HM Digital Pen style TDS/Temp meter with case

TDS-3: Handheld TDS Meter with Carrying Case

The TDS-3, with its robust construction, is an excellent tool suitable for a variety of applications including water purification, hydroponics, and industrial wastewater treatment. It includes a black vinyl carrying case to ensure protection when stored in a toolbox.

Features
It automatically shuts off after 10 minutes of inactivity.
Equipped with an integrated digital thermometer.
Comes complete with a handy carrying case featuring a belt clip.
Comes pre-calibrated with a 342 ppm NaCl solution, and recalibration can be done using a mini-screwdriver.

Specifications
TDS ranges from 0 to 9990 ppm (mg/L).
Temperature range: 0–80 degrees Celsius.
Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (represented by a 'x10' icon).
Temperature Resolution: 0.1 degrees Celsius.
Accuracy: +/-2% for EC-to-TDS. Conversion Factor: NaCl (average: 0.5).
ATC: Built-in Sensor for Automatic Temperature Compensation ranges from 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit).
Power source: two 1.5V button cell batteries (included) (LR44 or similar).
Battery life: 1,000 hours of use
Dimensions: 15.5 x 3.1 x 2.3 cm (6.1 x 1.25 x 1 inch).
Weight with case: 76.5 g (2.7 oz).
Weight without the case: 56.7 g (2 oz).