6 in one meter

[peewee]

i see on ebay a 6 in one meter it test pH, °C, CF, EC,°F, and TDS
i know what ph, tds is what are the other ones?
also was wondering if this is a good meter
6 in1 pH-meter tester PH EC CF TDS °C °F multifunzional - (item 230155939856 end time Aug-04-07 23:44:59 PDT)

[scooterman]

For the money your way better off with this, that thing your looking at is nothing but junk, please don't get it.

TDS Meters
$50.00 - HM DIGITAL COM-100 TDS METER-WATERPROOF EC /TDS /TEMP COMBO METER
FEATURES COM 100: WATERPROOF EC / TDS / TEMP COMBO METER

• Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature
• Three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor
• Automatic Temperature Compensation (ATC) using three temperature coefficients
• Waterproof housing
• Measurement Range: 0-9990 µS; 0-8560 ppm (auto-ranging)
• Digital Calibration (push button)
• Auto-off function, data-hold function and low-battery indicator
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading
• Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver
• Includes a cap, batteries and lanyard