Indoor air quality checks need a probe that captures the full picture, not only one parameter. DX 330 measures temperature, relative humidity, CO2, atmospheric pressure and VOC index, giving technicians a detailed view of room conditions with one compact digital probe.
For reliable field work, the probe combines high-grade rH, CO2 and VOC sensors with factory calibration. Calibration data are stored in the probe, so it can be exchanged between compatible PRO handheld meters without recalibration. Optional DAkkS/ACCREDIA calibration for rH and temperature supports documented measurement routines.
Handling stays practical on site. The 4-pole M12 connection allows the probe to be screwed directly onto the meter for one-handed operation or used with a connection cable. With low typical power consumption below 6 mA and a housing weight of approx. 45 g, it is well suited to portable indoor air quality measurements.
The probe measures temperature, relative humidity, CO2, atmospheric pressure and VOC index. It also calculates dew point, wet bulb temperature and absolute humidity.
The probe uses the DX-Sensor interface with a 4-pole M12 connection for compatible PRO handheld meters.
Temperature and relative humidity are measured with CMOS technology, pressure with a piezoresistive sensor, CO2 with NDIR dual beam and VOC with a metal-oxide film sensor.
Adjustment is supported for temperature, relative humidity, CO2 and pressure, including offset functions and defined two-point options depending on the parameter.
The probe can be screwed directly onto the instrument or connected with a cable. A version including a 1 m M12 connection cable is available.
| Temperature sensor |
CMOS
|
|---|---|
| Sensor type pressure |
Piezoresistive
|
| CO₂ principle |
Non-Dispersive dual beam Infrared (NDIR dual beam)
|
| VOC index, range |
1...500
|
| Temperature range |
-20...+80 °C
|
| Sensor type temperature |
CMOS
|
| Sensor type relative humidity |
CMOS
|
| Relative humidity range |
0...100 %RH
|
| Pressure range |
300...1250 hPa
|
| Pressure type |
Barometric
|
| Accuracy temperature |
±0.2 °C
|
| Accuracy relative humidity |
±2% (0…80%RH) / ±3% (80…100%RH) @ T=10…50 °C
|
| Accuracy pressure |
± 0.5 hPa (300…1100 hPa / -20…65 °C)
|
| CO₂ accuracy |
± (50 ppm + 3% of the measure) @ 25 °C / 1013 hPa
|
| Temperature drift |
Pressure: ± 0.75 Pa/°C (0…55 °C / 700…1100 hPa)
CO2: 1 ppm/°C (-20…45 °C) |
| Operating temperature |
-20...+60 °C
|
|---|---|
| Operating relative humidity |
0...95 %RH
|
| Condensation |
not permitted
|
| Dimensions |
177 mm x 30 mm x 19 mm
|
|---|---|
| Weight |
45 g
|
| Materials |
ABS
|
| Interface type |
DX-Sensor interface M12
|
|---|
| Power consumption |
< 6 mA, typ.
|
|---|
| Connection |
4-pole M12
|
|---|---|
| Cable |
1 m PVC
|
