Hanna Combo HI98129 pH/EC/TDS/Temperature Tester with Low Range EC non-hazardous pH Up Works with any dosing system:

Works with any dosing system: Dosatron

Its pressure-sensistive backing makes it incredibly durable—even in hot temperatures and dusty environments—and the easy-cut roll makes dispensing quick and simple

Capacity is still 50 gallons

1x ½” click-fit tank adaptor & filter

000 micromol/m2/s Calibration Uncertainty Within plus or minus 5% Long-Term Drift Less than 2% per year Repeatability Less than 0

Hanna Combo HI98129 pH/EC/TDS/Temperature Tester with Low Range EC non-hazardous pH Up Works with any dosing system:The HI 98129 Combo waterproof tester offer high accuracy pH, EC TDS and temperature measurements in a single tester! No more switching between meters for your routine measurements. The waterproof Combo (it even floats) has a large easy to read, dual level LCD and automatic shut off. pH and EC TDS readings are automatically compensated for the effects of temperature (ATC). This technologically advanced tester has a replaceable pH electrode cartridge