pH and temperature benchtop meter, HI 2213 is a microprocessor based HI 2213 pH/ORP Benchtop Meter with Three Point Calibration Up to three point pH calibration with five standard buffers or two custom ORP measurement Relative mV readings GLP features Calibration expiration reminder Automatic Temperature Compensation The HI 2213 is a pH and temperature benchtop meter. HI 2213 can also measure oxidation reduction potential (ORP) in the mV range. A relative mV feature is provided. Calibration can be performed at up to three-points using five standard and two custom buffers. This instrument features manual or automatic temperature compensation with the HI 7662 temperature probe. GLP (Good Laboratory Practice) feature provides data consistency. A calibration reminder can be set to alert the user, that too much time has elapsed since the last pH calibration and a new one should be performed. Specifications: Range pH –2.00 to 16.00 pH mV ±699.9 mV; ±2000 mV Temperature –20.0 to 120.0 ºC Resolution pH 0.01 pH mV 0.1 mV; 1 mV Temperature 0.1 ºC Accuracy @ 20°C pH ±0.01 pH mV ±0.2 mV; ±1 mV Temperature ±0.2ºC (excluding probe error) Relative mV Offset Range ±2000 mV pH Calibration automatic, up to three points with five standard buffers available (4.01, 6.86, 7.01, 9.18, 10.01), and two custom buffers Temperature Compensation manual or automatic from –20.0 to 120.0 ºC (-4.0 to 248.0ºF) pH Probe HI 1131B glass body pH electrode with BNC connector and 1 m (3.3’) cable (included) Temperature Probe HI 7662 stainless steel temperature probe with 1 m (3.3’) cable (included) Input Impedance 1012 ohm Power Supply 12 VDC adapter (included) Environment 0 to 50°C (32 to 122°F); RH max 95% Dimensions 235 x 222 x 109 mm (9.2 x 8.7 x 4.3”) Weight 1.3 kg (2.9 lbs.) Hanna HI2213 pH Meter à¤Ã×èͧÇÑ´¡Ã´ ´èÒ§ à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ