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1.4
Product Description
Beside CO
concentration up to 10.000 ppm, the EE895 measures temperature (T) and absolute
2
barometric pressure (p). The active pressure and temperature compensation minimizes the impact of
altitude and ambient conditions on the CO
The CO
, T and p measured data is available on I²C or UART digital interfaces. The solder pads, the
2
plated half-holes and the through-holes allow for various mounting options.
1.5
Operating Principle CO
The CO
measurement is based on the dual wavelength Non Dispersive Infra-Red (NDIR) technology
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which compensates for ageing effects, is highly insensitive to pollution and offers outstanding long term
stability.
The infrared detector 1 (IR-1) is tuned to 4.2 μm, which is the wavelenght absorbed by CO
detector 2 (IR-2) is tuned to 3.9 μm, which is not affected by any gas. For every single flash of the
infrared lamp (IR-L), the device calculates the CO
detectors IR-1 and IR-2. The measuring interval is user selectable (factory default: 15 s).
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Handling Instructions
EE895 is an ESD sensitive device and must be handled with corresponding precautions. Protect the
sensor outside the EPA (Electrostatic Protected Area) using ESD protective packaging.
The EE895 is packed in stacks of ESD trays with 50 pieces each. The tray dimension is 354.2 x 278.6 x
23.8 mm (13.94 x 10.97 x 0.94 inch).
Operating and storage conditions:
The EE895 housing and the circuit board shall not be exposed to unneccessary mechanical stress
during installation and operation. The forces exerted shall not exceed 50 N.
The sensor module deploys a fine dust filter for sensing element protection. If the EE895 is deployed in a
device which is designed for harsh environments, the device shall deploy a filter as well.
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Hardware
3.1
Dimensions in mm (inch)
Fig. 1 Dimensions
User Manual EE895 Miniature Sensor Module for CO
measured data.
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Measurement
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concentration from the outputs of both infrared
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-40...60 °C (-40...140 °F)
0...95 % RH (non-condensing)
700...1100 mbar (10.15...15.95 psi)
, T and p
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, the infrared
2
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