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The Rotronic HygroLog HL20 measuring range is from 0 to 100 %RH / -10 to 60 °C.
The HL20 is a humidity temperature data logger that is designed for recording surrounding conditions in indoor areas such as research labs, high-tech manufacturing facilities and warehouses, storage areas and containers for sensitive goods, museums, office buildings, and so forth. The HL20 is completely agreeable with FDA 21 CFR part 11 and GAMP 4 necessities for electronic records and electronic signatures (ERES).
| AirChip3000 • Temperature compensates humidity with over 30000 reference points • Dew/frost point calculation • Sensor auto-diagnostics and automatic correction • Active alarming and information • Conforms to FDA21 CFR Part 11 and GAMP4 (audit trail) | |
| Optional display • Display of data on a clear, backlit graphic display • Battery charge indicator • Display of measured and calculated data • Function key to start and stop logging • Display resolution to 2 decimal places |  |
| Data logging function • Logs up to 20,000 value pairs, relative humidity and temperature • Each record is date and time stamped (real-time clock) • Adjustable log interval • Two data recording modes: (start-stop or loop) Alarm function Visible alarm can be programmed for the HL20 detects the following: • Out-of-limits value (defined with HW4 software) • Communication loss with the probe • Sensor failure and sensor drift |
| Device type | Humidity-temperature data logger with internal sensor(s) |
| Battery type | 3 x AA (1.5 V) alkaline |
| Battery life | Depends on log interval and other settings. Examples based on a 30 minutes log interval: - Models w/o LC display: 20 months - Models with LC display, display sleep function set to 1 minute: 13 months |
| Low battery indication | Yes (with HW4 software or with optional display) |
| Measuring range | 0…100 %RH / -10...60 °C |
| Measurement accuracy at 23 °C | ±0.8 %RH @ 10..60 %RH / ±0.3 °C ±1.3 %RH @ 60..100 %RH / ±0.3 °C |
| Repeatability | 0.3 %RH / 0.05 °C |
| Long term stability | <1 %RH / year / < 0.1 °C / year |
| Response time | Humidity: typical 3 min. Temperature: typical 10 min. (both depend on air flow) |
| Psychrometric calculations | Dew or frost point (user configurable setting) |
| Start-up time | 1.9s (typical) |
| Data refresh rate | 1.7s (typical) |
| Recording capacity | 20,000 value pairs |
| Real time clock | Yes, adjustable via PC |
| Logging modes | Start-stop (recording stops when memory is full) Loop: oldest data is dumped to make room for latest data |
| Log interval | Min. 5 sec, up to1 hour in 5 sec. increments |
| Interface type | UART (Universal Asynchronous Receiver Transmitter) |
| Optional display | LC, 1 or 2 decimal resolution, backlight, alarm and low battery indication |
| LED indicator | 5 sec. green flash when recording data 5 sec. red flash for out-of-limit value or logger problem |
| Housing material | ABS |
| Housing protection grade | IP 40 |
| Weight | About 210 g (7.4 oz) |
| Solder type | Lead free (RoHS directive) |
| FDA / GAMP directives | Compatible |
| Operating limits | -10….60 °C (models w/o display) 0….50 °C (models with display) 0…100 %RH, non condensing |
| Overall dimensions | 130 x 72 x 32 mm (5.1 x 2.8 x 1.3”) |
Dimensions
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