What kind of thermometer to measure temperature and humidity at the same time?

A lot of thermometer can simultaneously measure the temperature and humidity, their classification is mainly by using the environment points, if is to use in a laboratory or warehouse, it is recommended to use a pointer type mechanical bimetal thermometer; If is specialized meteorological department, that is about to use professional dry wet bulb. Dry wet bulb is made up of two thermometers, one of the induction of gauze not package, called dry bulb thermometer, it is to measure the temperature of the air; Induction part of another package with icy gauze soaked with water or already, known as the wet bulb, because of the wet gauze ball evaporation heat, the former shows the degrees in unsaturated air is always higher than the latter. From the difference of the two with specialized meteorological tables found to absolute humidity. Its specific specification is as follows: model: WD - 5 types: external standard type glass thermometer material: plastic shell size: remove seven bottles and hook. 5 * 21. 5 cm, the thickness of 2. The temperature range of 2 cm: - 17/50C& F: precision & plusmn; 1 c / 2 f packing: 1 PC/white box product features: a dry bulb thermometer, a wet bulb, according to the dry bulb and wet bulb temperature, refer to table, relative humidity.