TDS, EC + Temp.: COM-100

Manufacturer: HM Digital

Water proof and it floats

COM-100 can be seen after 3 min. in this video: What meter to choose? 

Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. The COM-100 is a professional level EC/TDS meter at an unbeatable price.

I have read several american praising this meter and a few reviews on amazon.

• Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature.
• Three different non-linear EC-to-TDS conversion factors (KCl, 442TM, NaCl).
• Automatic Temperature Compensation (ATC) using three temperature coefficients
• Waterproof housing (IP-67 rating)
• Measurement Range: 0-9990 µS; 0-8560 ppm
• Digital Calibration (push button) to any point within the meter's range
• Auto-off function, data-hold function and low-battery indicator
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading.
• Replaceable Sensor (model SP-C1)
• Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution. The meter can be recalibrated with a calibration solution and the push buttons.
• Includes a cap, batteries and lanyard

SPECIFICATIONS

• EC Range: 0-9990 µS
• TDS Range: 0-8560 ppm (mg/L)
• Temperature Range: 0-80 °C; 32-176 °F
• Resolution: 0-99: 0.1 µS/ppm; 100-999: 1 µS/ppm; 1000-9990: 10 µS/ppm. Temp. resolution is 0.1 °C/F
• Accuracy: +/- 2%
• EC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM or NaCl solutions, selected by the user.
• Calibration: Digital calibration by push button.
• Probe: Detachable platinum electrodes
• Housing: IP-67 Waterproof (submersible; floats)
• Power source: 3 x 1.5V button cell batteries (included) (model LR44 or equivalent)
• Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)
• Weight: 90.7g (3.2 oz)