E+E EE871 Specifications

EE871

Digital CO2 Probe for Demanding Applications

The E+E CO2 probe EE871 is designed for use in harsh, demanding OEM applications. A multiple point CO2 and temperature adjustment procedure leads to excellent CO2 measurement accuracy over the entire temperature working range, ideal for use in agriculture or outdoors. EE871 incorporates the dual wavelength NDIR CO sensor, which automatically compensates for ageing effects and is highly insensitive to pollution.

The IP65 enclosure and the replaceable filter offer excellent protection in harsh, polluted environment. With a special filter cap, the EE871 can be employed in applications with periodical H2O2 sterilization. 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.

EE871

The measured data range of up to 5 % CO2 (50,000 ppm) is available on E2 digital interface and up to 1 % CO (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.

Typical Applications Key Features

Greenhouses and livestock barns Fruit and vegetable storage Hatchers and incubators Outdoor CO2 monitoring Data loggers and handhelds Pharma, Biotech (H2O2 sterilization)

Outstanding long-term stability

Temperature compensation

Very low current consumption

Modbus RTU or E2 interface

Auto-calibration

IP65 enclosure

Technical Data

Measured values

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

0...3 %:

Response time t 60 s without measured data averaging Temperature dependency 0...2000 ppm: (-20...45 °C)

0...10,000 ppm:

0...3 %:

0...5 %: Measurement interval adjustable from 15 s to 1 h

General

Digital interface Modbus RTU or E2 (details: www.epluse.com)

1) For averaging output

(77 °F...14,69 psi) 0...10,000 ppm: < ± (100 ppm + 5 % from the measured value)

0...5 %:

105 s with measured data averaging (smooth output)

(-4...113 °F) 0...5000 ppm: typ. ± (1 + CO

Supply voltage 4.75 - 7.5 VDC

< ± (1,5 % from full scale + 2 % from the measured value)

concentration [ppm] / 1000) ppm/°C

typ. -0,3 % from the measured value/°C

(Factory setting: 15 s)

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EE871

Average current consumption 2) 120 µA (at 1 h measurement interval)...4.3 mA (at 15 sec. measurement interval)

Gewicht: 30g

Current peak max. 350 mA for 0.05 s Housing / Protection class Plastic PC / Housing IP65 Electrical connection Connector M12 x 1

Cable length E2 interface max. 10 m

(32.8 ft)

Electromagnetic compatibility EN61326-1 (Industrial enviroment) EN61326-2-3 Operating conditions -40...60 °C Storage conditions -40...60 °C

2) The average current consumption depends on the measurement interval

(-40...140 °F) 0...100 % RH (non-condensing) 85...110 kPa (12,33...15,95 psi) (-40...140 °F) 0...100 % RH (non-condensing) 70...110 kPa (10,15...15,95 psi)

Connection Dimensions (mm/inch)

Modbus E2

1... +UB GND

2... B-RS485 +UB

3... A-RS485 DATA

4... GND CLOCK

Modbus E2

+UB GND brown B-RS485 +UB white A-RS485 DATA blue GND CLOCK black

Shielding grey

M12x1 flange coupling



M16x1.5

M12x1

Weight: 30g (1.06oz)

96 (3.78“)

(1.06oz)

Modbus Map

The measured values are saved as a 32Bit float value from 0x2D to 0x30. The factory setting for the Slave-ID is 246 as an integer 16Bit value. This ID can be customised in the register 0x00 (permitted values 1 - 247).

18.5 (0.73“)

FLOAT (read register): INTEGER (write register):

Coil / Register Numbers Data-Addresses Parameter name

30046 0x2D CO

30048 0x2F CO

Response time = 60s

Response time = 105s

For Modbus protocol setting please see Application Note (www.epluse.com/EE871).

Coil / Register Numbers Data-Addresses Parameter name

60001 0x00 Slave-ID

60002 0x01 RS485 Setting

60003 0x02 Measuring time interval

Operation outdoors

For outdoor applications EE871 must be used with the radiation shield order no. HA010507, which protects the device against rain, snow, ice, and solar radiation.

Ø105

174

Ø5

EE871 with

radiation shield

122

EE871

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