I use this specific EC sensor to measure EC rates in my water tank. However, I observe a 200 to 300 rate drop every night when lights get off and the same rate up when lights occur every morning. Is it expected to happen? Does the EC sensor get affected by light if that light gets in the water tank? I’d appreciate any help here.
p.s.: The rate doesn’t instantly drop or increase when lights get off and on, respectively. It takes about 2-3h to get there.