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Midas-M Side View


Fixed extractive, 4-in-1 multi-gas detector. The Midas®-M is a Fixed Extractive Single Point with 4-in-1 Multi-Gas Detector to detect more than 30 gases - precisely, easily, quickly, that draws a sample locally or from a remote point to a sensor cartridge that is located inside the detector's chassis. A wide range of toxic, flammable and oxygen gas sensor cartridges is available that enable the detection of gases used or generated in the Semiconductor and other manufacturing industries.

Check Sensor Specifications below for all Sensor Options

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  • Features
  • Specifications
  • Sensor Specs
  • PDF Download


  • Over *33 gases available with 2 year warranty : 17 gases available at launch
  • 4-in-1 multi smart sensor cartridge with on board * ‘e-calibration’ certificate
  • Modular design for easy to use and service (front, pump, sensor cartridge, main and base)
  • 3 built in relays (Form C) for Alarm 1, 2 and Fault
  • Power over Ethernet (PoE) communication
  • Keypad interface and remote web browser interface
  • Factory-calibrated sensors to reduce need for frequent gas testing
  • Isolated 0-21 mA analog output with fault and event reporting
  • Modbus/TCP Ethernet for easy connectivity to all control and alarm systems ports for control connectivity and service interaction
  • Robust extractive pump system (2 year lifetime) sampling up to 100 feet




136 mm (H) x 83 mm (W) x 152 mm (D)

Weight - Transmitter

1.3 kg

Weight - Cartridge

0.17 kg ~ 0.22 kg dependent on sensor type

Optional Relay Dimension

Size: 137 mm (H) x 84 mm (W) x 41 mm (D)

Weight: 0.31 kg

Operating Voltage

24 VDC Nominal, -15 to 10% (20.4 VDC to 26.4 VDC)

Operating Voltage with Power Over Ethernet (PoE)

48 VDC PoE (IEEE 802.3af compliant)

Transmitter unit (normal condition)

Typ. 5 W

Transmitter unit (full load condition)

≤ 11.45 W

Transmitter with Optional Relay

≤ 12.9 W

Visual Outputs

Alarm, Power, Fault LEDs, and LCD with all the gas readings and events.

LEDs: Power (Green), Alarm 1 (Red), Alarm 2 (Red), Fault (Yellow)

Relays in Transmitter

(3) Relays for Alarm 1, Alarm 2 and Fault rated 1.0 A @ 30 Vdc or 0.5 A @ 125 Vac

Max 10 uA @ 10 mV minimum, configurable as normally open or closed, latched or unlatched

Relays in Optional Relay

8 relays for Alarm 1 and Alarm 2 of each channel and a relay for common fault rated 1.0 A @ 30 Vdc or 0.5 A @ 125 Vac

Max 10 uA @ 10 mV minimum, configurable as normally open or closed, latched or unlatched

Analog Outputs

3 wire sink, 3 wire source, or 4 wire fully isolated; 0 mA to 21 mA for each channel

Digital Communications

Modbus/TCP Ethernet/Power over Ethernet (PoE)

Flow Rate

600 mL/min

Transport Time

2 seconds to 25 seconds maximum

Sample Line Tubing

3.18 mm ID x 6.35 mm OD

Tubing Length

Up to 30 m with FEP tubing

Exhaust Line Tubing

4.76 mm ID x 6.35 mm OD

Exhaust Length

Up to 30 m

Ambient Port

Inline air filter required

Operating Temperature

0°C to 40°C

4-20 mA Wiring Requirement

2 wire, 14 AWG maximum

Digital Wiring Requirement

CAT5 Cable or equivalent: RJ45 connector

Instrument Display

4-digit alphanumeric display with separate units, concentration bar graph for each channel and other icon-driven indicators

4 button interface keypad

Remote Display

Internet browser access via Ethernet


Wall-mounted using pre-drilled holes on chassis. Options for DIN rail


Cover: Plastic (Polycarbonate)

Chassis/Mounting bracket: Zinc plated steel

Red frame: Liquid coated aluminum


Transmitter Unit: 1 year

Sensor Cartridge: 2 years

Sensor Specs

Gas Range
Hydrogen Chloride (HCl) 0-8 ppm
Boron Trichloride (BCl3) 0-8 ppm
Dichlorosilane (SiH2Cl2) 0-8 ppm
Hydrogen Bromide (HBr) 0-8 ppm
Silane (SiH4) 0-20 ppm
Disilane (Si2H6) 0-20 ppm
Hydrogen (H2) 0-1000 ppm
Chlorine (Cl2) 0-2 ppm
Ammonia (NH3) 0-100 ppm
Carbon Monoxide (CO) 0-100 ppm
Phosphine (PH3) 0-1200 ppb
Ozone (O3) 0-0.4 ppm
Oxygen (O2) 0-25% v/v
Sulfur Dioxide (SO2) 0-8 ppm
Hydrogen Fluoride (HF) 0-12 ppm
Boron Trifluoride (BF3) 0-8 ppm
Tungsten Hexafluoride (WF6) 0-12 ppm

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