PH117M Digital PH EC CF TDS Temp Meter Water Quality Tester 5-in-1 Multifunction Smart Monitor Analysis Control EU Plug 220V Features: Use to measure the PH / Temperature / EC / CF / TDS of solution. Easy calibration of pH and TDS with just a mini-screwdriver. Can online monitoring for a long time. Can work continuously more than 10 hours of power outage or outdoor without power after charging the battery for 2-3 hours. Clear LCD with backlight. Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Automatic temperature compensation. CE Certificated to Offer Safer and Precise Measurement. Easy to use and provides instant display of results. Specifications: Range: pH: 0.00 ~ 14.00pH Temperature: 0C ~ 50C(32F ~ 122F) EC: 0.00 ~ 19.99EC CF: 0.0 ~ 199.9CF TDS: 10 ~ 9990ppm Resolution: pH: 0.01pH Temperature:0.1C EC: 0.01EC CF: 0.1CF TDS: 10ppm Accuracy: pH: 0.1pH Temperature 1.0C EC,CF,TDS:2%F.S Temperature Compensation: 0C ~ 50C (32F ~ 122F) Working temperature: 0C ~ 50C (32F ~ 122F) Power supply: DC 6V (Power Adapter Usable)