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IQ-250 and IQ-350 Single-Gas Portables

IQ-250 is a single-gas, portable instrument which can be equipped with solid state sensor. Any one of over 150 toxic and combustible gases can be chosen for detection. The sensor is attatched via a coiled cord which allows readings to be taken up to 24" from the unit.

Buzzer and LED alarms alert the user to the presence of hazardous levels, and a digital display indicates the gas concentration. User adjustable setpoints are provided for low, mid, and high alarm levels. The IQ-250 is compact, weighing just 22 ounces including batteries. The unit will operate approximately 14 hours on 4 AA-size alkaline batteries.

IQ-350 is a single-gas, portable instrument which provides all of the features of the IQ-250, and in addition, it comes equipped with an internal sampling pump and wand assembly.

The unit can be equipped with either a solid state sensor, electrochemical sensor, photo-ionization detector (PID), or infra-red (IR) detector, and can be configured to detect any one of over 150 toxic and combustible gases. The IQ-350 operates approximately 20 hours on 4 C-size alkaline batteries.
Downloadable 2-page IQ-250/IQ-350 Brochure (PDF; file size: 539K)

For more information , contact:
Tel: (U.S. & Canada) 1-800-478-4271; (International) 1-949-452-9000
Fax: 1-949-452-9009;  Internet:
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View/download PDF versions of:

Gas Sensor Selection Guide (File size: 196K)

Hazardous Gas Data - comprehensive reference on physical and chemical properties for industrial hygiene and occupational health & safety applications (File size: 396K)

PID Correction Factors - a comprehensive reference on PID correction factors for 222 gases (File size: 100K)

Installation & Instructions Manuals for:
MP Controller (File size: 1.1MB)
b) 4-20 IQ (File size: 536K)
SM95 (File size: 567K)

How to Calibrate Sensors
(File size: 427K)

Introduction - from "Hazardous Gas Monitors" book (24 pages)- includes descriptions, "Terms, Definitions & Abbreviations," fully illustrated with charts and graphs, and types of protection (File size: 544K)

About Alarms (File size:148K)

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