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:

UART (TTL 3.3V): DX-Sensor-Interface

Power supply:

3.3…6 Vdc

Power consumption:

<1 mA typ.

Connection:

4-pole M12 via cable

Dimensions:

Stem: Ø14 x 132 mm Handle length 98 mm Cable length: 2, 5 or 10 m

Weight:

100 g approx. with 2 m cable

Sensor:

RH: Capacitive
Temperature: Pt100

Measuring range:

RH: 0 ... 100 %
Temperature: -50 ... +160 °C

Resolution:

RH: 0.01 %
Temperature: 0.01 °C

Accuracy:

RH: ± 1.2% (0…85%) / ±2% (85…100%) @ T=0…50 °C (1.5 + 1.5% of the measured value)% @ T=remaining range
Temperature: ± 0.1 °C ± 0.1% of the measured value

Operating conditions:

-50…+160 °C / 0…100 %RH

Materials:

Stem and protector cap: PBT Handle: Polyamide (PA6-GF30) Cable: PVC

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

Adjustment support:

Multipoint RH

Long-term drift RH:

±0.5 %RH/year

Measuring range RH:

0…100%

Resolution RH:

0.01%

Sensor RH:

Capacitive, temperature compensated

Temperature:

Pt100