VIVOSUN 5-in-1 Digital PH Meter with PHSalinityTDSECTemperature Function, Backlight Screen, IP67 Waterproof for Hydroponics, Home Drinking, Pool and Aquarium

The VIVOSUN 4-in-1 Digital pH Meter is an affordable and accurate water quality tester suitable for hydroponics, household drinking and aquariums. With a 0-14.0 pH measurement range and ±0.1 pH accuracy, it offers fast and reliable readings. However, several customers have reported accuracy issues, especially with temperature readings, and problems with calibration. While some customers have praised it for its easy-to-use design, others have had difficulty with calibration and claim that the calibration packets don't work. Additionally, replacement tips and probes are not readily available. Overall, this product provides an affordable alternative to more expensive water quality testers; however, the accuracy and reliability issues might be a significant downside for some users.