Hanna Instruments HI98129 pH, TDS, EC, and Temp Combo Meter 500 Gallons This filter features excellent water

This filter features excellent water flow

There is no need to buy the RO membrane housing or flow control separately

Mounts on the sight port plug

Working Pressure: 141 psi @ 70° F

Hanna Instruments HI98129 pH, TDS, EC, and Temp Combo Meter 500 Gallons This filter features excellent waterFeatures: High accuracy pH, EC TDS and temperature measurements Waterproof combo has a large easy to read, dual level LCD and automatically shuts off EC TDS and pH readings automatically compensate for the effects of temperature (ATC) Tester has a greatly extended life: Replaceable pH electrode cartridge with an extendable cloth junction. EC TDS graphite electrode resists contamination by salts other substances. User can select the EC TDS conversion