The E-Sense Electrochemical Gas detector can be configured as a loop powered 4-20 milliamp (mA)
transmitter or as a 3-wire 0/4-20 mA transmitter. The analogue output is representative of the gas
concentration over the range of the detector for the target gas, operating via natural diffusion. Each
detector is factory calibrated to the target gas with certified calibration gas.
This product contains an electrochemical gas sensor element made by DD Scientific UK.
E-Sense detectors accept a range of electrochemical sensor elements, see specifications for gas
types and ranges. The electrochemical sensor element is enclosed in a Brass or PTFE sensor
module which is replaceable. The sensor element will expire over time and are easily replaced by
unscrewing the lid and swapping the sensor element.
The detector has a removable four pin connector providing connection to positive supply (24 VDC),
zero-volt supply, mA current output and an Earth pin for the cable shield.

If a voltage output of 0-10 V is required select 3-wire mode and remove the 4 mA jumper for
connection to 3rd party controllers. A 500 Ohm resistor is required at the controller end to convert
the mA to a voltage.
Gas characteristics, air flow, concentration of leaked gas, volume of room, etc. all contribute to the
detectors ability to detect the target gas.