DX 310/311 is a digital combined temperature and relative humidity probe for the PRO D01 / PRO D05 handheld meters.
The probe supplies the following calculated quantities:

• Dew point
• Wet bulb temperature
• Absolute and specific humidity
• Mixing ratio
• Specific enthalpy
• Partial vapor pressure
• Frost point temperature
• Saturation vapor pressure above water and above ice

The probe is supplied factory-calibrated in multiple points for relative humidity, and it is ready to use.
The probe can be optionally supplied with a DAkkS/ACCREDIA calibration certificate.
The calibration data are stored in the probe, allowing for interchangeability without the need for recalibration.
Equipped with 4-pin M12 connector and 2, 5 or 10 m cable (only DX311).

Output:

DX-Sensor-Interface

Power consumption:

<1 mA typ.

Connection:

4-pole M12

Dimensions:

Stem: Ø14 x 101 mm Overall: Ø14 x 114.8 mm

Weight:

20 g approx.

Material:

Stem and protector cap: PBT

Sensor:

RH: Capacitive
Temperature: Pt100

Operating conditions:

-40 … +80 °C / 0 … 100 %RH

Long-term drift:

RH: ± 0.5 %RH/year
Temperature: ± 0.03 °C/year

RH response time:

10 s (10 → 80 %RH; air speed=2 m/s @ constant temperature)

Calculated quantities:

Dew point Wet bulb temperature Absolute humidity Specific humidity Mixing ratio Specific enthalpy Partial vapor pressure Frost point temperature Saturation vapor pressure above water Saturation vapor pressure above ice

Accuracy RH:

±1.2% (0…85%) / 2% (85…100%) @ T=0…50 °C (1.5 + 1.5% of the measured value)% @ T=remaining range

Accuracy temperature:

± 0.1 °C ± 0.1% of the measured value

Adjustment support:

Multipoint RH

Long-term drift RH:

±0.5 %RH/year

Measuring range RH:

0…100%

Measuring range temperature:

-40 ... +125 °C

Resolution RH:

0.01%

Resolution temperature:

0.01°C

Sensor RH:

Capacitive, temperature compensated