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 typeStandard probe
Dimensions128 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 consumptionvia optional docking station
Long-term stability sensor<1 %RH / year
Humidity sensorHygromer IN-1
Temperature sensorPT100 1/3 DIN Class B
Probe protectionABS
Response time t 63Typical 4 sec.
Psychrometric calculationsAll psychrometric values
Number of probe inputs3
Input for temperature sensorOptional adapter cable
Calibration / adjustmentwith HW4 / docking station
Measurement intervalbetween 5s and 24h
Engineering units displayedValue display, status display, operation, adjustment and view the log data.
Keypadwith display only
AlertingLED status indicator and audible alarm
Audible alarmYes
Real time clock w.backup batteryYes
Memory sizeMemory up to 47,000 records per MB on memory cards
Exploitation softwareROTRONIC HW4 / card reader, PDA
Menu guidanceYes
Trend indicatorYes, for models with display
Probe adjustment by softwareYes, with service cable
Probe adjustment by keypaddisplay / keyboard
Event loggingvia software HW4
Status indicator LEDYes
User informationfrom Software HW4 (devicemanager)
Data processing via HW4Yes
Device Protection by passwordYes
External dataloggingvia software HW4 / PC
Country settingsvia software HW4
Choice of Battery / rechargeable batteryOperation with a rechargeable battery or battery
Communication interfacesvia docking station
Service InterfaceUSB
Probe materialPolycarbonate
Enclosure materialABS
Anti theft deviceOptional with Docking Station
FDA/GAMP compatibilityFDA 21 CFR Part 11 and GAMP compatible

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