Portable Dissolved Oxygen Meter - Range: 0.00~19.99mg/l, Resolution: 0.01mg/l , Dimensions: 123ã—72ã—33mm, Color: White, Temperature: 0~45â°c, Humidity: ≤95%

Portable Digital Conductivity Tester - Plastic, 150x20x27mm | 0~19.99ms/cm Range, 46g Weight, Automatic Temperature Compensation, 95% Humidity Resistance, 4-Digit LCD Display

KL-061 Handheld pH Meter - 155x31x16 mm, Lightweight 60g Design | Automatic Temperature Compensation, Easy-to-Read Display, Pocket-Sized Green Device

KL-009 III pH and Temperature Water Meter - 170x36x23 mm, Red | Dual-Level LCD, Automatic Temperature Compensation, High Sensitivity Probe, Lightweight 91g

Kl-Phs25c Bench pH/mV and Temperature Meters - Plastic, 210x204x64mm, White | pH: 0.00-14.00, mV: -1999mV-1999mV, Temp: 0-100°C, Accurate to 0.01 pH & 0.5°C

Light Weight KL-035Z Waterproof pH and Temperature Meter

Portable and Light Weight KL-98102 Economical pH Tester

PH-097 Waterproof Handheld pH Meter - 180x45x30mm, Dual-Level LCD Display | Automatic Temperature Compensation, Digital Calibration, Battery Saver Feature

Ec-1383B Online EC Monitor - 4-Digital LCD, 0~19.99ms/cm Measuring Range, 95% Humidity Tolerance, Black Color, 60x55x23mm Size, Lightweight 60g Design, Automatic Temperature Compensation

Battery Operated KL-169-B ORP Redox Tester - Measuring Range -1999~1999mV, Accuracy 5mV, Resolution 1mV, Size 157mm×27mm×20mm, Weight 46g, Multi-Color Designs, Industrial Use

Portable ORP-2026 Waterproof Soil ORP and Temperature Meter