Bacharach MGS-460 Gas Detector

Bacharach MGS-460 Gas DetectorThe Bacharach MGS-460 Gas Detector extends the flexibility of the MGS-400 series by incorporating a remote sensor head, allowing gas detection in confined or hard-to-reach spaces while maintaining a convenient interface point for wiring and communication.
Engineered for refrigeration safety, the MGS-460 supports a wide range of gases including halogenated refrigerants, CO₂, NH₃, O₂, CO, hydrocarbons (R-290, R-600) and NO₂. Pre-calibrated, plug-and-play sensor modules make replacement quick, with no need for calibration gas or specialist tools.
The unit combines digital (Modbus RTU) and analogue (configurable 4–20 mA/voltage) outputs for seamless integration into building management systems, refrigeration controls, or the Bacharach MGS-408 controller. Three onboard relays provide local control of fans, strobes, or shutdown equipment, while integrated audio/visual alarms ensure immediate local notification.
Its IP66 enclosure and low-temperature performance down to -40 °C make it ideal for machinery rooms, chiller plants, walk-in freezers, and other demanding environments. With support for Bluetooth app configuration, the MGS-460 offers a user-friendly, modern solution for achieving compliance with EN 378 and F-Gas Regulation while reducing downtime and maintenance costs.

Key Features

Remote Sensor Capability: Detect refrigerants in confined or inaccessible areas.

Analogue & Digital Outputs: 4–20 mA/voltage + Modbus RTU via RS-485.

Onboard Relays: Three SPDT relays for alarms, fault indication, or equipment control.

Integrated A/V Alarms: LED and buzzer comply with ASHRAE 15 / EN 378.

IP66 Enclosure: Built to withstand dust, moisture, and harsh environments.

Low-Temperature Performance: Operates reliably down to -40 °C.

Plug-and-Play Sensors: Pre-calibrated modules simplify installation and service.

Mobile App Support: Easy commissioning and maintenance via the MGS-400 app.

Gases and Ranges

Refrigerants: 1,000 ppm
CO₂: 5,000 / 10,000 / 20,000 / 30,000 / 40,000 / 50,000 ppm
NH₃: 100 / 1,000 / 5,000 / 100% LEL
O₂: 30 Vol%
CO: 500 ppm
Combustible gases – Semiconductor (R-290, R-600, R-50, R-600a, HC-12a, R-717): 5,000 ppm
Combustible gases – NDIR (R-600, R-50, R-290): 100% LEL
Combustible gases – Catalytic (R-600, R-50, R-290, R-717): 100% LEL
NO₂: 20 ppm

Status Indicator

Single tri-color LED (green, red, orange)

Buzzer

72 dB @ 10 cm

Output

Analog: Single configurable output (4–20 mA, 0–5 V, 0–10 V, 1–5 V, 2–10 V)
Digital: Modbus RTU via RS-485

Power Supply

24 V AC or DC (auto selecting), 4 W (max)

Relay

Three SPDT relays, fixed low / high / fault alarms
Rating: 1 A @ 30 VDC

Enclosure

IP66

Size (W × H × D)

General purpose (base): 6.5 × 6.5 × 3.4 in (165 × 165 × 87 mm)
Remote head: 4.5 × 5.4 × 2.7 in (115 × 136 × 68 mm)

Weight

Approx. 1 lb 11.7 oz (758 g)

Approvals

CE, UL / CSA, IEC EN 61010-1

Ambient Conditions

Temperature
Semiconductor: -40 to +122 °F / -40 to +50 °C
Electrochemical:
– NH₃ 100 / 1,000 ppm: -40 to +40 °C
– NH₃ 5,000 ppm: -20 to +40 °C
– CO 500 ppm: -40 to +50 °C
– NO₂ 20 ppm: -20 to +40 °C
– O₂ 30% Vol: -20 to +50 °C
Infrared: -40 to +122 °F / -40 to +50 °C
Catalytic Bead: -40 to +122 °F / -40 to +50 °C

Humidity
5 to 90 % RH, non-condensing

Pressure
23.6 to 32.5 in Hg / 800 to 1,100 mbar