1pc pH Sensor Module V1.1 + 1pc E-201-C-9 pH Probe for Uno R3 board mega2560 AVR 51 pH shield Rechargeable Features: Heating voltage: 5 ± 0.2V (AC · DC) Current :5-10mA Detectable concentration range: pH 0-14 Test the temperature range :0-80° Response time: ≤1 min Stabilization time: 60S Component Power: 0.5W Internal resistance:≤250Ω Zero-Bit:7±0.25 pH Alkali Read more about pH Sensor Module V1.1 for Uno R3 board mega2560 AVR 51 pH shield Rechargeable[…]