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The SmartMaxII is a full featured monitor/transmitter that installs anywhere in the field and handles the readings from as many as four of the same-type sensor.

Works with all sensor types

Works with any Control Instruments diffusion sensor. For area monitoring of combustible gases, use our catalytic sensors. For detecting oxygen levels or toxic gases such as hydrogen sulfide, carbon monoxide, sulfur dioxide, nitrogen dioxide, ammonia, chlorine and ethylene oxide we offer electrochemical sensors.

Up to Four sensors connect to one SmartMaxII

Each SmartMaxII continuously monitors the readings from as many as four same-type sensors. Sharing the SmartMaxII with more than one sensor allows you to dramatically lower the cost of your detection system!

Three Built-in Relays

The SmartMaxII includes three internal relays that you can program to activate external lights and horns—and to indicate when the system is undergoing calibration. Built-in relays provide maximum safety and ensure that critical alarms are initiated by the sensor.

Full-Featured Display

The SmartMaxII's display panel includes two status indicators and an eight-character alpha numeric Liquid Crystal Display. The operator can reset, acknowledge, and access all calibration, programming and diagnostic routines using the front panel's two pushbuttons.

Fast Response with Speed Reader Circuitry

The SmartMaxII includes Control Instrument's unique Speed Reader predictive response circuitry to cut response time by up to 90%, giving the earliest possible alarm.

Two Kinds of Output Signals

The SmartMaxII is equipped with both 4-20mA analog output and a RS-485 digital I/O port. Use the 4-20mA analog output to connect to your PLC, display meter or recorder and for true digital communication, the SmartMaxII provides a Modbus compatible RS-485 half duplex serial port.

Self-Diagnostics

The SmartMaxII incorporates routines for self-diagnostics. All program and calibration data are stored in non-volatile memory that cannot be lost when power is turned off. Advanced signal processing reduces zero drift to eliminate false readings, reduce maintenance, and extend the sensor's useful life.

Available in Four Styles

The SmartMaxII is ready for panel mounting right out of the box. It is also available in NEMA 1 and 4 wall mount housings, as well as an explosion-proof Division I field enclosure for indoor and outdoor locations.

Three-way Access to Control, Adjustments

In addition to using the front panel's pushbutton, you can also access controls and adjustments non-intrusively through your PLC or by using a flashlight.

Typical Applications

Area monitoring of hazardous gases is a concern throughout many industries including: Refineries, Pipelines, Chemical plants, Semiconductor manufacturing, Storage rooms, Engine test cells, Garages, Battery rooms, Oil rigs, Gas Drilling, Automobile manufacturing and other manufacturing plants.