RIELS - Model PD33X -Pressure Differential Transmitter

The PD39X series Differential Pressure Transmitters do not measure the differential pressure directly but use two absolute pressure sensors to detect the measurement indirectly.

Each side of the pressure has two connection ports allowing the PD39X to be used easily in pressure lines. In this way it is also possible to measure the differential pressure exactly if the ratio standard pressure range/differential pressure is high.

All reproducible pressure sensor errors (i.e. non-linearity and temperature dependencies) are completely eliminated thanks to the mathematical error compensation.

The sensor signals are measured with a 16-bit A/D converter making it possible to measure individual standard pressure ranges with an accuracy of 0.05%FS over the entire pressure and temperature range.

The interface offers the following functions:

• Reading of the pressure and temperature values for both sensors allowing to read not only the differential pressure but also the two standard pressure ranges.
• Calibration of null points and amplification.
• Graduation of the analog output with respect to different pressure ranges or different units of measure.
• Configuration settings such as measurement frequency, low pass filter (LP), bus address, etc.
• Reading of information such as serial number, compensated pressure and temperature ranges, etc.

The transmitters are equipped with a two-wire RS485 semi-duplex interface, compatible with the bus system that takes the "MODBUS RTU" as a model. RIELS offers interface converters to RS232 or USB to be used for this purpose. The READ30/PROG30 program and protocol are available free of charge.

• Product features
• Principle of measurement : Differential
• Informations measured : Pressure
• Detection type : Continuous measurement
• Measurable media : Air, Hydraulic Oil (Petro), Natural Gas, Water., (the indications on liquids are indicative and vary with the configuration of the product)
• Viewing Modes and signals : Using signal output
• Explosion protection : Safe zone
• Pressure type : Differential
• Minimum process fluid temperature : -40 °C
• Maximum process fluid temperature : 100 °C
• Maximum process pressure : 300 Bar
• Maximum measurable pressure : 3 Bar
• Storage temperature : -40...+100 °C
• Ambient temperature : -40...100 °C
• Properties of the fluid : Aggressive
• Zero point calibration : No
• Details of the signal inputs and outputs
• All signal outputs available : RS485, 4...20 mA, 0...10 Vdc
• Signal Output Type : Current
• Output details : 1 x Analog 4…20mA
• Registry features
• Display : No
• Electrical data
• Type of electrical connection : DIN 43650 connector
• Reverse polarity protection : No
• Mechanical data
• Process connection type : Threaded GAS(F)
• Diameter process connection : 1/4" - DN6
• Materials in contact with the measured fluid : AISI 316L (1,4404) - Stainless steel
• Seal materials : FKM (VITON®) - Copolymer of vivilidene fluoride
• Other housing materials : N/D
• Diaphragm material : AISI 316L (1,4404) - Stainless steel
• Height : 71 mm
• Width : 44 mm
• Depth : 60 mm
• Case material : AISI 316L (1,4404) - Stainless steel
• Approvals
• Naval approvals : None
• Food / pharmaceutical approvals : None
• Atex approvals : None
• Standards and Certifications : RoHS, Directive 2014/35/EU “Low voltage Directive”, Directive 2014/30/EU “Electromagnetic compatibility Directive”
• CE omologation : Yes
• EX-Protection : None
• Logistics
• Type of packaging : Carton BOX
• Contains batteries : No
• ETCN : N/D
• country of origin : Switzerland
• Customs Code : 90269000
• Gross weight : 1 kg
• Net weight : 0,75 kg
• Packaging volume : 0,007 m³
• Packing length : 26 cm
• Packaging width : 21 cm
• Packaging depth : 13 cm