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Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMT220

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GMT220 Series Carbon Dioxide Transmitters for harsh and humid environments

Designed for harsh and humid environments. Provides several alternatives for measurement range from ppm to percentage level. The housing is IP65 (NEMA 4) compliant.

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Product Description

Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMT220
Incorporates Vaisala CARBOCAP Sensor - the silicon-based NDIR sensor
IP65 (NEMA 4) protected against dust and spray water
Choice of several measurement ranges
Easy installation
Interchangeable probes – easy maintenance

The Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMT220 is designed to measure carbon dioxide in harsh and humid environments. The housing is dust and waterproof to IP65 (NEMA 4) standards. The materials have been chosen for good corrosion resistance.

High-end measurement technology
The GMT220 series incorporate the advanced Vaisala CARBOCAP® Sensor. The patented sensor has unique reference measurement capabilities. Its critical parts are made of silicon; this gives the sensor outstanding stability over both time and temperature. By lengthening the time between calibration intervals, the user saves both time and money.

Optimal measurement range for each application
The user has a choice of measurement ranges up to 20 % CO2: the GMT221 for higher concentrations of CO2 and the GMT222 for lower concentrations of CO2. The transmitter can be connected to various measurement systems. In addition to standard analog, voltage and current outputs, there are also two configurable alarm relay outputs. Activated relays are indicated by LED lights on the cover. An optional LonWorks® digital interface is also available.

Interchangeable probes
The GMT220 probes are truly interchangeable. They can be removed and reattached or replaced at any time – without the need for calibration and adjustment. The probes can be attached directly to the transmitter body or, when used with a cable, installed remotely into hard-to-reach places or areas with dangerously high levels of CO2.


General
Measurement Ranges
GMT221
0...2% CO2
0...3% CO2
0...5% CO2
0...10% CO2
0...20% CO2

GMT222
0…2000 ppm
for low concentrations 0…3000 ppm
0…5000 ppm
0…7000 ppm
0…10,000 ppm

Accuracy at +25C (+77F) against certified factory references
GMT221 <+/-[0.02% CO2 +2% of reading]
GMT222 <+/-[20 ppm CO2 +2% of reading]
(incl. repeatability and calibration uncertainty)

Long-term stability <+/-5 %FS/2 years
Response time (63%)
GMT221 20 seconds
GMT222 30 seconds

Analog output signals 0...20 or 4...20 mA and 0...10 V
Resolution of analog outputs 0.03 %FS