4 • 65-2331-04 H
2
S Transmitter
Plug-In H
2
S Sensor
The sensor is secured within the detector assembly by the housing cap. Through a series
of chemical and electrical reactions, the sensor produces an electrical output that
corresponds to the detection range of the transmitter.
Calibration Adapter/Splash Guard
A calibration adapter/splash guard is installed on the H
2
S detector. A fitting at the bottom
of the calibration adapter/splash guard allows a length of tubing to be connected for
calibration and routed to a more easily accessible location (near the amplifier junction box
is optimal for ease of calibration). The calibration adapter/splash guard also protects the
detector from splashing water or direct water spray.
Amplifier
The amplifier converts the electrical output from the sensor to a 4 to 20 mA signal that
corresponds to the detection range and transmits the signal to a gas monitoring controller.
A foam gasket that orients the amplifier and keeps it from rotating is installed on the
bottom of the amplifier. The amplifier includes the controller terminal strip, detector
terminal strip, zero pot, span pot, and test points (Figure 3).
Figure 3: Amplifier Component Location
Controller Terminal Strip
The controller terminal strip is a two position plug-in style terminal strip located at the
top edge of the amplifier. Use the controller terminal strip to connect the amplifier to a
controller.
Detector Terminal Strip
The detector terminal strip is a four-point plug-in style terminal strip near the bottom of
the amplifier. Use the detector terminal strip to connect the H
2
S detector to the amplifier.
SI
G
/PW
R
S
TO
X
IC
O
X
Y
Detector Terminal Strip
Controller Terminal Strip
SP
A
N
ZE
R
O
+ Test Point (Red)
- Test Point (Black)
Factory Adjust Pot
Span Pot
Zero Pot
