This Traceable® manometer/pressure/vacuum gauge displays gauge and differential pressure/vacuum in eleven different units. Large 5/8 inch high digits are visible from six feet. At the touch of a button unit may be zeroed or any pressure may set to zero. Differential feature permits reading the difference of the pressure or vacuum between two different sources. Memory feature recalls highest and lowest reading over any time period. A data hold key freezes the display to capture readings. Brilliant backlighting permits reading even in dark areas. Computer output permits all units to be connected to a computer for monitoring and storing unlimited results. To assure accuracy, an individually serial-numbered Traceable® Certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Non-printing model: Non-printing model is supplied with Traceable® Certificate, hose/tubing, 9-volt battery, computer output, and ABS plastic carrying case. Computer output allows current programmable capturing to be streamed to a pc computer (computer cable and software not supplied, requires accessory 8045). Replacement battery Cat. No. 1112. Features: Memory feature, backlight display, RS-232 capability. Size: 2-3/4 x 7-1/8 x 1-1/8in. Maximum Allowed psi: 30. psi Range: -15.00 to 15.00. psi Resolution: 0.01. mbar Range: -1034 to 1034. mbar Resolution: 1. bar Range: -1.034 to 1.034. bar Resolution: 0.001.cm/H2O Range: -1055 to 1055.cm/H2O Resolution: 1. inch/H2O Range: -415.0 to 415.0. inch/H2O Resolution: 0.3. feet/H2O Range: -35.00 to 35.00. feet/H2O Resolution: 0.02. mm/Hg Range: -776.0 to 776.0. mm/Hg Resolution: 0.5. inch/Hg Range: -31.00 to 31.00. inch/Hg Resolution: 0.03. kg/cm2 Range: -1.060 to 1.060. kg/cm2 Resolution: 0.001. oz/inch2 Range: -240.0 to 240.0. oz/inch2 Resolution: 0.2. kPa Range: -103.0 to 103.0. kPa Resolution: 0.1. Response Time: 0.5 second. Hose/Tubing Inside Diameter: 1/16 to 3/16-inch. Timing Range: Up to 100 Hours. Accuracy: ±0.3% of full scale between 0 to 50°C. Display: 1/2-Inch, 4-Digit LCD. Operating Temperature Range: 32 to 122°F; 0 to 50°C. Weight: 5oz. Control Company#: 3461.