Performance

Measurement ranges
        GMT221





        GMT222
        for low concentrations



Accuracy at +25 °C (+77 °F) against certified factory references (incl. repeatability and calibration uncertainty)
        GMT221

        GMT222
Nonlinearity
Sensor

0 ... 2 % CO₂
0 ... 3 % CO₂
0 ... 5 % CO₂
0 ... 10 % CO₂
0 ... 20 % CO₂

0 ... 2000 ppm
0 ... 3000 ppm
0 ... 5000 ppm
0 ... 7000 ppm
0 ... 10 000 ppm




<± [0.02% CO₂ + 2 % of reading]
(applies for concentration above 2% of full span)
<± [20 ppm CO₂ + 2 % of reading]
<± 1.0% FS
Vaisala CARBOCAP^®

Operating environment

Temperature
        display
Relative humidity

-20 ... +60 °C (-4 ... +140 °F)
0 ... +50 °C (+32 ... +122 °F)
0 ... 100 %RH non-condensing

Inputs and outputs

Operating voltage
Power consumption
Analog output signals

nominal 24 VAC/VDC
<4 W
0 ... 20 or 4 ... 20 mA and 0 ... 10 V

Mechanics

Probe cable length
Weight
        GMT221
        GMT222
Material
        transmitter body
        probe
Housing classification

2 m and 10 m (optional)

max. 280 g
max. 300 g

ABS plastic
PC plastic
IP65 (NEMA 4)

Options and accessories

GMP221, GMP222

25245GM
GM45156
25665GMSP
210848GMSP
GMK220
19040GM
26150GM
GM70

spare probe (use the order form to define measurement range etc.)
clips (2 pcs) for attaching the probe
mounting flange for the probe
2.0 m probe cable
10.0 m probe cable
calibration kit for interchangeable probes
serial COM adapter for maintenance purposes
chamber for pump aspirated sampling systems
hand-held CO₂ meter for field verification and calibration