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Laboratory Electronics

CARBON DIOXIDE CONCENTRATION METER EE-80


  • function: meter of toxic gases concentration in the air
  • measurement: CO2 concentration (carbon dioxide)
  • measurement: air temperature and humidity (optional)
  • measurement method: NDIR
  • analogue outputs: 4..20 mA, 0..5 V, 0..10 V
IGM-0171

Description

Device series EE-80 is used for measurement of carbon dioxide (CO2) concentration content in the air. Additionally, the device measures air temperature (T) and optionally air relative humidity (RH).

It is a stationary device, of small size, powered from an outside source. It is characterized by a modern construction using NDIR method (non-dispersive infrared method of not scattering an infrared stream). It is relays on measurement of attenuation of infrared radiation of a defined wave length put through the measured gas, which is suppressed depending on the carbon dioxide content in the examined gas. The NDIR method assures accurate and stable measurement result as well as failure-free work for many years.

Scope of example meter use:

  • CO2 concentration measurement in the mushroom-growing halls,
  • control of gas emission in the industry,
  • monitoring for supervision purposes,
  • ventilation system work control in various objects.

Versions, installation


Obudowa Schemat połączeń

The device has analogue outputs of a measurement signal: 4..20 mA, 0..5 V or 0..10 V and optionally a measurement result display. It is produced in a casing which allows on easy assembly / disassembly and a service exchange of the broken device to a new one. The device is made in few versions, that are a mix of possibilities mentioned in the tables below.

Versions EE80 with voltage outputs
Scope of CO2 measurement Model
Output
Display
Temperature unit
Scope of temperature
0..2000 ppm (2)
CO 2 + T (CT)

CO 2 + T + RH (CTF)
0..5V (2)

0..10V (3)
without (--)

with display  (D04)
°C (--)

°F (E01)
standard (0..50 °C) (--)

other (Txx)
Versions EE80 with current outputs
Scope of CO2 measurement 
Model
Output
Display
Temperature
unit
Scope of
temperature
0..2000 ppm  (2)

0..5000 ppm  (5)
CO 2 + T  (CT)

4..20mA  (6)
without  (--)

with display (D04)
°C  (--)

°F  (E01)
standard (0..50 °C) (--)

other (Txx)

Model denotation is a combination of symbols provided in the brackets. For example, a device denoted as: EE80-2CT3D04 measures CO 2 concentration in the scope 0..2000 ppm and temperature in the scope 0..50 °C, it has a display and voltage outputs 0..10 V.

In standard, for application in the mushroom-growing halls, a model EE80-5CT6 is offered, which measures CO2 concentration in the scope 0..5000 ppm, does not have a display and has a current output 4..20 mA (temperature measurement is not used).

TECHNICAL DATA

EE80 METER MEASUREMENT CHARACTERISTICS for CO2 line
Sensor type NDIR, system of 2 infrared radiation sources
Scope of CO2 volume content measurement
0..2000 ppm or 0..5000 ppm
CO2 measurement accuracy for 20 °C and 1013 hPa
+/- (50 ppm + 2 % of the actual indication) - for version 2000 ppm
+/- (50 ppm + 3 % of the actual indication) - for version 5000 ppm
Meter response time (up to a level of 63%)
90 seconds
Temperature measurement dependency 
typically 2 ppm CO 2 / °C
Long-term stability
typically 20 ppm / year
Measurement time period
approximately 30 seconds
 EE80 METER MEASUREMENT CHARACTERISTICS for RH line
Sensor type capacity thin-layered
Scope of RH relative humidity measurement
10..90 % RH
RH measurement accuracy
+/- 3 % RH (30..70 % RH)
+
/- 5 % RH (10..90 % RH)
 EE80 METER MEASUREMENT CHARACTERISTICS for T line
Temperature measurement accuracy +/- 0,3 °C (for voltage version)
+/- 0,7 °C (for current version)
MEASUREMENT RESULTS OUTPUTS
Analogue output
4..20 mA, maximum load 500 ohm version with a current output
0..10 V, maximum load +/- 1 mA version with a voltage output
WORK CONDITIONS
Scope of environment relative humidity
0...90 % without steam condensation
Scope of work temperatures   
-5...55 °C  
Scope of storage temperatures
-20...60 °C  
POWERING, OVERALL DIMENSIONS
Scope of voltage power supplies
24 V AC +/- 20%
15..35 V DC
Energy consumption
15 mA (average), 150 mA (moment)
Warm-up time after power supply switch on
5 minutes
Overall dimensions
85 x 100 x 26 mm