Gas Detectors

Chillgard® M-100

Chillgard® M-100

With its compact design and low-maintenance engineering, the Chillgard M-100 Refrigerant Sensor is easily mounted almost anywhere for trusted detection of halogenated refrigerant across a wide range of temperatures and humidity ranges—with a minimum detection level of 20ppm.
Chillgard® LE Photoacoustic Infrared Refrigerant Monitor

Chillgard® LE Photoacoustic Infrared Refrigerant Monitor

The Chillgard LE Photoacoustic Infrared Refrigerant Monitor is specifically designed for reliable detection of some of the most common refrigerants from up to four remote locations—with a minimum detection level of 20 ppm. Specifically designed to operate for months with virtually no zero drift.
Z-Gard® COmbo Gas Monitor

Z-Gard® COmbo Gas Monitor

A cost-efficient monitor for underground garages and ventilation control, the Z-Gard COmbo Gas Monitor uses an electrochemical sensor to detect carbon monoxide. The unit features local audio/visual alarm status indicators and it can be configured to interface with air-handling equipment to control air quality within a building. Additional remote sensors can be attached to the unit via the RS-485 network port, while a 4-20 mA output is proportional to the calibrated operating range.
TRIGARD® Gas Monitoring System

TRIGARD® Gas Monitoring System

Designed to meet a variety of demanding applications, from wastewater facilities, to light industry and commercial applications, the TRIGARD Gas Monitoring System features MSA's precision craftsmanship and detects chlorine, sulfur dioxide and other toxic and combustible gases. The adjustable-range unit also detects oxygen deficiency and enrichment. AC or DC powered, the system features a highly visible LCD screen and simple push-button calibration. Boasting sturdy NEMA 4X design and a single board, the unit offers multiple sensor mounting options. Our patented sensor disconnect-underpower feature allows all sensors to be replaced in hazardous areas without area declassification, while interchangeable smart sensors are pre-calibrated for installation right out of the box.
Chillgard® NH3 Gas Monitor

Chillgard® NH3 Gas Monitor

The Chillgard NH3 Gas Monitor is the economical choice for fast, reliable detection of parts-per-million (ppm) levels of ammonia, down to -40°C. Capable of measuring a 10 ppm leak, with full-range scale of 0-1000 ppm.
Discontinued S4000CH Combustible Gas Detector

S4000CH Combustible Gas Detector

The S4000CH Intelligent Sensor is a microprocessor-based transmitter designed for use with General Monitors industry-leading catalytic bead sensors. It monitors combustible gases and vapors within the lower explosive limit (LEL) and provides status indication and alarm outputs. Complies with ANSI/ISA 12.13.01-2000 performance requirements for combustible gas detectors. This product has been replaced by the S5000 Gas Monitor. See its many advantages here: msasafety.com/s5000.
Discontinued MSA S4000TH Hydrogen Sulphide Gas Detector Unit - front view

S4000TH H2S Gas Detector

The S4000TH Intelligent Gas Sensor is a microprocessor-based transmitter designed for use with General Monitors' thin film metal oxide semiconductor (TFMOS) sensors to detect H2S gas. The unit features one person calibration and can virtually self-calibrate by simply activating a magnetic switch and applying gas. It detects hydrogen sulfide in 0-20 ppm, 0-50 ppm or 0-100 parts per million (ppm) levels over a wide temperature range. This product has been replaced by the S5000 Gas Monitor. See its many advantages here: msasafety.com/s5000.
Discontinued IR4000S Single-Point Gas Monitor

IR4000S Single-Point Gas Monitor

The IR4000S Single-Point Monitor is a display and user interface for the IR400 point IR gas detector. The monitor allows local calibration and displays gas concentration. Relays are optional. The relays provide output for Alarm, Warn, and Fault conditions. This product has been replaced by the S5000 Gas Monitor. See its many advantages here: msasafety.com/s5000.
Discontinued IR4000M Multi-Point Gas Monitor

IR4000M Multi-Point Gas Monitor

The IR4000M Multi-Point Gas Monitor can be used as an integrated combustible gas detection system, with capacity to connect eight point IR or open path gas detectors and read their status with one command. The highest current % LEL among all connected detectors is shown continuously during normal operation. An extensive set of menus are easily navigated using a magnetic switch to request the status and configuration data stored by the IR4000M. This product has been replaced by the S5000 Gas Monitor. See its many advantages here: msasafety.com/s5000.
Discontinued Chillgard® RT Refrigerant Monitor

Chillgard® RT Refrigerant Monitor

Capable of detecting refrigerant gas down to 1ppm, the Chillgard RT Refrigerant Monitor is purpose-built to monitor up to eight remote areas — and is completely configurable to detect either a specific refrigerant or group of refrigerant gases. The Chillgard 5000 is the replacement for the Chillgard RT. See how easy it is to upgrade here.
Discontinued Ultima® X Series Gas Monitors with X3® Technology

Ultima® X Series Gas Monitors with X3® Technology

The ULTIMA X3 has been discontinued. Please see the ULTIMA X5000 as an alternative. The Ultima X Series Gas Monitors with X3 Technology bring the power of multi-sensing, signal boost and ModBus output to the Ultima X line of MSA gas monitors. The units are crafted from either stainless steel or NEMA 4X-rated plastic, and our patented SafeSwap sensor disconnect-underpower feature allows all sensors to be replaced in hazardous areas without area declassification. The interchangeable smart sensors eliminate the need for reconfiguration, while the use of one circuit board increases reliability. Each sensor can be placed up to 3,000 feet from the monitor, while the scrolling LCD screen displays sensor reading and gas type.
Discontinued Ultima® XL/XT Series Gas Monitors

Ultima® XL/XT Series Gas Monitors

These products have been discontinued. Please see the ULTIMA X5000 as an alternative. Engineered to provide cost-efficient gas detection, the Ultima XL/XT Series Gas Monitors are simply an outstanding choice. The units boast a hand-held HART port running over 4-20 mA output which provides convenient setup, calibration and diagnostics. The interchangeable smart sensors eliminate the need for reconfiguration, while local calibration employs LEDs and push-buttons. Indoors or outdoors, some of these explosion-proof models feature infrared technology that eliminates the need for frequent calibrations. Some units operations are based on dual-wavelength, heated-optics technology, which compensates for temperature, humidity and aging effects. The monitors use only one circuit board for increased reliability, and they're easy to install with two-piece field-wiring connectors.
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