Specification Brand : Tecpel BulletPoint : Tecpel digital Humidity thermo hygrometer data logger recorder DTM-322 BulletPoint1 : Moisture:5%--30% ±(1%Rh+0.5) BulletPoint2 : Temperature:-10°C--60°C ±2.5°C(±5°F) BulletPoint3 : Working temperature: 0 Degrees Celsius -40 Degrees Celsius BulletPoint4 : Working Moisture: 0-85%Rh BulletPoint5 : Weight:400g in total CurrentRating : 18 amps ExternallyAssignedProductIdentifier1 : 0615150726634 ExternallyAssignedProductIdentifier2 : 615150726634 ItemName : Tecpel Digital Handheld Humidity Thermo Hygrometer Data Logger Recorder DTM-322 ItemPackageDimensions_Height : 10 inches ItemPackageDimensions_Length : 6 inches ItemPackageDimensions_Width : 7 inches ItemPackageQuantity : 1 ItemTypeKeyword : humidity-meters Manufacturer : Tecpel Material : Plastic MaximumSwitchingCurrent : 18 amps ModelNumber : 705426 MountingType : Tabletop NumberOfItems : 10 OperationMode : Automatic PartNumber : Tecpel DTM-322 ProductDescription : DTM-322: Dual Input + Data Recorder.+RS-232 interface (optional USB cable) Specifications: Q & A: Customer asks in DTM-321 manual, measurement range is 0%~100% but operating environment is only 0 to 90% non-condensing –> so whether these two information conflicts? to extend its usage life. The sensor measurement range can work for 0~ 100% RH but the operating environment 0 ~ 90% RH(Non Condensing) is for the meter itself. There is no conflicts with each other. Besides, 100% RH is close to water and this will cause meter damaged for all electronics devices. Therefore, it is recommended to keep the sensor and meter dry to extend its reliability and usage life. Features: Temp:-20°C ~ 60°C (-4°F ~ 140°F ); K-type: -200°C ~ 1,370°C (-328°F ~ 2,498°F); Humidity: 0 ~ 100% RH Data Logging capacity 16,000 records. 4 Digit, Triple display. K-type Termocouple. Reading hold, °C or °F annunciators. MAX, MIN function. Auto power off. Time function. Automatic low battery indication. RS-232 computer interface. RS-232 cable and software for Windows. USB Cable and USB driver disk (optional) ProductSiteLaunchDate : 2017-05-09T07:00:00.000Z Size : 10 pack StreetDate : 2017-10-10T00:00:01Z UnitCount : 1 UpperTemperatureRating : 140 degrees_fahrenheit