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Prism Gas Detection Pvt. Ltd.
Prism Gas Detection Pvt. Ltd.


Toxic Gas Transmitter

We are one of the leading Manufacturers and Suppliers of Toxic Gas Transmitters in Mumbai. Toxic Gas Transmitter 1000D is a series of direct use sensor-transmitter combination units housed in weatherproof (IP65) enclosures. Alternately, Toxic Gas Transmitter is also available in FLP version suitable for hazardous areas (IIA/IIB). Toxic Gas Transmitters are designed for standard two wire operation where the output is supplied via the same wire pair as the power supply. The external circuit loop is connected to the Toxic Gas Transmitter through a screw terminal connector. The units are supplied pre-calibrated for the specified range, and the sensitivity of the device should not drift by more than 2% of full signal per month. Some sensors have cross interference effect of other gases. It is important to specify air composition to help choose appropriate sensor for the Toxic Gas Transmitter.

Features Of Toxic Gas Transmitter

  • Can be operated over a wide power supply range (Nominal 24 V DC)
  • Total loop resistance in external circuit depends upon the operating voltage
  • Maximum loop resistance includes measuring resistor at the remote receivers and any series meters for calibration
  • Sensors require just few seconds to settle after start-up
  • Some models (analog type) provided with potentiometers for routine span and zero adjustment
  • Except requiring periodic recalibration, transmitters are maintenance-free
  • Provide faultless service throughout the working life of the sensor
  • Circuit uses SMD and microcontroller based design to provide excellent linearity, accuracy and stability
  • Circuit imposes no constraints on the sensor
  • Performance characteristics of sensor are unaltered by addition of circuit board

Optional Enhancements For Toxic Gas Transmitter

  • 4 digit LCD display
  • Multi-parameter back lit LCD display
  • HART protocol output
  • Modbus protocol
  • PC calibration
  • Programming facility


  • Very low maintenance
  • 4 digit LED display
  • Microcontroller SMD components
  • Weather proof dust tight IP 66 enclosure
  • Aesthetical looks
  • 2 wire 4-20 mA output
  • Compatible : DCS, PLC, PRISM Monitors
  • Loop powered wide OPTG voltage
  • High sensitivity sensor

Connections To Controller

  • Use Positive and Signal terminals of the controller
  • Controller must have a loop shunt resistor
  • Max. Loop resistance with 24 V supply is 500 ohms including cable resistance
  • Do not connect ´N ´terminal. This is for service personnel only


Type Gas Transmitter
Material Cast Aluminum
Color Grey
Feature Accuracy, Alarm System, Durable, Easy To Use
Usage Transmitter
Display Type Digital
Power Source Battery
Warranty 1Year
Gas Type Toxic Gas


Operating Voltage 15-30VDC
Operating Temperature 0 - 50 deg C
Power consumption < 2 W
Cable entry Cable diameter : 7 - 9 mm
Indications 3 digit LED display
Enclosure ABS, IP65 with transparent lid
Colour of box Light Gray similar to RAL 7035
Size (H x L x D)mm 80 x120 x 85
Weight < 1 Kg
Mounting Wall
Resolution 0.1%
Output linearity Linear over full range
Calibration Via Zero & Span pots
Expexcted Optg life 2 yrs.

Gases Range (ppm)
CO 2000, 5000, 10000
H2S 20,50,100
SO2 20,2000
NO2 20
NO 250,5000
Cl2 20
EtO 100
PH3 10
HCN 100
O2 25%v/v

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