ams Datasheet Page 1
[v1-00] 2015-Apr-01 Document Feedback
HLS-440P
Automotive Hydrogen Leak Sensor
The HLS-440P automotive hydrogen sensor monitors hydrogen
leakage concentrations of 0 - 10% in air. The design fulfills Zone
2 requirements according to ATEX 100a. The predicted
concentration is transmitted to the host via the CAN bus
interface or with PWM output.
Type A:
The sensor shall measure the hydrogen concentration in high
humidity conditions, e.g. in the exhaust of a fuel cell system, to
ensure compliance with defined upper thresholds.
Type B:
The sensor shall measure the hydrogen concentration under
ambient humidity conditions, to ensure compliance with
defined upper thresholds.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of HLS-440P, Automotive Hydrogen
Leak Sensor are listed below:
Figure 1:
Added Value of Using HLS-440P
Benefits Features
• High sensitivity over large
concentration range
• 0 – 10% H
2
in air or nitrogen
• Accuracy ±0.5% vol.
• Resolution 500ppm
• Low cross sensitivity
• Heated field-effect transistor technology
•No detection towards HC, H
2
S, N
2
, CO, CO
2
, NO
x
• Designed for humid environment
• Humidity influence <0.5% typical
• Operating humidity range 5–100% relative humidity
including condensation
• Fast response time
•Start-up time <5s
• Speed of response (t
90
) < 5s
• Speed of recovery < 5s
• CAN bus interface 500 kbit/s (ISO11898-2)
•PWM output (optional)
• Low power consumption • 70 mA (typical)
• Long-term stability and reliability
• ESD and EMC protection
• Operating temperature range –40ºC to 90ºC
• Operating pressure range 0.5 – 1.2 bar (absolute)
