The Hanna Instruments HI 9813-6N pH/EC/TDS/°C Portable Meter is specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries. 

This versatile multiparameter portable meter is water resistant and features an extra large LCD that clearly displays the factor being measured.

It includes an HI 1285 series probe that features a fiber junction and gel electrolyte making it ideal for testing fertilizer solutions!

The Hanna HI 9813-6N is a pH/EC/TDS meter that is simple to use for taking pH, mS/cm, ppm and temperature readings in the °C. This multiparameter tool incorporates the CAL CHECK™ feature that allows you to easily check the probe calibration status at any time. You can switch parameters with a touch of a button.

Calibration is fast and easy using the adjustment knobs located on the front of the meter. Calibration guides are shown right on the LCD display!

Furthermore it has BEPS (Battery Error Protection System) that alerts you when low battery power could adversely affect readings. (Battery life is displayed on startup.) Also gives you Automatic Temperature Compensation for both pH and conductivity.

The Hanna Instruments HI 9813-6N comes with:

HI 1285-6 combination probe with DIN connector
3.3' cable
Starter set of calibration and cleaning solution sachets
Check solution sachet battery
Instructions

Specifications:

pH range - 0.0 to 14.0 pH
EC range - 0.00 to 4.00 mS/cm
TDS range - 0 to 1999 ppm (mg/L)
Temperature range - 0.0 to 60.0°C
pH accuracy @ 68°F - ±0.1 pH
EC accuracy - ±2% F.S. mS/cm
TDS accuracy - ±2% F.S. ppm
Temperature accuracy - ±0.5°C
Battery type - (1) 9V
Battery life - approximately 150 hours of continuous use
Environment temps - 32 to 122°F
Dimensions - 5.7" tall x 3.1" wide x 1.5" deep
Weight - 8.1 oz