Pocket ORP Tester - Pen Type Redox Potential Meter - ±999 mV Range - ±2 mV Accuracy

The Master Science Pocket ORP Tester is a pen-type meter for oxidation-reduction potential. It reads ±999 mV in absolute or relative mode with 1 mV resolution and ±2 mV accuracy, and shows the value on a dual-line LCD.

Two versions are available. One has a fixed platinum-sheet sensor; the other takes interchangeable ORP electrodes through a BNC connector, including a type for hot samples below 100 °C. Both run for about 200 hours on two AAA batteries.

Technical Specifications

Specifications of the Master Science Pocket ORP Tester:

• Brand: Master Science
• Model Number: MSORP-P20SWISS, MSORP-P10SWISS
• SKU: MSORP-P20SWISS, MSORP-P10SWISS
• Brand: Master Science
• Model Number: MSORP-P10SWISS, MSORP-P20SWISS
• SKU: MSORP-P20SWISS, MSORP-P10SWISS
• ORP Range: ±999 mV
• Relative mV Range: ±999 mV
• Resolution: 1 mV
• Accuracy: ±2 mV
• Calibration: 1 point (offset)
• Sensor, MSORP-P10SWISS: Fixed ORP electrode, platinum sheet
• Sensor, MSORP-P20SWISS: Interchangeable ORP electrode, platinum pin or band, BNC connector
• Hold Function: Manual or automatic end point
• Auto Power-Off: 8 minutes after last key press
• Operating Temperature: 0 to 50 °C
• Display: Dual-line LCD, 21 × 21 mm
• Power: 2 × 1.5 V AAA batteries
• Battery Life: About 200 hours of continuous use
• Dimensions: 185 mm (P10) or 175 mm (P20) long × 40 mm diameter
• Weight: 100 g

Key Benefits

• Quick redox checks: the Master Science Pocket ORP Tester gives a direct mV reading.
• Adjustable to a standard: one-point offset calibration.
• Stable values: auto-read locks the end point.
• Long battery life: about 200 hours, with auto power-off.
• Replaceable electrode: BNC connection on the P20 version.

For wireless logging, see the Master Science Bluetooth ORP tester.

Product Features

Measurement

• Absolute and relative millivolt modes
• One-point offset calibration
• Manual or automatic hold

Convenience

• Auto power-off
• Reset to factory defaults
• Dual-line display

Applications

The Master Science Pocket ORP Tester is used for:

• ORP measurement in water samples
• General-purpose redox checks
• High-temperature samples below 100 °C with the optional electrode

Standard Accessories Included

• MSORP-P10SWISS: tester and plastic box
• MSORP-P20SWISS: tester, general-purpose ORP electrode, solution storage bottles and carrying case

Optional Accessories

• General-purpose ORP electrode
• High-temperature ORP electrode (<100 °C / 212 °F)

Common Problems and How This Tester Helps

How the Master Science Pocket ORP Tester makes redox testing simpler:

• Bulky meters for simple checks: 100 g pen format.
• Readings drifting while you write: hold function locks the value.
• Worn sensor means a new meter: replaceable electrode on the P20.
• Batteries left on: auto power-off after 8 minutes.