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Rotronic Hygro HL-1D

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Humidity and temperature data logger. Compact, dependable and inexpensive.


  • High measurement accuracy of ±3.0 %RH and ±0.3 °C
  • Compact design with a high IP protection
  • Large storage capacity: 64,000 data point memory
  • Programmable start and stop time with the HW4 software
  • MIN/MAX/AVG statistical function
  • Includes HW4-lite programming and analysis software
  • Clear LCD with visual alerts
  • Appropriately long battery life (up to 3 years)
  • Conforms to FDA 21 CFR Part 11 / GxP / GAMP 5 with HW4-P

Dimensions 90 x 60 x 23 mm
Weight 85 g
Range of application -20…70 °C / 0…100 %RH
Accuracy at 23 ±5 °C ±3.0 %RH / ±0.3 °C
Power supply / Power consumption 1x CR2 battery
Battery life 3 years (at a logging interval of 1 h)
Humidity sensor ROTRONIC HYGROMER® IN-1
Temperature sensor NTC
Measurement interval 30 s…24 h
Display type LCD, 2 lines, resolution 1 decimal
Display refresh rate 5 sec. (Standard)
(when logging same refresh rate as log interval)
LED indicator 2 LEDs
Right LED flashes green during data logging
Left LED flashes red when alarm limits breached or low battery
Battery indicator Yes
HW4 compatible V3.4.1 and higher
Storage capacity 32,000 data point memory (RH & T)
Communication interfaces Mini USB
IP protection rating IP67
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible
Adjustment Humidity 1-point

HygroLog HL-1D/TL-1D - Data sheet (PDF, 1.18 MB)9/15/15
HW4-LITE v3.7.0 - Software (ZIP, 109.74 MB)2/10/16

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