Feature:1. Wide Applications: Widely used to measure fan and blower pressure, filter resistance, wind speed, furnace pressure, orifice differential pressure, etc.2. Uses: Suitable for air gas ratio control and automatic valve control in combustion process, as well as blood pressure and respiratory pressure monitoring in health care equipment3. Versatile Functions: Differential pressure gauge has differential mode and record mode, zero adjustment and data correction functions4. LCD Display: This is handheld digital pressure gauge, which features oversized LCD backlit display for ease of use5. Basic Specifications: The accuracy of the pressure gauge is 0.3%FSO (25C), and the repeatability is 0.2% (maximum 0.5%FSO)Specification:Item Type: Digital ManometerModel: 520Material: ABS, RubberBattery: 1.5V AAA x 4 (Not Included)Uses: Widely used to measure fan and blower pressure, filter resistance, wind speed, furnace pressure, orifice differential pressure, etc., also used in air gas ratio control and automatic valve control during combustion, as well as blood pressure and respiratory pressure monitoring in healthcare equipment Accuracy: 0.3%FSO (25)Repeatability: 0.2% (Maximum 0.5% FSO)Linearity Hysteresis: 0.29%FSOResponse Time: Typical 0.5 SecondsLow Battery Reminder Function: YesExceed Positive Pressure Range Prompt: Err1Exceed Negative Pressure Range Prompt: Err2.Package List:1 x Digital Manometer4 x Air Pipe1 x USB Cable1 x Driver CD1 x User Manual