Handheld Digital Manometers are designed for industrial or laboratory uses. An absolute pressure model is also available with a range of 0 to 2,815 in H2O. This can be used to measure gauge or vacuum. All models measure either positive, negative or differential pressures with ±0.5% of full-scale accuracy. A memory function allows storage of up to 20 readings for later recall and a backlight provides auxiliary lighting for hard-to-see locations. The custom molded case allows this manometer to withstand continual heavy use and operation in industrial or humid environments. Each unit has a high contrast liquid crystal display with a backlight feature, which allows readings to be seen in all applications. All of the differential models can measure gauge or vacuum pressures, as well as differential, by venting the low and high ports to atmosphere, respectively. Data logging features enable readings to be taken (up to 250 points), stored, retrieved and downloaded.