Hanna Instruments DiST® 4 Waterproof EC Tester (0.00-20.00 mS/cm) HI98304 ph the battery symbol on the

the  battery symbol on the LCD blinks to indicate a low battery condition

which you can access via web browser

The system can be easily extended to add more growing points by adding additional Autopot Hydrotrays additional units to the same supply tank via tubing and joiners

total dissolved solids (TDS) and temperature

Hanna Instruments DiST® 4 Waterproof EC Tester (0.00-20.00 mS/cm) HI98304 ph the battery symbol on theThe Hanna Instruments HI98304 DiST 4 is a high range electrolytic conductivity (EC) tester that can measure up to 20. 00 mS cm making it ideal for a variety of applications including water treatment, boilers and cooling towers, agricultural including hydroponics, and general laboratory use. The DiST 4 is a rugged and reliable pocket sized tester for use in the lab or field. This modern looking meter is only 0. 7' thick and extremely ergonomic, fitting