OLCT 20 - OLC 20

The OLC(T) 20 Series of gas detectors are designed for indoor or outdoor facility monitoring and other applications to accommodate your gas detection requirements at a reasonable price.

OLC(T) 20 Detector
The new generation of OLC 20 combustible sensors are unaffected by poisons. The units provide extremely quick response times and complete reliability. They can be fitted on a housing with a M25 or 3/4" NPT thread.

The stainless steel detector provides protection and resistance to corrosive agents. Classified IP 66, they are resistant to dust and water ingress. The precalibrated sensors of the OLCT 20 can be disconnected by turning the head of the unit. These “smart” sensors can be calibrated on a work bench, outside hazardous areas.

Technical Specifications

Detectors	OLCT 20		OLC 20
Type	XP transmitter	IS transmitter	XP detector
Gas detection principle	Catalytic/ Electrochemical	Electrochemical	Catalytic
Detected gases	Flammable, toxics and oxygen	Toxics and oxygen	Flammable
Measuring range	See chart inside
Sensor housing	Stainless steel type 316 L
Precalibrated sensor	yes	yes	no
Power supply at the detector	15 to 30 VDC (catalytic) 15 to 30 VDC (chemical)	10 to 26 VDC	Depending on the detector
Maximum power consumption	100 mA (catalytic) 25 mA (chemical)	25 mA	Depending on the detector
Output signal	4-20 mA	4-20 mA	Wheatstone bridge
Load impedance	250 Ω (catalytic) Depending on power supply (chemical)	47 Ω max	Not applicable
Wiring	3 reinforced wires (catalytic) 2 reinforced wires (chemical)	2 reinforced wires	3 reinforced wires
Loop impedance with ISC monitor	32 Ω (catalytic) (1 km with 1,5 mm²) 128 Ω (chemical) (4 km with 1,5 mm²)	32 Ω (1 km with 1,5 mm²)	32 Ω (catalytic) (1 km with 1,5 mm²)
Wiring connection	Delivered with a 6mm-diameter cable
Fastening	M25 thread to screw or 3/4’’ NPT	M25 thread to screw or 3/4’’ NPT	M25 thread to screw With a stirrup or 3/4’’ NPT
Ingress protection	IP 66	IP 66	IP 66
Certification	EEx d IIC T6 II 2 GD INERIS 01 ATEX 0004X	EEx ia IIC T4 II 1 GD INERIS 01 ATEX 0004X	EEx d IIC T6 II 2 GD INERIS 01 ATEX 0004X
CEM mark	EN 50270	EN 50270	EN 50270
Weight	800 gr		800 gr
Dimensions	L 130 x D 60	L 130 x D 60	L 130 x D 60
Operating temperature (for electronic)	-25°C to +60°C	-25°C to +60°C	-25°C to +70°C

ZONE ATEX 0 OU 1