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Hanna Instruments HI-991404 Combo pH, EC/TDS/Temperature Monitor
Model HI 991404: A large backlit LCD continuously monitors the three most important nutrient parameters in greenhouse, hydroponics and horticultural applications.
This Hanna Instruments Combo GroChek is waterproof, has adjustable TDS ratio and ß and an external 12 VDC power supply.
It has an advanced, non-cloggin, double-junction pH electrode and a rugged conductivity probe that will stand up to the most aggressive environments.
The Combo GroChek also provides a stability indicator for peace of mind.
Read Instruction Manual (PDF format - Lots of detail.)
Hanna Instruments Combo pH, EC/TDS/Temp [HI 991404]
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$192.95 |
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Replacement pH Electrode with BNC comm. & 2 m cable [HI 1293D]
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$69.95 |
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Combo Pack: pH 4.0 AND 7.0 Calibration Solution - 8 oz. each
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$12.95 |
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pH 7.0 Calibration Solution - 8 oz.
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$6.95 |
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pH 7.0 Calibration Solution - 32 oz.
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$24.95 |
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Storage Solution - 230 ml.
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$9.95 |
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Electrode Cleaning Solution - 230 ml.
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$9.95 |
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