Thomas - 4410 Traceable Dew-Point/Wet-Bulb/Humidity/Temperature Alarm, -40 to 158 degree F, -40 to 70 degree C, 1 to 99% RH

• Digital thermometer and humidity gauge for measuring humidity, temperature, dew-point temperature and wet-bulb temperature.
• Measures temperature from -40 to 70 degrees C (-40 to 158 degrees F), with an accuracy of + or - 1 degree C.
• Measures humidity from 1 to 99% relative humidity, with an accuracy of + or - 4%.
• Minimum/Maximum temperature and humidity memory and programmable temperature and humidity alarm for monitoring accuracy of temperatures and humidity readings.
• Calibrated to ISO 17025 traceability standards for reliability of measurements.

The Thomas Traceable dew-point/wet-bulb/humidity/temperature alarm is a thermometer and humidity gauge for measuring air temperature, humidity, dew-point temperature, and wet-bulb temperature. The thermometer measures temperature from -40 to 70 degrees C (-40 to 158 degrees F), with an accuracy of + or - 1 degree C. The humidity meter measures humidity from 1 to 99% relative humidity (RH), with an accuracy of + or - 4% between 20% and 80% RH. The unit has a minimum/maximum temperature and humidity memory and a programmable temperature and humidity alarm for twenty-four hour monitoring. An alarm will sound and a LED flashes for up to 1 minute after the limits have been exceeded. The thermometer is traceable to National Institute of Standards and Technology standards, indicating that it is calibrated to International Organization for Standardization (ISO) 17025 levels. This Thomas thermometer is used to monitor air temperature in laboratories, storage rooms, and refrigerators. Specifications -------------- Power source(2) AA batteriesTemperature range-40 to 70 degrees C (-40 to 158 degrees F)Temperature accuracy+ or - 1 degree CTemperature resolution0.1 degree C/0.1 degree FRelative humidity range1 to 99% RHRelative humidity accuracy+ or - 4% between 20 and 80%Standard metInternational Organization for Standardization (ISO) 17025Weight4.25 oz.Dimensions (H x W x D)4.125 x 4.125 x 1 inches H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. Digital thermometers are instruments used to measure the temperature of air, liquids, or surfaces electronically. They may measure temperature in Celsius, Fahrenheit, or both. Most digital thermometers use thermistors, which are small electronic resistors. Thermistors are made out of metals that conduct electricity within a certain range and become more conductive the warmer they get. A microcontroller inside the thermometer measures this electrical conductivity and converts it to a temperature, which is displayed on an LCD. Digital thermometers are used in a wide range of applications, including in laboratory settings, food service and storage, and in doctors' offices and hospitals. Thomas Scientific manufactures lab supplies, equipment, s, and instruments for scientific research. It is a registered contractor for the United States Federal Government. The company was founded in 1899 and is headquartered in Philadelphia, PA.