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5
Technical Data
Measurands
CO
2
Measurement principle
Working range
Accuracy at 25 °C and 1013 mbar
(77 °F and 14.69 psi)
T and p compensation
of the CO
reading
2
Initialisation time (power on)
Response time t
63
Temperature dependency, typ.
Residual pressure dependency
Calibration interval
Sampling interval
Pressure
Working range
Accuracy at 25 °C
Temperature dependency
Temperature
Working range
Accuracy at 25 °C
General
Digital interface (pin-selectable)
I²C
UART
Module control
Enable pin
Data ready pin
Supply voltage
Average current consumption for
supply voltage 5 V, typ.
Current profile for
supply voltage 5 V,
typical values
Electrical connection
Working and storage conditions
1) With data averaging, using default filter configuration.
2) The pressure dependency of a device without pressure compensation: 0.14 % of measured value / mbar.
3) Recommended under normal operating conditions in building automation.
User Manual EE895 Miniature Sensor Module for CO
Dual wavelength NDIR (non-dispersive infrared technology)
0...2 000 / 5 000 / 10 000 ppm
0...2 000 ppm
1)
0...5 000 ppm
0...10 000 ppm
With on-board sensors
< 1 s
140 s with measured data averaging (smooth output)
75 s without measured data averaging
± (1 + CO
, typ.
± 0.014 % of the measured value / mbar (ref. to 1 013 mbar)
2)
5 years
3)
User configurable from 10 s up to 1 h; factory setup = 15 s
700...1 100 mbar
typ.
± 2 mbar (20...80 % RH)
(77 °F),
± 0.015 mbar/K
-40...60 °C
typ.
± 0.5 °C
(77 °F),
Up to 100 kbit/s
9 600 Baud, 8 bits, no parity, 1 stop bit
Continuous operation / power down
Indication of valid data
3.3 - 5 V DC ± 5 %
1.6 mA at 15 s sampling interval
177 µA at 1 h sampling interval with standby between measurements
7 µA at 1h sampling interval with power down between measurements
0
Side plated contacts and solder pads, Ø 1 mm (0.04")
-40...60 °C
0...95 % RH (non-condensing)
700...1 100 mbar
, T and p
2
< ± (50 ppm + 2 % of the measured value)
< ± (50 ppm + 3 % of the measured value)
< ± (100 ppm + 5 % of the measured value)
concentration [ppm] / 1 000) ppm/°C (-20...45 °C)
2
(10.15...15.95 psi)
(-40...140 °F)
(± 0.9 °F)
6 mA
67 mA
Idle
IR Lamp pulse
Measurement
Standby / power off
300 ms
300 ms
Sampling intervall 15 s (configurable 10 s ... 1 h)
(-40...140 °F)
(10...16 psi)
170 μA
(-4...113 °F)
19
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