Single Gas Sensor Module (SGSM)
Operations Manual
Super Systems Inc.
Page 4 of 38
Page 4 of 51
Introduction
SSi provides hydrogen gas analysis technology for use in heat treating and other industrial
environments. This manual covers the two H
2
versions of Single Gas Sensor Module (SGSM).
The in-situ H
2
sensor (A20829) is designed to mount directly to a vertical pipe on a furnace,
while the flow-through sensor (A20830) is designed to be mounted on DIN rail. For compliance
with electrical connection standards, the in-situ H
2
sensor functions are routed to a 10-Position
plug and an included connection cable. The connections for the DIN mounted flow-through
sensor are on terminal blocks located on the face of the sensor.
The primary function of each of these sensors is to measure H
2
, but each of them has the ability
to measure Oxygen (O
2
) with the addition of an external O
2
sensor (see details below). Note that
the Lambda O
2
sensor requires 12 VDC power.
Specifications
Specifications
In-Situ H2
Din Rail Mount H2
Part Number
A20829
A20830
24VDC (10-30VDC Acceptable) Power
Input
Yes
Yes
Analog Outputs (4-20mA or 0-5VDC)
2
2
Ethernet
1
1
USB Host port
0
1
USB Client port
0
1
RS485 Communications Ports (modbus
RTU)
1
2
Communications Port for HMI
0
1
Wiring Method
Cable (included)
Direct
Inputs for Optional Oxygen Sensor
Yes
Yes
Measurement Range
0 – 100% of gas concentration
Accuracy
±1% of full scale (±0.1% of gas concentration,
based on 100%)
Resolution
0.1%
Response Time (to 90% of Reading)
0 - 6 seconds
Maximum Operating Temperature
122 °F (50 °C)
Field Calibration
Via web interface
Measurement Method
Thermal Conductivity
Specifications
Optional Oxygen Sensor
Part Number
31435
Measurement Range
0 - 21%
Accuracy
±0.1%
Measurement Method
Lambda Zirconia