Datasheet
v2.0 / Modification rights reserved
EE871
The E+E CO
2
probe EE871 is designed for use in harsh,
demanding OEM applications. A multiple point CO
2
and
temperature adjustment procedure leads to excellent
CO
2
measurement accuracy over the entire temperature
working range, ideal for use in agriculture or outdoors.
EE871 incorporates the dual wavelength NDIR CO
2
sensor, which automatically compensates for ageing
effects and is highly insensitive to pollution.
The IP65 enclosure and the replaceable PTFE filter offer
excellent protection in harsh, polluted environment. The
compact size, the M12 connector and the optional
mounting flange allow for fast probe installation or
replacement. With the optional radiation shield, EE871
can be also used outdoors.
The measured data range of up to 5 % CO
2
(50,000 ppm)
is available on E2 digital interface and up to 1 % CO
2
(10.000 ppm) is available on Modbus RTU interface.
An optional kit facilitates easy configuration and adjustment of EE871. The measurement interval can be set
according to the application requirements, by this the average current consumption can be reduced to
120 μA for battery-operated devices.
Digital CO
2
Probe for Demanding Applications
EE871
Greenhouses and livestock barns
Fruit and vegetable storage
Hatchers and incubators
Outdoor CO
2
monitoring
Data loggers and handhelds
Auto-calibration
Outstanding long-term stability
Temperature compensation
Very low current consumption
IP65 enclosure
Modbus RTU or E2 interface
Typical Applications Key Features
EE871
Measured values
CO
2
Measuring principle Dual wavelength (non-dispersive infrared technology) NDIR
Measurement range 0...2000 ppm: < ± (50 ppm + 2 % from the measured value)
Accuracy at 25 °C and 0...5000 ppm: < ± (50 ppm + 3 % from the measured value)
1013 mbar
1)
(77 °F...14,69 psi) 0...10,000 ppm: < ± (100 ppm + 5 % from the measured value)
0...3 %:
< ± (1,5 % from full scale + 2 % from the measured value)
0...5 %:
Response time t
90
105 s with measured data averaging (smooth output)
60 s without measured data averaging
Temperature dependency 0...2000 ppm:
(-20...45 °C)
(-4...113 °F) 0...5000 ppm: typ. ± (1 + CO
2
concentration [ppm] / 1000) ppm/°C
0...10,000 ppm:
0...3 %:
typ. -0,3 % from the measured value/°C
0...5 %:
Measurement interval adjustable from 15 s to 1 h
(Factory setting: 15 s)
General
Digital interface Modbus RTU or E2 (details: www.epluse.com)
Supply voltage 4.75 - 7.5 VDC
Technical Data
1) For averaging output
154