MSR ADT-23 Combustible Gas Transmitter

MSR ADT-23 Combustible Gas Transmitter

The MSR PolyGard ADT-23 is a fixed transmitter for continuous monitoring of combustible gases and vapours in ambient air.

  • Digital processing with temperature compensation
  • Gas- and range-specific sensor configuration
  • Selectable (0) 4–20 mA or (0) 2–10 V DC analogue output
  • RS-485 interface for compatible communication protocols
  • Optional two relays with adjustable switching thresholds
  • Calibration routine with controlled access

Fixed Monitoring of Combustible Gases and Vapours

The MSR PolyGard ADT-23 continuously measures a specified combustible gas or vapour in ambient air. Its electronics process the sensor signal, apply temperature compensation and transmit the measured value to a compatible gas controller, building-management system or automation system.

ADT-23 is a configurable product family rather than one universal detector. The target gas, measuring range, sensing technology, output, relay requirement, housing and installation arrangement must be selected for the actual application.

Model-status check: ADT-23 belongs to an earlier MSR product generation and is not shown among MSR’s current product series. Confirm availability, spare-sensor support and the suitable present-day alternative before specifying it for a new project.

ADT-23 Functions

FunctionADT-23 provisionSelection consideration
Measurement Continuous monitoring of ambient air for combustible gases or vapours Specify the exact gas and required measuring range
Signal processing Digital measured-value processing with temperature compensation Confirm performance for the site temperature and environment
Current output Selectable (0) 4–20 mA Match the controller input range and fault-signal behaviour
Voltage output Selectable (0) 2–10 V DC Confirm cable length, common reference and controller compatibility
Digital communication RS-485 interface for compatible protocols Confirm protocol, addressing and controller generation
Local switching Two adjustable relays available as an option Define alarm thresholds, relay logic and connected load
Calibration Calibration routine with controlled access Plan test gas, regulator, adaptor and calibration interval

Select the Required Configuration

Selection itemInformation requiredWhy it matters
Target gas or vapour Exact chemical name and expected background gases Determines sensor suitability, calibration gas and cross-sensitivity review
Measuring range Required %LEL or other specified engineering range Must match the hazard assessment and controller scaling
Installation area Room type, gas source, ventilation and classified-area status Determines location, enclosure and certification requirements
Signal 4–20 mA, voltage or RS-485 Must match the controller, PLC or building-management system
Alarm outputs Remote controller alarms or optional local relays Defines shutdown, ventilation and audible or visual warning actions
Environment Temperature, humidity, condensation, dust, chemicals and washdown exposure Affects sensor life, enclosure selection and maintenance frequency
Service access Calibration clearance and safe access to the sensing point Allows routine bump testing, calibration and sensor replacement

Output and System-Integration Guide

Connection methodSuitable useCheck before ordering
4–20 mA Conventional gas controller, PLC or remote analogue input Loop arrangement, supply, scaling, cable and fault-current interpretation
2–10 V DC Compatible building controls and voltage-input systems Shared reference, input impedance, distance and electrical noise
RS-485 Multi-point digital gas-detection or automation network Protocol, baud rate, address, termination and controller compatibility
Optional relays Local alarm, ventilation or interlock command Contact rating, fail-safe logic, alarm level and reset sequence

MSR Gas-Detection Support in Malaysia

Seacom Process Instruments supplies and supports MSR fixed gas-detection equipment in Malaysia. Our team can assist with target-gas selection, measuring range, detector quantity and location, controller architecture, analogue or RS-485 integration, alarm outputs, commissioning and maintenance planning.

For an existing ADT-23, send clear photographs of the complete product label, sensor information, controller model and wiring. For a new application, provide the target gas, room layout, possible leak sources, ventilation arrangement, classified-area status, required alarm actions and connection to the PLC or building-management system.

Explore MSR gas-detection products   View the MSR gas alarm system

Need help selecting the correct gas detector? Send Seacom the gas name, required range, site conditions, controller details and alarm requirements. We will help check the suitable transmitter and system arrangement.

Download

  MSR Catalogue   (6.97M)


Specific References

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