HLS-440P B Model Information

General Description

The HLS-440P B is an automotive hydrogen sensor designed to monitor hydrogen leakage concentrations of 0-10% in air. It is designed to meet Zone 2 requirements according to ATEX 100a. The predicted concentration is transmitted to the host via the CAN bus interface or with PWM output.

Key Benefits & Features

Sensitivity and Accuracy

• High Sensitivity: Over a large concentration range.
• Concentration Range: 0% to 10% H₂ in air or nitrogen.
• Accuracy: ±0.5% volume.
• Resolution: 500 ppm.
• Low Cross Sensitivity: No detection towards HC, H₂S, N₂, CO, CO₂, NOₓ.

Environmental and Safety

• Humidity Influence: <0.5% typical.
• Operating Humidity Range: 5% to 100% relative humidity, including condensation.
• Fast Response Time: Start-up time <5 seconds.
• Speed of Response (t90): <5 seconds.
• Speed of Recovery: <5 seconds.
• Safety Integrity Level: Designed for SIL2 (IEC 61508) and ATEX 100a zone 2.
• Long-term Stability and Reliability: Expected lifetime of 10 years.
• IP6K7 and IP6K9K Qualified: Dust and water ingress protection.

Applications

The HLS-440P B is suitable for detecting hydrogen gas leaks in various applications, including:

• Fuel cell systems.
• Other in-process applications.

Block Diagram

The functional blocks of the HLS-440P B include:

• LDO Voltage Regulation
• EMC Filter Protection
• Overvoltage, Reverse Polarity
• Watchdog
• Connector
• Power Supply
• Timer
• Microcontroller
• Output Switch
• Heater Switch Resistor
• H-Sensor

Installation

The HLS-440P B is designed for process connection with metric straight screw thread with o-ring M14x1.5 in accordance with ISO 6149-3 (stud end) and to fit into ISO 6149-1. It can also be mounted on a holder for open-air installation.

Recommended O-ring

• Material: EPDM 70"Peroxide crosslinked" or FPM 75 (Viton).
• Dimensions: 11.3±0.2, 2.2±0.08 or 11.3±0.2, 2.4±0.08.
• Fixation Torque: 15 Nm (+10%-0%) according to ISO 6149-3.

Electrical Interface

Electrical Connector

• Connector Type: A2105404381 - Code A.
• Mating Connector: MQS 4-pin, TE Connectivity AMP p/n 1-967640-1 Code A.

Pin Assignment

TableCopy

CAN Bus Interface

• Physical Interface: Two-wire balanced.
• Bus Bit Rate: 500 kbit/s (ISO 11898-2).
• Type A: 120 Ohm CAN bus termination.
• Type B: No termination.

CAN Matrix HLS-440P

• First CAN Message: Sent 0.1s after start-up.
• Repetition Rate: 100ms ±2ms.
• First H₂ Concentration: Delivered after 5s.
• CAN Message IDs:Type A: 1592 (0x0638) and 1595 (0x063B).Type B: 1600 (0x0640) and 1603 (0x0643).

Specifications

Sensor Function

• Target Gas: Hydrogen (H₂).
• Concentration Range: 0% to 10% H₂ in air.
• Accuracy: ±0.5% volume.
• Resolution: 500 ppm.
• Speed of Response (t90): <5 seconds.
• Speed of Recovery: <5 seconds.
• Cross-sensitivity: None towards HC, H₂S, N₂, CO, CO₂, NOₓ.
• Humidity Correction: Type A: Subtract 0.6%, Type B: Subtract 0.3%.
• Start-up Time: 5 seconds.
• Expected Lifetime: 10 years.

Electrical

• Supply Voltage: 8.5V to 16V.
• Supply Current: 70 mA typical @ 13.8V and 20°C (increased current during start-up phase, avg. 200 mA during first 1s).
• CAN Interface: Version 2.0 ISO 11898.
• Connector: A2105404381 - Code A.
• Mating Connector: MQS 4-pin, AMP 1-967640-1 Code A.
• ESD/Reverse Polarity Protection: Yes.

Environmental

• Operating Temperature Range: -40°C to 90°C.
• Storage Temperature Range: -50°C to 95°C.
• Humidity: 5% to 100% including condensation.
• Pressure: 0.5 – 1.2 bar (absolute).
• EMC: Automotive requirements.

Mechanical

• Dimensions (L, Ø): L=93.5mm, Ø=30mm.
• Weight: 77g.
• Stud: M14x1.5 in accordance with ISO 6149-3.
• O-ring: ID: 11.3 ± 0.2 mm, recommended cord size: 2.2 ± 0.08 mm, alternative cord size: 2.4 ± 0.08 mm.
• Material: Stainless steel and PBT GF30.
• Filter Membrane: Pall SUPOR 450R, 0.45 μm.
• IP Code: IP6K7 and IP6K9K.

Handling Instructions

• Avoid Exposure to: Humidity (condensing conditions), dropping, dust, mechanical impact, electromagnetic radiation (RF fields, high magnetic fields).
• Storage and Transport: Keep the sensor within its original packaging (plastic cap and ESD protected bubble bag).
• Disassembly: Not allowed, except for the removal of the plastic cap directly before final installation.