HygroLog HL-NT Humidity Temperature Data Logger

HygroLog HL-NT Humidity Temperature Data Logger

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The HygroLog HL-NT humidity, dew point and temperature data logger can be used with any of the HygroClip 2 probes. The HL-NT can monitor up to 7 probes as well as up to two external on/off contacts, such a a door contact.

When used together with the validated ROTRONIC HW4 software the HygroLog HL-NT data logger complies with FDA 21 CFR part 11 regarding electronic data records and electronic signatures (ERES).

The HW4 software can display the data from several data loggers on multiple PCs and can centrally record on one of the PCs the measurement data from several loggers. As a protection against power outages and network failures, HW4 can be used to automatically download the locally recorded data at regular intervals of time.


  • Saves 47,000 data records per MB card storage capacity (incl. 32 MB card)
  • Range of measurement: -30 to 70°C (-10 to 60°C, with display), 0 to 100 %RH
  • Calculation of all psychrometric parameters
  • Integrated clock for timestamp for every measured value
  • Selectable logging interval, 5sec to 24h
  • Power supply: 9 V (battery, rechargeable battery or docking station)
  • Networkable with PC, via docking station (USB, Ethernet, WLAN)
  • Audible alarm
  • IP40
Probe type Standard probe
Dimensions 128 x 109 x 42 mm
Operating range electronics -10…60 °C / 0…100 %RH
Accuracy at 23 ±5 °C ±0.8 %RH / ±0.1 K
Measuring range with integrated probe -100…200 °C / 0…100 %RH
Power supply / Power consumption via optional docking station
Long-term stability sensor <1 %RH / year
Humidity sensor Hygromer IN-1
Temperature sensor PT100 1/3 DIN Class B
Probe protection ABS
Response time t 63 Typical 4 sec.
Psychrometric calculations All psychrometric values
Number of probe inputs 3
Input for temperature sensor Optional adapter cable
Calibration / adjustment with HW4 / docking station
Measurement interval between 5s and 24h
Engineering units displayed Value display, status display, operation, adjustment and view the log data.
Backlight Yes
Keypad with display only
Alerting LED status indicator and audible alarm
Audible alarm Yes
Real time clock w.backup battery Yes
Memory size Memory up to 47,000 records per MB on memory cards
Exploitation software ROTRONIC HW4 / card reader, PDA
Menu guidance Yes
Trend indicator Yes, for models with display
Probe adjustment by software Yes, with service cable
Probe adjustment by keypad display / keyboard
Event logging via software HW4
Status indicator LED Yes
User information from Software HW4 (devicemanager)
Data processing via HW4 Yes
Device Protection by password Yes
External datalogging via software HW4 / PC
Country settings via software HW4
Choice of Battery / rechargeable battery Operation with a rechargeable battery or battery
Communication interfaces via docking station
Service Interface USB
Probe material Polycarbonate
Enclosure material ABS
Anti theft device Optional with Docking Station
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible

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