HLS-442 Datasheet, PDF (1/22 Pages) ams AG – Automotive Hydrogen Leak Sensor

HLS-442
Automotive Hydrogen Leak Sensor
General Description
The HLS-442 automotive hydrogen leak sensor monitors
hydrogen concentrations of 0 – 4.4% in air. The sensor is a leak
sensor developed in accordance to IEC 61508 (SIL2) and
explosion protected according to ATEX 100a. The predicted
concentration is transmitted to the host via the CAN bus
interface. HLS-442 utilizes self-calibration that is performed
automatically when operated in air with normal hydrogen
concentration. Therefore, the HLS-442 should not continuously
be operated in elevated background levels of
hydrogen.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Added Value of Using HLS-442
Key Benefits & Features
The benefits and features of HLS-442, Automotive Hydrogen
Leak Sensor are listed below:
Benefits
• High sensitivity and excellent
selectivity to hydrogen gas
• Low cross sensitivity
• Fast response time
• Low power consumption
• Long-term stability and reliability
• Safety integrity level and explosion
proof
• Long lifetime
Features
• 0–4.4% H₂ in air
• Accuracy ±3000 ppm at normal operation
• Heated field-effect transistor technology
• No detection towards HC, H₂S, N₂, CO, CO₂, NO_x, H₂O
• Humidity influence not detectable
• Start-up time <5s
• Speed of response (t₉₀) < 2s
• Speed of recovery < 10s
• CAN bus interface 500 kbit/s (ISO11898-2)
• PWM output (on request)
• 75 mA (typical)
• ESD and EMC protection
• Operating temperature range –40ºC to 85ºC
• Designed for SIL2 (IEC 61508) and ATEX 100a zone 2
• IP67 qualified with expected lifetime of 10 years
ams Datasheet
[v1-00] 2015-Mar-30
Page 1
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