2 × AA alkaline batteries

it is like using a newly opened bottle of solution

Quick Connect Din Connector

The S-H200-C reduces chlorine from you shower water

HM Digital’s pH buffer solution comes in powder form

HM Digital PSC-154 TDS/EC Controller – 4-20mA Output, Commercial Grade 800 ppm TDS calibration 2 × AA alkaline batteriesHM Digital PSC 154 TDS EC Controller Commercial Grade Water Quality Control with 4 20mA Output The HM Digital PSC 154 is a professional grade inline TDS EC controller engineered for high output commercial and industrial water treatment systems. It continuously monitors total dissolved solids (TDS) and electrical conductivity (EC), triggers an audible alarm when levels exceed your set point, and outputs a 4 20mA signal for direct integration with PLCs