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Gas Detectors
Single Channel Controllers

Gas sensor modules with a performance difference. Sierra Monitor gas sensor modules provide continuous trouble-free monitoring of hazardous gas conditions to protect your personnel and facility. Sierra Monitor integrates extensive gas sensor technology with electronics expertise to offer a broad line of diffusion gas sensor modules. The modules condition the sensor signal and provide an industry standard 4-20 mA output that can interface with single or multichannel controllers and distributed control systems. Sierra Monitor employs catalytic bead, electrochemical, semiconductor and infrared technologies to match the appropriate sensing technology with the application requirement.

  Gas detectors

Also check out the IT Series smart gas sensor modules

Analog Gas Sensor Modules
These modules provide a 4-20 mA signal of gas concentration for combustible gases, oxygen and toxic gases and can interface to an SMC single channel controller or other devices
4501 Series 2-wire, 4-20 mA loop-powered gas sensor modules
IT Series Intelligent Technology series with integral menu-driven scrolling LED display, long frequency intervals, integral relays, Sentry output, 4-20 mA output, Modbus interface
4101 Series Standard gas sensor module with 4-20 mA output
Specialty Analog Gas Sensor Modules
4100 Series Solid-state sensors used for combustible gas (ppm) and carbon monoxide gas detection
Single Channel Controllers
Accept the 4-20 mA signal from the analog gas sensors and provides digital display, LED alarm display and relay contacts (low alarm, high alarm and trouble)
4001 controller Controller in a NEMA 4X wall-mount enclosure
4011 controller Controller in a 1/8 DIN panel-mount enclosure

Features provided on Sierra Monitor gas sensor modules include:

Reliability you can count on – Sensor design and electronic conditioning are carefully matched to maximize output signal integrity. All gas sensor modules are designed for hostile or hazardous environments and key sensors are FM approved.

Automatic low sensitivity check to ensure monitoring integrity – after calibration a sensor sensitivity check on many models confirms sufficient sensor response.

Convenient diagnostic measurements – the Sierra Monitor gas sensor modules provide the diagnostics necessary to ensure successful operation.

False alarm avoidance – during power-up and calibration on many models the output is logged at 4 mA to avoid erroneous readings.

Simple zero and span adjustments – featured on all Sierra Monitor gas sensor modules, using easily accessible potentiometers

Gases monitored by SMC