Installation Instructions for the HLD Series Hydrogen Leak Detector

1.0 General Information

The Honeywell Hydrogen Leak Detector is a thermal conductivity-based hydrogen gas sensor offering high reliability, stability, and resistance to chemical poisoning. It is designed for detecting hydrogen leakage in various applications.

2.0 Use of the Hydrogen Leak Detector Sensor

The Honeywell Hydrogen Leak Detector is engineered to provide ppm-level hydrogen gas detection in a clean air environment with high accuracy across a wide range of temperatures and humidity.

3.0 Calibration/Compensation

The Hydrogen Leak Detector is calibrated for H₂ sensitivity over temperature. Integrated temperature, humidity, and pressure sensors provide compensation/correction for sensor output against environmental changes. These measurements are also accessible via the CANbus message.

4.0 Installation

Mount the sensor using two mounting bushings and two grade 8.8 M6 bolts. The mounting tabs accommodate various bolt head styles. Torque mounting bolts to 8 Nm ±2 Nm.

The sensor should be mounted with the gas entry port facing downwards to prevent water pooling on the gas membrane or dust accumulation. If downward orientation is not possible, position the sensor on its side to minimize water or dust collection on the membrane, which could impede gas passage.

5.0 Sensor Diagnostics

The sensor provides the following diagnostic indicators:

• Voltage Outside Operating Range (High/Low)
• H₂ Sensor Error
• Temperature Outside Operating Range (High/Low)
• Humidity High Error
• Pressure Outside Operating Range (High/Low)

Table 1. Specifications

Table 2. Installation Specifications

6.0 Faults

6.1 Fault IDs

• Severity Level options: Protect, Warning, Replace, Stop Now
• Light Options: Off, On
• Flash Options: Slow, Fast, NoFlash

Table 3. Serviced Fault from Boot Block

Table 4. Serviced Faults Added to Applications

• Faults are reported immediately when triggered using DM1.
• Faults shall report every 1 second while active.
• Once all faults are removed/recovered, sensors stop transmitting the DM1 message.

6.2 Fault Messages

DM1 (J1939-73 Standard)

The DM1 message reports error characteristics: Severity, Light, Flash, and FMI are used to describe the error. The DTC identifies the exact error, and occurrence reports how many times it has occurred.

PDU 0XFECA/65226

DM3 (J1939-73 Standard)

The DM3 message is used to clear stored and active DTCs.

PDU 0XFECC/65228

7.0 HLD Outmessages

• CAN Identifier per J1939
• Baud Rate: 250 kbps or 500 kbps
• 120 Ohm termination resistors required on both ends of BUS

PDU 0XFF10/65296

Temperature: (±125°C)
Temperature (°C) = (int8_t)DegC

Humidity: (0...100%RH)
Humidity (%rH) = (uint8_t)RH*0.5

Pressure: (0.45...1.1 Bar)
Pressure (Bar) = (uint8_t)Bar*0.004+0.45

Hydrogen: (-5k...200k ppm)
Hydrogen (ppm) = (int16_t)PPM*50

Error: Bit 7: Error Light. Error is set if any of the fault is set and the corresponding fault Light is "ON", refer Table 4.

Counter: Rolling Counter (0-255). Counter is incremented by 1 for every message transmitted. The receiver could track for missing messages through the counter.

Example: Broadcast Normal Operation at 23°C (0x17h=23d), 55% Rh(0x6E), 0.970Bar (0x82), 1800ppm (0x0024), one or more Faults are set.

ID: 8FF10E4x
Data: 17 6E 82 24 00 01 74 FF

Figure 1. Product Dimensions (mm)

A diagram showing the product dimensions of the HLD Series Hydrogen Leak Detector. Key dimensions include:

• Overall height: 72.63 mm
• Overall width: 77.5 mm
• Mounting hole spacing (width): 62 mm
• Mounting hole spacing (height): 44.5 mm
• Mounting hole diameter: 2x 18.6 mm
• Sensor body width: 44.5 mm
• Gas entry port indicated
• Connector dimensions: 21.9 ±0.1 mm width, 4x R4.5 ±0.2 mm radius for mounting holes.
• Connector pinout details: Pin 1 (Power input), Pin 2 (Ground), Pin 3 (CAN H), Pin 4 (CAN L).
• Connector dimensions: 9.9 -0.15 mm height, 5.93 ±0.1 mm width.

Table 5. Pin Out

8.0 Additional Sensor Installation Notes

• A. Orientation: While the H₂ sensor is not sensitive to orientation, pointing the gas port downwards prevents fluid pooling on the membrane. Positioning the gas port on its side is an alternative to prevent fluid/debris collection on the gas port surface.
• B. CAN Bus: A 120 Ohm termination resistor is required on both ends of the CAN Bus.
• C. Flame Suppressor: The sensor is equipped with a Flame Suppressor, intended to contain internal flame/explosions and prevent initiating a flame/explosion in the surrounding environment.
• D. Damage: Opening the device or damaging the flame suppressor will compromise its flame containment performance.
• E. Chemical Contact: The H₂ gas sensor is highly sensitive. Avoid close contact with volatile chemicals such as solvents, ketones (acetone), aldehydes (formaldehyde), alcohols (ethanol, isopropanol), and aromatic compounds (toluene, glycol ester).
• F. Outgassing: These chemicals are often found in epoxies, glues, and adhesives and can be outgassed during baking/curing processes.
• G. Acids: Minimize or avoid exposure to acids like Hydrochloric, Sulfuric, and Nitric.
• H. Other Chemicals: Minimize or avoid contact with Ketenes, Ammonia (NH₃), Hydrogen Peroxide (H₂O₂), and Ozone (O₃).
• I. Temperature Range: The H₂ sensor has been evaluated for a service temperature range of -40°C to 85°C.
• J. Repairability: H₂ sensors are not repairable. Faulty products must be returned to the manufacturer via the RMA process.
• K. Ambient Air Composition: The H₂ sensor is configured for ambient air. Typical ambient air composition includes: Nitrogen (78.084%), O₂ (20.946%), Argon (0.0934%), Carbon Dioxide (0.036%).
• L. Deviation: Sensor output will be affected if the ambient air composition deviates from its nominal composition.

Warranty/Remedy

Honeywell warrants its manufactured goods to be free from defective materials and faulty workmanship during the applicable warranty period. The standard Honeywell product warranty applies unless otherwise agreed in writing. Honeywell will repair or replace, at its option, any defective items found by Honeywell's sole discretion, without charge, if returned during the warranty period. This is the buyer's sole remedy and is in lieu of all other warranties, expressed or implied, including merchantability and fitness for a particular purpose. Honeywell shall not be liable for consequential, special, or indirect damages.

Honeywell may provide information or engineering support through its personnel, literature, and website. However, it is the buyer's responsibility to determine the suitability of Honeywell products for the buyer's requirements.

Specifications are subject to change without notice. Information provided is believed to be accurate, but Honeywell assumes no responsibility for its use.

Warnings

Personal Injury

DO NOT USE these products as safety or emergency stop devices, or in any application where product failure could result in personal injury. Failure to comply with these instructions could result in death or serious injury.

Misuse of Documentation

The information in this product sheet is for reference only. Do not use this document as a product installation guide. Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury.

For More Information

Honeywell Sensing Solutions provides worldwide customer service through a network of sales offices and distributors. For application assistance, current specifications, pricing, or the nearest Authorized Distributor, visit the Honeywell website or call:

• USA/Canada: +1 302 613 4491
• Latin America: +1 305 805 8188
• Europe: +44 1344 238258
• Japan: +81 (0) 3-6730-7152
• Singapore: +65 6355 2828
• Greater China: +86 4006396841

Honeywell Sensing Solutions
830 East Arapaho Road
Richardson, TX 75081
www.honeywell.com