7 in 1 Digital LCD PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter Pen Product Feature: High precision: The high-sensitivity probe provides you with a complete measurement range, multi-function switching at will, with data retention function and low-battery indication function. Automatic Shutdown Function and Large Screen Display: The automatic shutdown function automatically turns off the power after 5 minutes without any operation to save power. It adopts a backlit high-definition display screen to display 4-digit values and the corresponding physical quantity units. PH Tester Wide Range of Applications: Versatile, ideal for home and laboratory pH testing applications including drinking water, swimming pools, ponds, beer brewing, kombucha, aquariums, hydroponics, laboratories, food processing, and more. 7 in 1: The water quality test pen is a 7 in 1 style. PH, TDS, EC, salinity, ORP, temperature, SG can be measured simultaneously with high precision. The measurement range is large and wide, which can measure freshwater salinity and sea salt, and measure water quality in all directions to ensure healthy water quality. 7 in 1 Water Quality Test Pen: PH value 0.01-14.00ph TDS value 0-200000ppm/10.1-200.0ppm EC value water conductivity 0-200000㎲/cm Salinity salinity 0.01-20.00%; suitable intake salinity value for human body is 0.900% ORP negative potential ±1999MV; an important indicator of water quality, which can reflect the ecological environment of aquatic systems Temperature 0.1-60.0°C/32.0-140°F; free switch between degrees Celsius and Fahrenheit The specific gravity of S.G seawater is 1.000-1.222; the density of seawater in different regions is usually 1.02-1.07, and the weight of Rongjie salt is about 3.5% on average. Product Specification: Type: 7 in 1 Water Quality Test Pen Color: Green Material: ABS Dimensions: 185x37x24mm (7.28x1.46x0.94in) Power Supply: LR44*3 (included) Display: Support Backlight Waterproof Grade: IP67 Features: Automatic shutdown, large screen display, high precision Function: PH, TDS, EC, salinity, ORP, temperature, SG Application: Drinking water, swimming pools, ponds, beer brewing, kombucha,etc Package Included: 1 x 7-in-1 Water Quality Test Pen 1 x Instruction Manual