Delta OHM HD31 - Handheld Portable Multifunction Data Logger

The HD31 is a portable multifunctional instrument and datalogger with a large (43 x 58 mm) colour graphic LCD display.
It has three independent inputs. Both single and combined SICRAM probes can be connected to each input to measure a variety of physical quantities:

•  Temperature
• Relative humidity
• Atmospheric and differential pressure
•  Air speed
• Illuminance (lux) and Irradiance
• Carbon dioxide (CO₂) – Air Quality
• Direct voltage (VP473 module) and current (IP472 module)

Sampling speed one per second each channel. Storage capacity 32,000 samples per channel.

Functions: CLOCK, HOLD, RELATIVE, DIFFERENCE, MINIMUM, MAXIMUM, AVERAGE. Simultaneous display of three measurements. Calibration of the individual probes with permanent storage of the calibration data inside the probe: probes can be changed without losing the calibration.