RKI Instruments M2A - Manual (Page 14)

9 M2A Transmitter Operator’s Manual
Figure 7: 65-2495RK H
2
S Detector Non-Explosion Proof
ESM-01 Detectors
The construction of the various ESM-01 detectors is similar. Each of the ESM-01 detectors has a
different replaceable plug-in sensor that protrudes through the detector housing cap. Although
ESM-01 detectors look the same except for the plug-in detector, the detector housing which
includes the detector socket and conditioning circuitry is specific to a sensor type. For example, a
detector housing from a Cl
2
detector cannot be used with an NH
3
detector. One of the two detector
wires is color coded for each specific detector type. The ESM-01 detectors include a removable
splashguard that screws onto the detector housing cap. When it is necessary to apply gas to an
ESM-01 detector, remove the splashguard to allow access to the sensor that protrudes through the
detector housing cap. You can then push the appropriate ESM-01 calibration cup onto the sensor.
Figure 8: ESM-01 Type Detector
Cap Gasket
Detector Housing Body
Hydrophobic
Membrane
H2S Plug-in Sensor
Detector
Housing Cap
Detector Housing Body
(different for each detector type)
Cap Gasket
Splash Guard
(removable)
Detector Housing
Cap
Sensor
(different for each detector type)