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Model ML-215 - 2G Data Logger

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The ML-215 data logger is a small, ultra low power, cost effective data logger with built-in QUAD-band GPRS modem. This small data logger, is further provided with an internal temperature sensor, 4GB micro SD card and an 2FF SIM card slot. The logger can be powered by an internal 3.6 Volt Lithium battery that will last for years when the logger is configured in a lowpower mode. It is also possible to power the data logger using an optional integrated 3xAA NiMH PV-panel or 8..30V external DC source.

The data logger can acquire physical signals by 2 current loop inputs, 3 voltage inputs (1x potentiometer) and 3 digital inputs. The data logger is provided with one serial port to capture measurements from ASCII, MODBUS/RTU, NMEA-0183 or SDI-12 compatible sensors. External sensors can be powered by the data logger itself, to prevent them to consume power while the data logger is a sleep. Up to 8 mathematical channels are available to calculate meaningful engineering values derived from sensed values (e.g. a polynomial to calculate a flow from a stream level). Supports up to 8 aggregation channels (e.g. to record 10 minute windspeed averages sampled at 1Hz).

Logged data can be pushed to a central host by HTPP(S), FTP(S), e-mail(SMTP), secure TCP or MQTT at configurable intervals. Optionally logged data can be transmitted by satellite as well (Iridium SBD).

The ML-215 is available in several editions and as ML-315 (3G) with 3G instead of GPRS MODEM.

When equipped with the integrated solar panel a complete self providing remote monitoring station can be arranged, all you need is a logger and applicable sensor(s). This self providing 2G logger is costs saving, because you don't need: a) solar panels, b) big batteries, c) cellular modem and d) encapsulating cabinet.

  • Data logging
    • 1 second to 1 day intervals
    • regular, alarm and independent intervals
    • daily operation time bracket (e.g. 07:00AM to 20:00PM or 21:00PM - 06:00AM)
  • 5x analog inputs
    • 2x current loop inputs (0/4..20mA, 12bit resolution)
    • 2x voltage inputs (0..10V, 12bit resolution)
    • 1x voltage/potentiometer input (0..3300mV, 12bit, max. 10M) a/o to connect a wind direction sensor
  • 3x digital inputs (status, event or puls counter) a/o to connect a flow meter, rain gauge or reed relay based wind speed sensor
  • Internal sensors (a/o battery, processor temperature, signal strength)
  • 8x calculation channels, to derive engineering values from sensed values using mathematical operators and functions (a/o cos, sin, atan2, ln, sqrt)
  • 8x aggregation channels, logging minimums, maximums, averages, gusts and standard deviations sampled at 1Hz max.
  • 1x Serial port for connecting external sensors (RS-232, RS-485 or SDI-12)
  • Serial port drivers
    • ASCII: Sensors autonomously outputting readable lines of numeric values
    • MODBUS/RTU: Read-out value registers from MODBUS/RTU slave devices
    • NMEA-0183: Sensors outputting standard and custom sentences
    • SDI-12: Read-out of up to 16 devices with up to 20 parameters per device using aC!, aM!, aCx! or aMx! commands
  • 1x digital open collector alarm output to switch on a relay in case a parameter value is outside its limits (e.g. a high water level)
  • Optional JPEG camera CAM-D1.3M or CAM-x0.3M
  • Optional GPS receiver GPS-E3329
  • Built-in QUAD-band GPRS modem
  • 2FF (Class B) SIM-CARD slot
  • 4GB SD-CARD
  • 100mA@3.6V average operating1) current during a duty cycle of less than 1 sec2) per log interval.
  • 250mA@3.6V average operating current during 20..60 sec. 3G data transfer
  • 100uA@3.6V sleep current
  • 12V@100mA switchable power outlet to power external sensors
  • Power supply
    • 3.6V DC input for internal Lithium battery3)
    • Optional 3xAA NiMH3) solar charger integrated in cover
    • Optional 8..30V DC-Adapter integrated in cover
  • Data push
    • 1 minute to 1 day intervals
    • regular and alarm intervals (direct push on alarm raise or fall)
    • daily operation time bracket (e.g. 07:00AM to 20:00PM or 21:00PM - 06:00AM)
    • native, JSON or CSV log files by HTTP(SSL/TLS), FTP(TLS Explicit), e-Mail(SMTP), secure TCP(AES-128) or MQTT
    • JPG pictures by HTTP(SSL/TLS), FTP(TLS Explicit), e-Mail(SMTP), secure TCP(AES-128) or MQTT
    • SBD messages by Iridium satellite modems (960x)
  • Alerts by SMS, e-Mail or MQTT
  • Configuration and FW upgrade by:
    • Terminal interface: USB (local) or TCP (remote)
    • Over-the-air file transfer: TCP, HTTP or MQTT
  • Rugged and waterproof IP67 enclosure (130x120x75mm)
  • Optional pole mounting bracket
  • Integrated GSM antenna, external GSM antenna optional
  • Wide temperature operating range –30°C +75°C

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