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The following product catalogs and spec sheets are in PDF format. You will need the freeware Adobe Acrobat Reader 3.0 or higher to access them. If you do not have one yet, download the freeware from

Products Brochure:
8-page Products Brochure (file size: 1,281K)
includes descriptions of IST products under the five categories: solid-state, infrared, photoionization, electrocemical, and catalytic bead.

Sensor Selection Guide: from the book Hazardous Gas Monitors

Sensor Selection Overview Diagram (file size: 56K)

Sensor Selection Guide (file size: 190K)

Stationary Instruments--Sensor Transmitters:
Models SM95, SM84 and 4-20 IQ (file size: 186K)
descriptions and specs; two pages.

Stationary Instruments--Controllers:

MP Series (file size: 436K)
descriptions and specs for models MP202, MP204, MP24 (rack/panel mount), and MP220EX (explosion-proof); four pages.

S2K Flexible Sampling System (file size: 361K)
description and specs; two pages.


Portable TLV Falcon (file size: 223K)
description and specs; two pages.

100+ Gas Portable: IQ-1000 (file size: 428K)
description and specs; gas list; four pages.

Portable Models IQ-250 & IQ-350 (file size: 750K)
description and specs; two pages.

Portable IQ-350 Eagle (file size: 231K)
description and specs; two pages.

Special Applications:

Toxic and Combustible Gas Sensors for the Semi-Conductor Industry
(file size: 292K)
description and specs; two pages.

Sensors for Refrigerants (file size: 38K)
description and specs; one page.


2-Page Accessories Descriptions (PDF, file size: 45K) • Field Calibrators (premixed, metered gas samples) • Premixed Gas Cylinders • Calibration Bags • Ambient Air Sampling Pumps • Sintered Water Guards (to protect sensors during hose downs, etc.) • Duct Mounting Fixtures • 2-oz. Pure Gas Bottles • Calibration Cannisters with Syringe

This site contains a lot of PDF files. If you do not have Acrobat Reader to access these files, download the freeware from If you do not have a high-speed connection, there will be some delay before the document you selected comes up.
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View/download PDF versions of:

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)

> Grain Silo Fumigation: How to Make a Sensor Work as a Process Analyzer (Australia)

> CO Monitoring in Parking Garages and Tunnels in Switzerland

> H2S Monitoring/Datalogging in Manholes and Lift Stations in Las Vegas, Nevada