Feature: 1. PH controller has built‑in instruments, electrodes and all accessories, which are easy to use. 2. Beautiful appearance, light weight and thin body, easy to install, operate and maintain. 3. PH and temperature can be measured on one instrument at the same time, which is practical and convenient. 4. Water quality tester is made of high‑quality ABS material, durable and wear‑resistant. 5. The PH meter has accurate testing results, high stability and good performance. Specification: Item Type: PH Controller Material: ABS Model: PH-221 Function: monitor the PH value of water quality Scope of application: suitable for places that need water quality monitoring, such as fish hatching, wine production, swimming pools (bathrooms), laboratories, water quality management, middle schools and universities, floral analysis fluids (PH value), pond, various industries, etc. Measuring Range PH: 0.00~14.00 Temp: 0~50℃ Resolution PH: 0.01 Temp: 0.1°C(0.2 ℉ ) Accuracy PH: ±0.02PH Temp: ±1℃ Working Environment 0℃~50° C; RH