0 Buffer Solution 20-Pack

Replace at the 2-year mark to maintain consistent mineral output and alkaline pH

Automatic screen brightness control

Accepts any Series IV filter — swap for the best filter for your activity

2 Triple A (AAA) batteries

HM Digital ORP-200 Waterproof ORP Meter push-fit water fitting 0 Buffer Solution 20-PackORP 200: Waterproof Professional Series ORP Temp Meter ORP 200: Waterproof Professional Series ORP Temp Meter The ORP 200 is a professional grade ORP meter ideal for all ORP testing, including anti oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring, cooling tower disinfection, environmental testing, fruit & vegetable washing, hydroponics, metal finishing, ozone system monitoring,