C
12-17 Combustible Gas Transmitter
4
O&M Manual
Rev-D
INTRODUCTION
Series C12-17 sensor/transmitters combine catalytic bead type gas sensors and an electronic
amplifier that transmits gas concentration using a standard 4-20 mA signal. They are designed to
continuously monitor combustible gas concentrations in ambient air near process tanks or piping, or in
enclosed spaces where combustible gases may accumulate. C12-17 transmitters are available in two
versions, one containing an integral display and single alarm relay, and a second that is a simple “blind
transmitter” with no display or alarm functions.
Gas sensors are housed in a corrosion resistant stainless steel shell with a sintered metal flame
arrestor isolating the sensing elements from the ambient air. A 3/4" NPT thread at the back of the sensor
mates with the threaded entry on the explosion-proof transmitter enclosure. Series C12-17 sensor
transmitters are designed for use in Class 1, Division 1, Groups A, B, C, or D locations.
A typical installation for the C12-17 is shown in Figure 1 below.
Figure 1 - Typical System Diagram (ATI-0145)
