Signal Instruments Gas Analyzers and Combustion Research


Microprocessor Control

Advanced Gas Analyzers

2-Year Warranty


Signal Instruments gas analyzers are complete product line of microprocessor-based gas analyzers. Legacy Series III models are available to measure carbon monoxide (CO), carbon dioxide (CO2), oxides of nitrogen (NO, NO2, NOx), oxygen (O2), sulfur dioxide (SO2) and hydrocarbon gases (total hydrocarbon and non-methane total hydrocarbon).

gas analyzers


gas analyzer

Microprocessor-based Gas Analyzers with Advanced Features

Auto-Start, Auto-Range Change, Range ID,
Manual & Remote contact control, RS232 (AK Protocol),
4-20mA and 0-10 Volt concentration outputs,
Auto-Calibration Adjustment, Programable alarms,
Switchable 110/240VAC 50/60 Hz operation, CE Marked

[Click the graphics to link to specific model data]

Infrared Product Range Brochure

hydrocarbon analyzer

3000HM Heated FID
Total Hydrocarbon Analyzer

VOC monitoring and combustion applications.

VOC analyzer

3000HM Methane-Only
FID Gas Analyzer

Monitor methane in the presence of VOC/ hydrocarbons.

nox gas analyzer

4000VM Heated Vacuum Chemiluminescence
NO/NO2/NOx Gas Analyzer

191°C Sampling system and 0.4µ inlet filter, Cooled PMT detector, 0-4ppm to 10,000 ppm without NO2 loss.

co gas analyzer

7000FM Series GFC-IR Gas Analyzers
for CO, CO2 or SO2
Gas Filter Correlation rotary filter system w/ Solid state detector
Models for R22, Methane, Nitrous Oxide, Nitric Oxide also available

o2 oxygen gas analyzer

8000M Paramagnetic Oxygen Analyzer
Heated sensor to eliminate condensation and minimize drift.
For dry O2 gas measurement. 0-5%, 10%, 25% auto-range.

GFC-IR gas analyzer

9000MGA Multi-Gas Analyzer
Up to 2 gases by GFC-IR plus paramagnetic oxygen measurement. CO, CO2, NO, SO2, O2

ndir gas analyzer

Model 418 NDIR/Luft Gas Analyzer
Gas-filled, dual chamber detector for highly selective detection of a single gas. CO, CO2, SO2, NO, NH3, NF3, SF6, N2O, chlorofluorocarbons (CFCs) or hydrocarbons


portable hydrocarbon analyzer

3010P MINIFID Portable Heated FID
Total Hydrocarbon Analyzer

A three-gas FID featuring the same detection as the 3000HM. Comes with a 5m heated sample line and built-in controller. Manual operation without microprocessor control. Bottle rack may be detached for use with standard, full sized gas cylinders.


Remember to check out our complete line of gas sampling and analysis accessories

Interested sales representatives in all regions of the U.S. should contact us.

Dual IR Gas Analyzer

Measure multiple gases by gas filter correlation plus paramagnetic oxygen measurement all in a single analyzer!




Multi-Gas Analyzer


Model 9000MGA Multi-Gas Analyzer

Infrared Product Range Brochure


The Model 9000MGA is a legacy Series III microprocessor-based gas analyzer featuring gas filter correlation infrared measurement and a paramagnetic oxygen module. Up to three gases may be measured in a single 3 RU high standard legacy Series III instrument case.
High and low concentration analyzers employ a unique dual length optical path for drift-free, linear operation.


2 or 3 channel

Fast Response

3 Ranges per channel

AK Protocol

4-20mA & 0-10V
Chart outputs

Menu Diagnostics

2 year warranty

Available in the following
standard configurations:
  • CO+CO2
  • CO+CO2+O2
  • CO+NO
  • CO+NO+O2
  • Hi-CO+Lo-CO
  • Hi-CO+Lo-CO+O2
Consult us for
other configurations
not shown here

We are excited about getting this product. We have fielded many questions in the past and turned away countless product inquiries for high accuracy, multi-gas applications. This is the only multi-gas Gas Filter Correlation Infrared (GFC-IR) gas analyzer available anywhere. This equipment can also be outfitted with a paramagnetic oxygen module.
Based on the proven, 7000FM Series GFC-IR and Model 8000M Paramagnetic oxygen gas analyzers, the 9000MGA is a much higher quality alternative to single-beam IR (a technique that is subject to drift) and fuel cell oxygen multi-gas analyzers that are currently available.
Save yourself the trouble and disappointment of buying something that won't work properly. The 9000MGA is available now and ideally suited for combustion research / combustion analysis applications.

The standard 3-rack unit tall, legacy Series III instrument case has up to three sets of keypads and operator displays on the front panel. Each channel may be operated separately (as a seperate gas analyzer) and plumbing connections may be easily configured at the rear panel for this type of operation. This is a dry-basis measuring instrument so it must be used on a dry or conditioned gas stream. A series 200 gas conditioner or similar chiller is necessary for measuring raw exhaust and combustion gases directly.

Applications for the 9000MGA include:

Environmental Compliance
Combustion Research
Process Monitoring
Gas Turbine Emissions
Automotive Emissions Research


Available Ranges (per channel)

A: 100,500,1000ppm
B: 1000,5000,10000ppm
C: 1,5,10%
D: 5,10,20%
E: 20,50,100%
*Low ranges down to 0-10ppm may be specified


CO / CO2
CO/ CO2 / O2
NO / CO / O2
CO *(LO) / CO (HI)
CO *(LO) / CO (HI) / O2

Other configurations and gas combinations available



355 North York Rd.
Willow Grove, PA 19090
Tel: 215.830.8882
Fax: 215.830.8922
Toll free: 866.SIGNAL.U
Hours of operation:
M-F 8AM to 6PM Eastern Time
weekends and 24-hour emergency service by agreement
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