Model Number: 740/741 Brand Name: TLead Key Specifications/Special Features: Features:Includes an internal digital thermometer (celsius)Smallest and lightest TDS meter available on the marketHold function: saves measurements for convenient reading andrecordingAuto-off function: turns off meter after 10 minutes of non-useto conserve batteries

Dual range: measures from 0 to 999ppm

With resolution of 1ppm from 1,000 to 9,990ppm

Resolution: 10ppm

Indicated by a blinking x10 image

Factory calibrated: meters are calibrated with a 342ppm NaClsolution

Meters can be re-calibrated with a mini-screwdriver

Recommended for aquariums/aquaculture,horticulture/hydroponics, pools/spas, and water coolerprofessionals

Specification:

• TDS range: 0 to 9,990ppm
• Temperature range: 0 to 80°C
• Resolution: 1ppm, 1°C
• Accuracy: +/- 2%
• ATC: built-in sensor for automatic
• Temperature compensation: 1 to 50°C (33 to 122°F)
• Power source: 2 x 1.5V button cell batteries (included)
• Battery life: 1,000 hours of usage
• Dimensions: 14 x 2.3 x 1.5 cm (5.5 x .9 x .55 inches)
• Weight: 34g (1.2 oz)