Pen Meter (DORP1)

The Pen Meter (DORP1) is a pocket-sized, single-parameter pen tester measuring Oxidation-Reduction Potential (ORP) from -1000.0 mV to +1000.0 mV with accuracy of ±0.1% F.S. ±1 digit and resolution of 0.1/1 mV, featuring replaceable combined electrode design (DORP1-S), multi-color backlit LCD display with reading stability indicator and auto data lock, IP67 dustproof/waterproof rating, 0-60℃ temperature measurement with ±0.2℃ accuracy, 1 point automatic calibration with 222 mV ORP standard, support for CH/USA/NIST standard buffer solutions, low battery indicator, user-configurable auto shut-off and backlight duration, and complete field-ready kit including hard carrying case, ORP standard solution (222 mV, 30mL), 3 mol KCl electrode storage solution (10mL), sample vial (30mL), 4 AAA batteries, and lanyard—ideal for water quality testing in clinical, pharmaceutical, and environmental applications .

For the dialysis technician, infection control officer, and water quality specialist, the DORP1 enables rapid, on-site ORP measurement to verify disinfection efficacy in purified water systems, dialysis fluids, and pharmaceutical process water—critical parameters for ensuring patient safety during renal replacement therapy and drug manufacturing . The replaceable electrode design extends instrument service life, while the IP67 rating ensures reliable operation in harsh field environments .

Key features include multi-color backlit display with reading stability indicator and auto data lock when stable (smiley icon), function, low battery indicator, user-configurable auto shut-off time and backlight duration, and compatibility with CH, USA, and NIST calibration standards . The DORP1+ variant adds Bluetooth connectivity for wireless connection to mobile APP with two-way control, unlimited data storage, graphical display modes (chart, curve, dial, normal), calibration reminders, measurement object ID management, and timed storage .

For the patient, accurate ORP monitoring of water used in dialysis and pharmaceutical manufacturing ensures that critical treatment fluids meet stringent safety and quality standards—preventing potential harm from improperly treated water and supporting the production of safe, effective medications.