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4-20mA Analogue Transmitter Board Alphasense B Type Toxic & O2-A2 O2 Sensors - Analogue Transmitter

? Factory calibration, custom-set for immediate use
? Wide operating voltage range
? Low RFI susceptibility
? Output? Type:? 4 mA to 20 mA 2-wire loop powered?
? Ambient temperature:? -30 to 55℃
? Ambient humidity: 0 to 95% (non-condensing)?

Model Number: Analogue Transmitter
Data Sheet:

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Product Specification

Alphasense 4-20mA analogue transmitters offer the following features:

? Factory calibration, custom-set for immediate use
? Wide operating voltage range

? Low RFI susceptibility

Alphasense 4-20 mA analogue transmitter boards provide a cost effective way for Original Equipment Manufacturers to engineer transmitter heads for fixed installation systems. The range of sensors are shown below. Transmitters are supplied with pre-calibrated sensors.

The 4-20 mA output signal performance is as shown on individual sensor data sheets.

To allow OEMs to distinguish their product from other offerings, the sensor to gas aperture design is left to the OEM to execute.

Optional fitting kit and connector/leads are available on request.

Transmitter Board and Sensors

GAS	SENSOR TYPE B	MAX CONCENTRATION (ppm)
Carbon Monoxide	CO-BF	5,000
	CO-B1	5,000
	CO-BX	2,000
Hydrogen Sulfide	H2S-B1	200
	H2S-BH	50
	H2S-BE	2000
Sulfur Dioxide	SO2-BF	100
Sulfur Dioxide	SO2-BE	2,000
Nitrogen Dioxide	NO2-B1	20
Chlorine	CL2-B1	20
Hydrogen Cyanide	HCN-B1	100
Hydrogen Chloride	HCL-B1	20
Oxygen	O2-A2	15-25% O2 (standard)

4-20mA Analogue Transmitter Board INPUT
Type:	3-electrode gas sensor: O2 or B series toxic
Range:	See table (over)
Power-off state:	Shorting FET connects working to reference electrode
Bias:	Zero bias only
Temperature compensation:	None
4-20mA Analogue Transmitter Board OUTPUT
Type:	4 mA to 20 mA 2-wire loop powered
Output range:	3.8 to 42mA
Supply voltage:	+7.5 to 35VDC
Accuracy:	See sensor specification
Resolution:	±0.25% Full Scale
Sensor over-range:	> 20mA
Supply voltage stability:	±0.2% V_supply
Maximum loop resistance:	825 @ 24VDC
Protection:	Reverse polarity diode
Power and 4-20mA connection:	2-Pin MOLEX plug (Ref. 22-27-2021)
4-20mA Analogue Transmitter Board ENVIRONMENT
Ambient temperature:	-30 to 55°C
Ambient storage:	-30 to 60°C
Ambient humidity:	0 to 95% (non-condensing)
Coating:	Conformal spray coated