BLE-3188 7-In-1 WiFi Water Quality Tester Online Water Monitor for PH/ORP/EC/PPM/CF/Humidity/Temperature Testing. ORP: -1200mV to 1200mV. - Support to connect to Tuya APP via WiFi, with stable data transmission, you can download APP to view current or historical data directly on the cellphone, and with abnormal high and low data alarm function.
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