MC2 Sensor with Electrochemical Sensor Element for Toxic Gases or Oxygen with Analog Output

Features

Internal functional control with integrated Watchdog
Easy maintenance and calibration by exchange of the sensor or by comfortable on-site calibration
High accuracy, selectivity and reliability
Low zero-point drift
Sensor with long life expectancy (depending on gas type)
Hardware and software according to SIL compliant development process
4–20 mA (or 2–10 V) analog output with selectable signal output for Special Mode (fault, maintenance, service etc.)
Reverse polarity protected, overload and short-circuit proof
IP65 protection (when installed)

Description

Overview:

Electrochemical sensor including digital value processing and integrated self-diagnosis, for the continuous monitoring of the ambient air to detect toxic gases or oxygen.

The intelligent MC2 Sensor for detection of toxic gases or oxygen monitoring includes an electrochemical cell and electronics with a measuring amplifier and a μController as well as a module with a terminal for the analog output and the external power supply. The μProcessor converts the sensor’s measuring signal into a linear 4–20 mA signal (or 2–10 V). All relevant data and measured values of the sensor are stored fail-safe in the internal memory of the μProcessor.

The maintenance of the device can be done either by simply exchanging the sensor or by using the integrated, comfortable calibration routine directly at the system.

The PolyGard®2 MC2 Sensor used to detect toxic gases or to monitor the oxygen content in the ambient air when an analog 4–20 mA (or 2–10 V) signal is required.

Electrochemical Sensor Specifications

ELECTRICAL
Power supply	18–29 V DC, reverse-polarity protect.;
Power supply	18–27 V AC (only for output signal 2–10 V)
Power consumption	23 mA, max. (0.6 VA for 24 V)
Analog output signal	Proportional, overload and short-circuit proof,
	load ≤ 500 Ω for current signal, ≥ 50 kΩ for voltage signal
	4–20 mA or 2–10 V = measuring range
	3–4 mA or 1.5–2 V = underrange
	> 20–21.2 mA or 10–10.6 V = overrange
	2 mA or 1 V = fault
	> 21.8 mA or 10.9 V = fault High
SENSOR ELEMENT
Gas type and measuring range	See Ordering Information
Measuring principle	Electrochemical
Poisoning	Electrochemical sensor elements are susceptible to poisoning by organic solvents.
RECOMMENDED STORAGE CONDITIONS
Storage temperature range1	See following tables
Storage time1	Ca. 6 months
Humidity range / pressure range	See following tables
PHYSICAL
Housing type P	Polycarbonate UL 94 V2
Housing colour	Similar to RAL 7035 (light grey)
Dimensions (Ø x H)	24 x 22 mm (0.94 x 0.87 in.)
Weight	Ca. 30 g (0.066 lb)
Protection class	IP65
Mounting	Screw mounting, external thread M25 x 1.5 mm
Wire connection	Screw-type terminal, 0.25–1.3 mm2, 3-pin
REGULATIONS
Directives	EMC directives 2014/30/EU,
	UL2075 (only for sensor MC2-X-E1110-E-X-P)
	CE, UKCA
	Compliance with:
	EN 378
	EN 45544-1, -3
	EN 50104 (for O2)
	EN 50271,
	EN 50545
	EN 61010-1:2010
	ANSI/UL 61010-1
	CAN/CSA-C22.2 No. 61010-1
Warranty	1 year on sensors (not if poisoned or overloaded)
OPTIONS
HOUSING TYPE A
Material / flammability classification	Polycarbonate / UL 94 V2
Housing colour	RAL 7032 (light grey)
Dimensions (B x H x D)	94 x 130 x 57 mm (3.7 x 5.1 x 2.2 in.)
Weight / package volume	Ca. 0,2 kg (0.4 lb) / ca. 4,5 l
Protection class	IP65
Mounting	Wall mounting
Pre-embossing for cable entry / sensor	6 x M20/M25
DISPLAY
LC Display	2 lines, 16 characters each, monochrome
Temperature range	-20 °C to +60 °C (-4 °F to 140 °F)
OPEN-COLLECTOR
Transistor output (2)	For horn (resettable) and warning lamp
Switching capacity	24 V DC / 50 mA (+ switching)