The MW500 Standard Portable ORP Meter is a durable and reliable instrument designed specifically for measuring Oxidation Reduction Potential in water environments. This device provides quick and accurate mV readings to help aquarists monitor the overall chemical balance and sanitization efficiency within their saltwater systems, ensuring a healthy habitat for marine life without unnecessary complexity.

Engineered for practical use, this meter features a measurement range of ±1000 mV with a resolution of 1 mV and an accuracy of ±5 mV. It operates effectively in temperatures from 32 to 122 degrees Fahrenheit and includes the SE300 platinum electrode, a 9V battery offering approximately 300 hours of continuous use, and necessary calibration solutions right out of the box. Its compact dimensions of 145 x 80 x 40 mm make it highly portable for fieldwork or easy storage in any aquarium maintenance kit.

This low-cost yet high-performance meter is ideal for classroom demonstrations, laboratory settings, and general field use where reliability is paramount. Whether you are a hobbyist looking to upgrade from litmus strips or an educator teaching water chemistry principles, the MW500 offers a straightforward solution that combines Milwaukee Instruments reputation for durability with essential functionality for maintaining optimal water quality.