Molecular Hydrogen (H ) Gas Sensor [Calibrated]; Specifications - Libelium Smart Cities PRO Technical Manual

5.17. Molecular Hydrogen (H

5.17.1. Specifications

Gas: H
2
Sensor: 4-H2-1000
Performance Characteristics
Nominal Range: 0 to 1000 ppm
Maximum Overload: 2000 ppm
Long Term Output Drift: < 2% signal/month
Response Time (T90): ≤ 70 seconds
Sensitivity: 20 ± 10 nA/ppm
Accuracy: as good as ±10 ppm* (ideal conditions)
Operation Conditions
Temperature Range: -20 ºC to 50 ºC
Operating Humidity: 15 to 90%RH non-condensing
Pressure Range: 90 to 110 kPa
Storage Temperature: 0 ºC to 20 ºC
Expected Operating Life: 2 years in air
Sockets for Waspmote OEM:
SOCKET_1
•
SOCKET_3
•
SOCKET_5
•
Sockets for Plug & Sense!:
SOCKET_B
•
SOCKET_C
•
SOCKET_F
•
Average consumption: less than 1 mA
* Accuracy values are only given for the optimum case. See the "Calibration" chapter in the Gases PRO Technical Guide
for more detail.
The electrochemical sensors must be always powered on in order to get optimum measurements. This implies
a power consumption, however it improves the performance of the sensor. This should also be applied when
entering sleep modes so the sensor is not powered off selecting the proper sleep option.
Calibrated gas sensors are manufactured once the order has been placed to ensure maximum durability of the
calibration feature. The manufacturing process and delivery may take from 4 to 6 weeks. The lifetime of calibrated
gas sensors is 6 months working at maximum accuracy. We strongly encourage our customers to buy extra gas
sensors to replace the original ones after that time to ensure maximum accuracy and performance.
) Gas Sensor [Calibrated]
2
-68-
Figure: Image of the Molecular Hydro-
gen Sensor mounted on its AFE module
Sensors
v7.3