transient happens to overwhelm any one way. For maximum protection, delta connected 1500A pulse zeners, fuses, resistors, ferrite snubbers, gas discharge tubes, and a broad-plane ground intercept matrix ...

Rel-Tek Corporation Products

Alarms

Safety Barriers

I/O Modules

Sensors

Sensors - Toxic Gas Sensors - CO2Boss - Carbon Dioxide Sensors

Systems

Smaller Monitoring Packages

GasBoss/H2 - Hydrogen Gas Detection Systems

Auxiliary Items

Rel-Tek Systems

Others

Intrinsic Safety Equipment - Barriers