The LSM-100 commercial-grade EC/TDS monitor features:

A large, easy-to-read display
Easy panel mounting with 20 mm hole.
1/2” mnpt sensor probe with 3 meter-cord
displays TDS in ppm or ppt, and EC in µS or mS
Extended battery life for continuous monitoring
Range: 0-9999 ppm (mg/L); 0-10.0 ppt (g/L) EC: 0-9999 µS; 0-20.00 mS
Accuracy: +/- 2%
Resolution: 0-99.9: 0.1 ppm/µS; 100-9999: 1 ppm/µS
ATC: Yes, 34 to 149˚F (1 – 65˚C)
Calibration: Digital to any point
EC to TDS Factor: NcCl (0.5)
Sensors: 1/2” MNPT threaded
Sensor Cable Length: 3 m (9.8 ft.) cable
Power Source: Two 1.5V AA batteries (included)
Battery Life: Approx. 2 years
Dimensions: 4.7 x 3 x 1 inch (12 x 7.5 x 2.6 cm)
Weight: 7 Oz. (197 g)
Limited Manufacturer's Warranty: One Year