Brand：
$654.00
SE
HANNA HI981420 Water Quality Tester
0.00~14.00pH0~5000ppm TDS conversion factor 0.5 [500 CF]; 0~7000ppm TDS conversion factor 0.7 [700 CF]
$602.00
SE
HANNA HI8424 Portable pH/ORP/temperature Water Quality Meter
-2.00–16.00pH
Measurement range: PH 2.00 - 16.00pH, ORP 699.9mV, +/-1999mV, built-in three calibrated points, automatic recognition of one or two points calibrated, easy to operate and economical.
If you don't know how to choose "STIP-scan", please consult customer service.