Sa-367 Waterproof Mini Salinity Meter - Plastic And Ms, 160mm × 22mm × 20mm, White | Digital Display, 0-100 Range, 2% Accuracy

KL-033 Waterproof Portable Pen Type pH Meter - 0.00~14.00PH Range, 0.01PH Resolution, 98g Floating Design

Ph-221 Digital pH and Temperature Controller - Measuring Range: pH 0.00-14.00, Temp 0-50°C | 4-Digit LCD Display, Dual Monitoring, Auto Calibration

Dual Level LCD pH & Temperature Tester - 175x41x23mm, Red | Automatic Temperature Compensation, Replaceable Electrodes, Accurate Data Recording

Ph-2981 Online pH EC Temperature Monitor - pH Range: 0.00 ~ 14.00, EC Range: 0 ~ 1999 S/cm, Temp Range: 0 ~ 50°C, Resolution: pH 0.01 | Laboratory Use, Blue Color, 130mm x 70mm x 31mm, 200g Weight

Digital Display DDS-307 Laboratory Conductivity Meter

Digital Type Ph Temperature Meter Dimension(L*W*H): 210X204X64 Millimeter (Mm)

High Accuracy Pen-type pH Meter - 150×27×20 mm, Humidity: ≤95%, Weight: 46 g, Temperature Range: 0~50°C | Fast LCD Display for Accurate Readings

KL Series TDS Conductivity Meter - Waterproof Plastic, Size 175mm x 30mm x 22mm | Digital Display, Automatic Temperature Compensation, Economical, Easy to Use, Floating Design

KL 019 Industrial On-line ORP Controller - 1/4 DIN, 96x96x160 mm, Black | Dual SPDT Relays, 4-20 mA Output, 0~1999 mV Range, 0.1% Accuracy

KL98301/98302/98303/98304 TDS Meter - New Model, 175mm×41mm×23mm Size, 90g Weight | 1ppm Resolution, ±2% Accuracy, Digital Display, 4x1.5v Power Supply