11 • Chapter 1: Introduction GX-3R Pro Operator’s Manual
STEL Setpoint
35 ppm 10.0 ppm 1.00 ppm 1.00 ppm 5.00 ppm
TWA Setpoint
25 ppm 4.7 ppm 0.50 ppm 0.30 ppm 2.00 ppm
Indication
Accuracy
± 10% of reading or ± 5% of full scale (whichever is greater)
Table 4: GX-3R Pro Specifications
Sampling
Method
Diffusion
Response Time
T90 within 30 seconds
Display
Graphics LCD Display
Max. Distance
for Bluetooth
Connection
30 feet, unobstructed
Environmental
Conditions
• 3000 meter maximum altitude
• Operating pressure: 70 - 120 kPa (70 - 110 kPa for explosion proof)
• Pollution degree 2
•IP 66/68
Operating
Temperature
& Humidity
Continuous environment: -20°C to 50
°
C/Below 90% RH
Temporary environment (up to 15 minutes): -40°C to 60
°
C/Below 95% RH
Safety/
Regulatory
• ATEX: Certificate Number: DEKRA 17ATEX0103 X
II1G Ex da ia IIC T4 Ga/IM1 Ex da ia I Ma (with NCR-6309)
II1G Ex ia IIC T4 Ga/IM1 Ex ia I Ma (without NCR-6309)
• IECEx: Certificate Number: IECEx DEK 17.0050X
Ex da ia IIC T4 Ga/Ex da ia I Ma (with NCR-6309)
Ex ia IIC T4 Ga/Ex ia I Ma (without NCR-6309)
• CSA classified, “C/US”, as Intrinsically Safe. Class I Division 1 Groups A, B, C, D T4.
Class I, Zones 0, A/Ex da ia IIC T4 Ga (with NCR-6309)
Class I, Zones 0, A/Ex ia IIC T4 Ga (without NCR-6309)
Alkaline version not verified with CAN/CSA 60079-29-1 & ANSI/ISA 60079-29-1
C US
186718
Table 3: EC Sensor Specifications
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