A robust and waterproof (IP67) measuring meter covering all the important measurement categories of liquids. This meter has a high sensitivity and is fitted with interchangeable measuring probes. In addition to the numerical display of the measurement this meter has a bar graph display and a measurement memory. * Measures ORP/Redox from -999 to 999mV * Automatic electronic self calibration * Simulated analog bargraph displays change in ORP reading * High resolution of 1mV * Memory stores and recalls 15 readings and saves last calibrated value * Data validation indicators show user the reading is stabilized * Data Hold, Auto shut-off and low battery indicatio * Accuracy: Redox ±4mV * Dimensions: (W x H x D) 36 x 172 x 41 mm * Measurement range(s): Redox -999 - 999 mV * Operating temperature: 0 - max. +50°C * Power supply: 4x CR2032 battery * Resolution: Redox 1mV * Weight: 110g Supplied with 4x batteries (type CR2032), Protective cap, Plastic cup, Carrying strap and operating instructions. https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2025-02-03 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2025-03-25 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2025-06-12 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2025-07-21 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2025-10-12 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2026-07-13 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2026-08-29 https://elecena.pl/product/27788194/extech-re300-waterproof-orp-meter 2026-09-22