HPS-100
Automotive Hydrogen Sensor
General Description
The HPS-100 is an automotive hydrogen sensor that monitors
hydrogen concentrations of 0 – 100 Vol%. The design fulfills
Zone 2 requirements according to ATEX 100a. The predicted
concentration is transmitted to the host via the CAN bus
interface or PWM.
Ordering Information
and
Content Guide
appear at end of
datasheet.
Key Benefits & Features
The benefits and features of HPS-100, Automotive Hydrogen
Sensor are listed below:
Figure 1:
Added Value of Using HPS-100
Benefits
• High sensitivity over large
concentration range
Features
• 0 – 100% H
2
in nitrogen
• Accuracy ±2% vol.
• Resolution ±0.5% vol.
• Heated field-effect transistor technology
• No detection towards HC, H
2
S, N
2
, CO, CO
2
, NO
x
• Humidity influence <1% typical
• Operating humidity range 5–100% relative humidity
including condensation
•
•
•
•
•
Start-up time <5s
Speed of response (t
90
) < 5s
Speed of recovery < 5s
CAN bus interface 500 kbit/s (ISO11898-2)
PWM output (on request)
• Low cross sensitivity
• Designed for humid environment
• Fast response time
• Low power consumption
• Long-term stability and reliability
• Safety integrity level and
explosion proof
• Long lifetime
• 70 mA (typical)
• ESD and EMC protection
• Operating temperature range –40ºC to 90ºC
• Operating pressure range 0.3 – 3 bar (absolute)
• Designed for SIL2 (IEC 61508) and ATEX 100a zone 2
• IP6K7 and IP6K9K qualified with expected lifetime of 5 years
ams Datasheet
[v1-00] 2015-Apr-06
Page 1
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HPS-100 −
General Description
Applications
Hydrogen gas measurement in fuel cell systems and other
in-process applications.
Block Diagram
The functional blocks of this device for reference are
shown below:
Figure 2:
HPS-100 Block Diagram
LDO Voltage Regulation
EMC Filter
Protection
Overvoltage, reverse polarity
Timer
μController
Watchdog
Output Switch
Connector
Power Supply
Heater Switch
Resistor
H
2
-Sensor
Page 2
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 −
Over view
Installation
The HPS-100 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 (port).
Recommended O-ring, 11.3±0.2, 2.2±0.08 or 11.3±0.2, 2.4±0.08
EPDM 70 “Peroxide crosslinked” or FPM 75 (Viton)
Note(s):
The O-ring is currently part of the delivery
Recommended torque for fixation: 15 Nm (+10% -0%) acc.
ISO 6149-3
Recommended orientation of the sensor, see below.
Figure 4:
Recommended Mounting Position of the Sensor
Page 4
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ams Datasheet
[v1-00] 2015-Apr-06
HPS-100 −
Electrical Interface
Electrical Interface
Electrical Connector
The sensor connector is a A2105404381 - Code A with mating
connector MQS 4-pin, TE Connectivity AMP p/n 1-967640-1
Code A.
Figure 5:
Pin Coding AMP A2105404381 - Code A
2
1
3
4
Figure 6:
Pin Assignment
Pin
1
2
3
4
Vcc
GND
Function
CAN – High
no termination resistor
CAN – Low
no termination resistor
ams Datasheet
[v1-00] 2015-Apr-06
Page 5
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