Data sheet

DM-602-NH3

Detcon Model DM-602IS-NH3 sensor is designed to detect and continuously monitor NH3 in air over the range 0-100 ppm.

The sensor assembly consists of an electrochemical fuel cell mounted in an Intrinsically Safe stainless steel and ABS plastic housing that includes a splashguard with integral cal port, a signal conditioning control transmitter circuit, a base connector board and an explosion proof junction box.

The Intrinsically Safe sensor housing design allows direct contact of the target gas to the electrochemical sensor, thus maximizing response time, detectability and repeatability.

And because the Intrinsically Safe housing design does not use a stainless steel flame arrestor, it eliminates inaccurate readings due to target gas absorption.

  • CSA and UL Approved: Class 1, Div. 1, Groups B, C, & D

  • Outputs: 4-20 mA, RS-485 Modbus™, 3 relays (2 alarm, 1 fault)

  • Sensor status and parameters accessible via RS-485 Modbus™

  • Simple menu driven calibration - takes less than 3 minutes

  • Backlit LCD, and LED indicators for Fault, and Cal status

  • Universal plug-in transmitter

  • Intrinsically Safe Sensor Housing

  • Plug-in field-replaceable transmitter

  • Electrochemical plug-in sensor

Sensor Type

Electrochemical Fuel Cell

Measurement Range

0-100 ppm Ammonia

Other ranges available

Repeatability

±2% FS

Response/Clearing Time

T90 <90 seconds

Span Drift

<2% signal loss per month

Operating Temperature Range

-40°C to +50°C; -40°F to +122°F

Operating Humidity Range

15-90% RH non-condensing

Output

Linear 4-20 mA DC

RS-485 Modbus™

3 Relays (alarm 1, 2, fault, contacts 5 amp)