Model 7500 Infrared Analyzer


The 7500Z and 7600Z Series Infrared (IR) Analyzers are capable of detecting up to four chosen, individual IR absorbing components (i.e. CO, CO2, CH4, SO2, NO or NOX with external converter) on a continuous basis. Conveniently packaged in either a 19” rack mount (Model 7500ZA / 7600ZA) or NEMA-4 wall mount enclosure (Model 7500ZB / 7600ZB), the analyzer can also be supplied with an oxygen sensor, providing the operator with space saving, five in one, cost-effective design. The NEMA-4 enclosure can be purged to meet Class I, Div 1 (Zone 1) or Class I, Div 2 (Zone 2) hazardous area installation requirements.

  • Brand
  • Overview
  • Features
  • Specifications


Teledyne Analytical TAI


Twin Detector

A high-sensitivity mass flow type twin detector is utilized for infrared measurements. By using a single beam, single path design in conjunction with a serial dual-layer transmission detector, the 7500Z Series delivers long-term, drift-free performance. The 7600Z Series achieves greater performance through an internal sample-switching system which serves to cancel zero drift.

Paramagnetic/Electrochemical Sensor

The oxygen concentration in the sample gas can be detected by either a built-in paramagnetic sensor or electrochemical sensor. The concentration of the desired gas is displayed on a large, easy-to-read back-lit LCD. The user interface is very intuitive and the menu/mode selection buttons, which are readily accessible, provide the operator with dynamic control and extensive diagnostic capabilities.

Available Analysis Gases and Ranges

​​Gases ​Ranges​
​NO ​0-200 ppm to 0-5,000 ppm
SO2 ​0-200 ppm to 0-10%
​CO2 ​0-100 ppm to 0-100%
​CO ​0-200 ppm to 0-100%
​CH4 ​0-500 ppm to 0-100%
​O2 (built in fuel cell) ​0-10% to 0-25%
​O2 (built in paramagnetic) ​0-5% to 0-100% / 95-100%


  • Steel case for indoor installation
  • Wetted materials: 304SS sample cell, chloroprene rubber seals
  • CaF2 optical windows, Tygon​/Teflon/Polypropylene tubing
  • 1/4″  NPT gas connections (1/4″ RC optional)
  • 1 or 2 ranges per gas with auto-ranging and remote range selection (optional) capabilities
  • O2 correction calculation available
  • Integral auto-calibration and remote calibration functionality with solenoid valves to be provided by end user (integral auto-calibration valves available as an option)
  • Reading averaging capability available
  • Integral compensation for atmospheric pressure changes available
  • CE marked, conforms to Low Voltage Directive and EMI/RFI standards


​Repeatability​ ​± 0.5% of full scale
​Linearity ​1% of full scale prior to atmospheric correction (option)
​Drift ​Zero:    ± 2% of full scale/week
In the case of Auto Zero calibration, use for 500 ppm or less range
Span:    ± 2% of full scale/week
​Response Time ​1-15 sec electrical response
Within 10-30 seconds including replacement time of sampling gas
Gas replacement depends on the number of measuring components and measuring range
​Temperature ​23° to 113°F (-5° to 45°C)
​Pressure ​Less than 1.5 PSIG, went to atmospheric pressure
​Sample Flow ​1.0 SCFH (0.5 SLPM)
​Utility Gases ​Not Required
​Power ​100-240 VAC, 50/60 Hz (100 VA Max)
​Dimensions ​Rack Mount:    19″L x 5.22″H x 15.04″D
(48.3 x 13.3 x 38.2 cm)
Approximately 25 lbs (11.34 kg)
Wall Mount:     24″L x 24″H x 12″D
(61.0 x 61.0 x 30.5 cm)
Approximately 60 lbs​ (27.22 kg)
​Included I/O ​​4-20 mA (isolated) analog per measurement (or 0-1 VDC optional)
RS-485 MODBUS® RTU™ half-duplex serial communications
1 x system alarm, Form-C type, rated 1A / 24 VDC
1 x concentration alarms, Form-C type, rated 1A / 24 VDC
Range identification contact, Form-A type
More From Avensys

More Services

Our certified engineers and technicians can intervene from the initial consultation and planning stages, throughout the life of instruments and systems.
Happy Professional Heavy Industry Engineer Worker Wearing Uniform, and Hard Hat in a Steel Factory. Smiling Industrial Specialist Standing in a Metal Construction Manufacture.

Field & In House

Develop customized monitoring plans that address client's unique needs...

Start up

Start up & Commissioning is a critical phase in the life cycle of any project.

Integrated Systems

The benefits include improved performance, reduced costs, and increased reliability.


We believe that product training is essential for both our employees and our clients.