Manufacturer of digital measurement instruments, including water quality testers, weather stations, temperature controllers, and power meters.
JUANJUAN is a manufacturer of precision electronic measurement tools and home monitoring devices, widely available through major online marketplaces. The brand specializes in environmental testing equipment, producing multi-function water quality monitors capable of measuring pH, TDS, EC, and salinity for aquariums, pools, and laboratories.
Their product lineup also includes digital temperature controllers (thermostats), weather stations with hygrometers, wall stud scanners, and coating thickness gauges. Designed for both hobbyist and professional use, JUANJUAN products focus on delivering affordable, functional digital instrumentation for home maintenance, agriculture, and industrial applications.
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For models like the SALT-9953, calibration is typically done using standard buffer solutions (pH 6.86, 4.00, 9.18). Dip the electrode into the solution and long-press the calibration button (‘CAL’) for 5 seconds until the device enters automatic correction mode.
Many smart JUANJUAN water monitors use the Tuya Smart app. Download the app, register, and then long-press the Wi-Fi/connection key on the device until the icon flashes to pair with your phone.
The JUANJUAN HW-710 wall scanner and stud finder typically operates on a standard 9V battery, which is installed in the compartment on the back of the unit.
If an error code (such as E1) appears or parameters need resetting, press the SET key when the buzzer sounds to restore default manufacturer settings.