Thermo Model 128

Fixed Gas Monitoring System

Thermo Scientific Model 128 - Fixed Gas Monitoring System

Thermo's Model 128 is a complete fixed gas monitoring solution with easy installation and setup. The wall mounted unit can monitor up to eight different sensors, and six different gas sensors are available.

The Model 128 fixed gas monitoring solution is designed for easy deployment, reliability, and low total cost of ownership. The wall mounted controller can monitor up to 8 individual sensors and features conveniences like auto setup, one person calibration, calibration reminders, and easy to follow instructions. Problems are indicated at a glance with a super bright LED array, and an LCD display provides real time measurements. The built in alarm sounds at 98 dB, and various internal programmable relays provide configurable alarm output options. The Model 128's wall mounted controller comes in either 115 or 230 VAC versions, and is available with or without an IS barrier.

The Model 128 uses intrinsically safe sensors for combustibles, O2, and various toxics. They are connected to the Model 128 via a digital connection. Each sensor features an output allowing easy networking of multiple sensors. Combustible sensors are mounted in an explosion proof housing and feature non intrusive calibration.


Thermo Model 128 Available Sensors and Ranges

Gas Formula Range Resolution
Oxygen O2 0 to 30 % Volume .1 % Volume
Carbon monoxide CO 0 to 500 ppm 1 ppm
Chlorine Cl2 0 to 10.0 ppm 0.1 ppm
Ammonia NH3 0 to 100 ppm 1 ppm
Combustible 0 to 100% LEL 1% LEL
Hydrogen Chloride HCL 0 to 30 ppm 0.1 ppm

Thermo Model 128 Ordering Instructions

A Thermo Model 128 fixed gas monitoring systems consists of a controller and at least 1 gas sensor from the options below. Up to any combination of 8 remote gas transmitters can be used with a single Model 128 controller.

Thermo Model 128 Controller

  • Part Number/Description
  • Cart
  • Price
  • 72-0024-03Model 128 controller1, 115 VAC
  • Order
  • Call for Price
  • 72-0024-04Model 128 controller1, 230 VAC
  • Order
  • Call for Price
  • 72-0024-01Model 128 controller1 with IS barrier, 115 VAC
  • Order
  • Call for Price
  • 72-0024-02Model 128 controller1 with IS barrier, 230 VAC
  • Order
  • Call for Price

Thermo Model 128 Sensors

  • Part Number/Description
  • Cart
  • Price
  • 67-0028-01Sensor for Model 1281, O2
  • Order
  • Call for Price
  • 67-0028-03Sensor for Model 1281, CO
  • Order
  • Call for Price
  • 67-0028-05Sensor for Model 1281, Cl2
  • Order
  • Call for Price
  • 67-0028-07Sensor for Model 1281, NH3
  • Order
  • Call for Price
  • 67-0028-14Sensor for Model 1281, HCl
  • Order
  • Call for Price
  • 67-0029-01Sensor for Model 12812, combustible
  • Order
  • Call for Price

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