A12-17 Combustible Gas Detector

ATi’s A12-17 Combustible Gas Detector system offers the exclusive AutoTest feature, eliminating the need for frequent manual response checks, allowing for safer and more confident monitoring.

Reliable performance, unmatched security

ATi’s A12-17 Combustible Gas Detector system eliminates the need for frequent response checks with ATi’s pioneering AutoTest. This transmitter performs an automatic test using self-generated gas on the sensing element every 24 hours with the world’s only self-testing AutoTest gas module for complete peace of mind, allowing for safer and more confident monitoring.

The A12-17 combustible gas sensors are made up of two matched sensing elements, one active and one passive. Both are electrically heated and form two legs of a Wheatstone bridge circuit. When combustible gas contacts the sensor, the active element catalyzes the oxidation of gas, heating the active element and changing its resistance. The passive element remains unchanged, resulting in a change in the bridge circuit that is proportional to the gas concentration. As long as the active element remains in good condition, the gas sensor will respond rapidly to the presence of combustible gas. 

The Auto-Test gas sensor is a combination of a gas sensor and an electrochemical hydrogen gas generator integrated into an explosion-proof stainless steel housing. When activated by the electronic transmitter, the generator produces hydrogen that diffuses to the gas sensor through the flame arrestor protecting the sensor. If the gas sensor responds properly, the A12-17 Combustible Gas Transmitter will show a “Pass” indication. Should the sensor not respond properly, an “Auto Test Fail” message will activate at the gas transmitter and the 4-20 mA output from the transmitter will drop to 3 mA, providing for remote fault indication.

Features & specifications

  • Integral LCD Display
  • AutoTest feature every 24 hours
  • Auto-Test data log
  • Signal Simulation
  • Dual Condulet Option
  • Eliminates the need for frequent response checks

Applications

The A12-17 Combustible Gas Detector is available for a wide range of applications including:

  • Industrial plants
  • Petrochemical

Key benefits

  • AutoTest verification every 24 hours
  • Non-intrusive Calibration
  • Modular, plug-in design
  • Level of reliability beyond that of any other system

Downloads





VIEW ALL DOWNLOADS

Contact us

Our team of experts are on hand to deal with any queries regarding our products or services.

Get in touch

A team of experts, ready to help

A global company with a caring culture. We have a team of experts on hand to help with any product or support query you may have. Contact us and experience ATi’s exemplary customer support.

Get in touch

Industries

Catch up on the latest from ATi



News icon
News
Badger Meter Enhances Smart Water Capabilities With Acquisit…

Badger Meter continues to invest in its industry-leading smart water offerings. and is pleased to announce the acquisition of Syrinix, Ltd, a privately held provider of intelligent water monitoring solutions.

Read
News icon
News
Reduce excess chemical overfeed with the Q46S Residual Sulfi…

The removal of chlorine before discharge to the environment from clean water and also waste water effluent is common practice…

Read
News icon
News
Get Street Smart with ATi’s MetriNet street-level telemetr…

Water quality monitoring has just got smarter with ATi’s latest innovation, the exclusive smart multi-parameter, street-level telemetry bollard.

Read