The PR381 integrates many advanced technologies and is a highly intelligent temperature and humidity verification device. The device is mainly used for calibration special calibration equipment such as hair temperature and humidity gauges (meters), dry-wet bulb thermometers, digital temperature and humidity meters as well as other special temperature and humidity sensors.
PR381 series temperature and humidity standard device is a high performance generating device of temperature and humidity, which can be used to calibrate all kinds of digital and mechanical thermo-hygrometers. It adopts the latest temperature and humidity control technology of PANRAN. When the temperature and humidity working range are widened，its humidity control speed is obviously accelerated and its stability is significantly improved. This series of products adopts the design of three-side window opening, double-side wire outlet and detachable support plate in the structure, which can make it easier for operators to carry out temperature and humidity calibration.
Products model & Technical parameters
| Specification /Model | PR381A Temperature and Humidity Standard Device | PR381B Temperature and Humidity Standard Device | Remarks |
| Range of temperature control | -5°C〜65°C | ||
| Range of humidity control | 10%〜95%RH (20°C〜30°C) | 10% 〜95%RH (20—30°C) | PR381B can control humidity within a temperature setting data of 15°C ~ 30°C. |
| 30%〜80%RH (5°C〜50°C) | 15%〜90%RH (15°C〜20°C) | ||
| Temperature resolution | 0.01°C | ||
| Temperature uniformity | ≤ 0.15°C(15°C〜30C), ≤ 0.3°C (-5°C〜65°C) | ||
| Temperature stability | ≤±0.1°C/30minutes | Temperature control with external platinum resistance | |
| Rate of temperature change | ≤ ± 0.02°C/minute | ||
| Temperature accuracy | ±0.1°C | ||
| Humidity resolution | 0. 01%RH | ||
| Humidity uniformity | ≤ 0.8%RH (5°C〜50°C, full range of humidity) | ≤ 0.8%RH (15°C〜30°C, full range of humidity) | |
| Humidity stability | ≤ ±0. 3%RH/30minutes（5°C〜50°C, full range of humidity） | ≤ ±0. 3%RH/30minutes （15°C〜30°C, full range of humidity） | |
| Rate of humidity change | ≤0.3% RH/minute | ||
| Humidity accuracy | ±1.0%RH (15°C〜30°C), ±1.5%RH (5°C〜50°C) | ||
| Adjusting time of temperature and humidity | (15°C 80%RH) adjusted to (30°C 10%), 60 minutes | Temperature and humidity at a stable state | |
| (30°C 10%RH) adjusted to (15°C 80%), 50 minutes | |||
| Adjusting time of humidity | (20°C 20%RH) adjusted to (20°C 80%), 8 minutes | Temperature and humidity at a stable state | |
| (20°C 80%RH) adjusted to (20°C 20%), 10 minutes | |||
| Defrost duration | 10minutes | 20minutes | |
| Auxiliary cooling circuit | Yes | No | Cold air cooling |
| Working environment | 10°C〜30°C, ≤ 80%RH | ||
| working area dimensions | 50cm X 50cm X 50cm | ||
| Dimensions | 180cm X 100cm X 70cm (Height X depth X width) | Pallet size not included | |
| Power | 3KW | ||
| Power supply condition | 220VAC, 50Hz | ||
| Weight | 180kg | ||
