hydroponics systems

and depending on the frequency of use and the type of application

2 (AAA) alkaline batteries

calibrate to 7

C-342: TDS and EC Calibration Solutions

HM Digital SB-1500H Salt and Temperature Meter - Waterproof with Measuring Spoon meter calibration hydroponics systemsThis Newly released SB 1500H is ideal for measuring salt content in food, pools, salt water aquariums and many more. FEATURES: Salt meter with measuring spoon (percentage of salt) Ideal for pools, saltwater aquariums and good preparation Large LCD display horizontal angle for easy viewing Waterproof housing Automatic Temperature Compensation Product Description Range: 0. 01% to 10. 0% (0ppm to 100,000ppm with NaCl) Temp Range: 1 99 C (ATC Range)