GroLine Waterproof EC/TDS (ppm) Tester
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Simplified EC/TDS Testing for Hydroponics
The HI98318 GroLine Waterproof EC/TDS Tester is designed to make measuring fertilizer concentration in hydroponic nutrient solutions quick and easy. With a slim, ergonomic design and an extra-large display, this modern tester provides precise EC, TDS, and temperature readings, ensuring you always know the health of your nutrient solution.
- Features & Benefits
- Product Specifications
- What is included?
- Warranty Policy
HANNA GroLine Waterproof EC/TDS (ppm) Tester
Built for hydroponic growers, this tester features advanced graphite sensors for reduced polarization and a fast, automatic temperature compensation system. Its two-button operation makes calibration and measurement simple, while its waterproof construction ensures long-term durability.
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Reduces polarization effects for more accurate readings. -
Power and calibration made simple.
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Fast single-point calibration with Hanna Quick Cal solution.
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Switch between 0.5 (500 ppm) or 0.7 (700 ppm) EC to TDS conversion.
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Built for greenhouse and hydroponic environments.
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Long-lasting performance for extended use.
Precision Made Easy for Hydroponic Growers
This pocket tester provides essential measurements to maintain optimal nutrient balance, helping you prevent plant stress and maximize growth. Its slim design, straightforward operation, and reliable calibration process make it a must-have tool for any grower.
Why HANNA GroLine?
HANNA Instruments delivers precision, durability, and reliability trusted by professionals worldwide. Their rugged, waterproof meters provide accurate, consistent readings in any environment, from agriculture to environmental testing. With easy calibration, replaceable probes, and long battery life, HANNA offers long-term value and portability, ensuring dependable results and confidence in every measurement.
Why Buy From Us?
At GreenThumbDepot, you're not just another sale to a faceless corporation. You're partnering with a team genuinely invested in your success. Our legendary customer service, combined with a promise of unbeatable prices, sets us apart. We're here for you, always.
If I could rate 6 stars I would! My representative Edouard B. has been shockingly responsive! Like - oh my god - an actual SERVICE oriented company. He's dug into my odd connectivity issues I've been having - and following up in an AMAZINGLY timey manner. No shit. You'll be impressed! (And the price was also unbeatable, quick shipping...it's all PERFECT). Thank you Ed!!
Customer service was outstanding great people to deal with they understand your needs and they will do their best to fulfill them there is no way I can complain about them because they are the best help out there.Thanks green thumb depot. I'll definitely order from them again
The machine is doing just what my salesman told it would do (I appreciate you Ed thank you) . The machine is what we need for our new business we're starting up, soon to be llc and licensed. We are getting a lot of clients wanting our services. Ed I will be needing more of your products, thank you again.
Great prices, fantastic customer service, and mind blowing shipping! Incredible. Will be using again and telling anyone in need.
FAQ Section
Specifications 
| HANNA GroLine Waterproof EC/TDS (ppm) Tester | |
|---|---|
| Product Name | HI98318 GroLine Waterproof EC/TDS Tester |
| SKU | HI98318U |
| EC Range | 0.00 to 6.00 mS/cm |
| EC Resolution | 0.01 mS/cm |
| EC Accuracy | ±2% F.S. |
| Calibration | Automatic, single-point (Quick Cal or 1.41 mS/cm standard) |
| Temperature Compensation | Automatic, 0 to 50°C (32 to 122°F) |
| EC to TDS Conversion Factor | Selectable 0.5 (500 ppm) or 0.7 (700 ppm) |
| Temperature Accuracy | ±0.5°C / ±1°F |
| Battery Type / Life | CR2032 Li-ion, approx. 250 hours of continuous use |
| Dimensions | 160 x 40 x 17 mm (6.3 x 1.6 x 0.7 in.) |
What is included?
It includes:
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HI98318 Waterproof EC/TDS Tester
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Protective Cap
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(4) Hanna Quick Cal Calibration Sachets (20 ml each)
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(1) CR2032 Battery
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Instruction Manual
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Quality Certificate
Warranty Policy
Please check out the manufcaturers website for Warranty related issues.
