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Hydrogen Chloride Sensor (HCL Sensor) - HCL-A1

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• Range: 100ppm HCl limit of performance warranty
• Sensitivity: 80 to 130 nA/ppm in 25ppm HCl
• Response time t90: < 300s from zero to 25ppm HCl
• Resolution: < 1 RMS noise (ppm equivalent)
• Temperature range: -30 to +50°C
• Pressure range: 80 to 120 kPa
• Humidity range: 15 to 90% rh continuous
• Weight: < 6g

Model Number: HCL-A1
Data Sheet:

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Product Specification

HCL-A1 Hydrogen Chloride Sensor HCL Sensor Description
Alphasense is expanding its line of electrochemical Toxic Gas Sensors to address industry-specific requirements, including emissions monitoring, process safety, environmental monitoring and VOCs.

Hydrogen Chloride (HCl)/Hydrogen Bromide (HBr)
The HCL sensor also detects Hydrogen Bromide (HBr). These HCL sensors are zero biased for easier use.
Available in A and B series.

HCL-A1 Hydrogen Chloride Sensor HCL Sensor Schematic Diagram

HCL-A1 Hydrogen Chloride Sensor HCL Sensor PERFORMANCE
Sensitivity	nA/ppm in 25ppm HCl	80 to 130
Response time	t90 (s) from zero to 25ppm HCl	< 300
Zero current	ppm equivalent in zero air	< ±2.5
Resolution	RMS noise (ppm equivalent)	< 1
Range	ppm HCl limit of performance warranty	100
Linearity	ppm error at full scale, linear at zero, 40ppm HCl	0 to 6
Overgas limit	maximum ppm for stable response to gas pulse	200

HCL-A1 Hydrogen Chloride Sensor HCL Sensor LIFETIME
Zero drift	ppm equivalent change/year in lab air	nd
Sensitivity drift	% change/year in lab air, monthly test	nd
Operating life	months until 80% original signal (12 month warranted)	nd

HCL-A1 Hydrogen Chloride Sensor HCL Sensor ENVIRONMENTAL
Sensitivity @ -20°C	% (output @ -20°C/output @ 20°C) @ 25ppm HCl	65 to 90
Sensitivity @ 50°C	% (output @ 50°C/output @ 20°C) @ 25ppm HCl	102 to 120
Zero @ -20°C	ppm equivalent change from 20°C	< 0 to 4
Zero @ 50°C	ppm equivalent change from 20°C	< +1 to -5

HCL-A1 Hydrogen Chloride Sensor HCL Sensor CROSS SENSITIVITY
H2S sensitivity	% measured gas @ ppm H2S	< 250
NO2 sensitivity	% measured gas @ ppm NO2	< -150
Cl2 sensitivity	% measured gas @ ppm Cl2	< -20
NO sensitivity	% measured gas @ ppm NO	< 2
SO2 sensitivity	% measured gas @ ppm SO2	< 0.1
CO sensitivity	% measured gas @ ppm CO	< 0.1
H2 sensitivity	% measured gas @ ppm H2	< 0.1
C2H4 sensitivity	% measured gas @ ppm C2H4	< 0.1
NH3 sensitivity	% measured gas @ ppm NH3	< 0.1
CO2 sensitivity	% measured gas @ 5% CO2	< 0.1

HCL-A1 Hydrogen Chloride Sensor HCL Sensor KEY SPECIFICATIONS
Temperature range	°C	-30 to +50
Pressure range	kPa	80 to 120
Humidity range	% rh continuous	15 to 90
Storage period	months @ 3 to 20°C (stored in original container)	6
Load resistor	Ω (recommended)	10 to 33
Bias voltage	mV	not required
Weight	g	< 6

Matched Transmitter board for HCL-A1 HCL Sensor

4-20mA Digital Transmitter Board
• Factory calibration, custom-set for immediate use
• Digital zero, sensitivity and temperature compensation
• Digital and 4-20mA output
• Biased or unbiased operation
• Calibration and range change