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).

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

RH response time:

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

Long-term drift:

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

Calculated quantities:

Dew point

Output:

UART (TTL 3.3V)

Power supply:

3.3…6 Vdc

Power consumption:

<1 mA typ.

Connection:

4-pole M12