HM Digital - Pro Series COM-300 Pen Style pH/TDS/Temp Meter

Brand: HM Digital

HM Digital Pro Series COM-300 Pen Style pH/TDS/Temp Meter

The HM Digital COM-300 is a waterproof Professional Series combo meter that measures pH, electrical conductivity (EC), total dissolved solids (TDS) and temperature with a single pen. Five selectable scales - pH, uS, mS, ppm 0.5 (NaCl) and ppm 0.7 (442) - and automatic temperature compensation make it a one-tool check for nutrient solutions and process water.

The COM-300 suits growers and facility operators who want pH and EC/TDS from one instrument during reservoir checks, irrigation audits and water-treatment rounds in indoor cultivation and controlled-environment agriculture. The IP-67 housing is submersible and floats, calibration is push-button for both pH and EC/TDS, and the combined pH/EC sensor (model SP-C3) is replaceable.

Available Options

• COM-300 meter - ships with translucent cap, 2 AAA alkaline batteries, pH 4 and pH 7 calibration solutions, pH storage solution and lanyard

Key Features

• Measures pH, EC, TDS and temperature
• Five scales: pH, uS, mS, ppm 0.5 (NaCl) and ppm 0.7 (442)
• pH range 0.0 - 14.0; EC range 0 - 9990 uS (0 - 9.99 mS); TDS range 0 - 8560 ppm (0.7 scale) or 0 - 5000 ppm (0.5 scale)
• Resolution 0.1 pH; 1 uS (0 - 999) / 10 uS (1000 - 9990); 1 ppm / 10 ppm TDS; 0.1 deg temperature
• Accuracy +/- 0.1 pH, +/- 2% EC/TDS, +/- 1 deg C/F
• Automatic temperature compensation (ATC) using three temperature coefficients
• Push-button pH auto-calibration at pH 4, 7 or 10 with fine-tuning; EC/TDS digital calibration to any point in range
• IP-67 waterproof housing - submersible and floats
• Replaceable pH/EC/TDS/temp sensor (model SP-C3) with glass pH bulb and reference tube
• Auto-off after 5 minutes, data-hold and low-battery indicator; approx. 100 hours of battery life
• 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 in)
• One-year limited warranty on the meter; six-month warranty on the SP-C3 sensor

Ideal Applications

• Combined pH and EC/TDS checks of hydroponic nutrient solutions
• Fertigation and dosing verification
• Irrigation, RO and source water testing
• Aquaculture and general water-treatment testing