GroLine Nutrient Tester
Official Distributor
An Important Note on Pricing and Returns:
We believe in upfront pricing and fair policies—no hidden fees, no surprises, and easy,
transparent returns. If you're comparing options, we encourage you to review competitors’ fine
print carefully.
We've helped countless customers who had issues elsewhere, and we’re here to make sure that never
happens to you.
Free Shipping
On most orders
Call Us
(833) 416-0375
Mon-Fri 9am-6pm CST
Lowest Price Guranteed
There is never a better price,
we can always price match
No Sales Tax
Absolutely no tax on any purchase
Easy Returns
Always hassle free
Free Shipping
Lowest Price Gurantee
No Sales Tax
Easy Returns
Quick and Reliable Nutrient Measurement for Growers
The HI98330 GroLine Nutrient Tester provides fast and accurate measurement of electrical conductivity (EC) and total dissolved solids (TDS) in hydroponic and agricultural nutrient solutions. With its waterproof, floating design and easy-to-read LED indicators, this tester is perfect for growers looking for a durable, hassle-free solution to monitor plant nutrients.
- Features & Benefits
- Product Specifications
- What is included?
- Warranty Policy
HANNA GroLine Nutrient Tester
Built for convenience, the HI98330 eliminates calibration needs and starts automatically when submerged. Its IP67 waterproof body doubles as a stirring stick, making it both practical and efficient for daily use.
-
Measures EC up to 6.0 mS/cm and TDS up to 4200 ppm. -
Safe for use in wet greenhouse environments.
-
Turns on when placed in solution and off 30 seconds after reading stabilizes.
-
Works as a tester and a stirring stick.
-
24 illuminated lights for easy-to-read results.
-
Alerts you before power runs low.
-
Easy to clean and maintain.
-
Long-term reliability backed by Hanna Instruments.
Simplify Nutrient Monitoring for Healthier Plants
This tester offers fast, no-fuss nutrient measurement, helping growers maintain the right nutrient levels for optimal plant growth. Its rugged design and waterproof construction make it ideal for greenhouse and hydroponic setups.
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 Nutrient Tester | |
|---|---|
| Product Name | HI98330 GroLine Nutrient Tester |
| SKU | HI98330 |
| EC Range | 0.2 to 6.0 mS/cm |
| EC Resolution | 0.1 mS/cm (0.2 to 4.0 mS/cm), 0.25 mS/cm (4.0 to 6.0 mS/cm) |
| EC Accuracy | ±0.1 mS/cm (0.2 to 4.0 mS/cm), ±0.25 mS/cm (4.0 to 6.0 mS/cm) |
| TDS Range | 100–3000 ppm (500 ppm scale), 140–4200 ppm (700 ppm scale) |
| TDS Resolution | 50 ppm (100–2000 ppm), 125 ppm (2000–3000 ppm), 70 ppm (140–2800 ppm), 175 ppm (2800–4200 ppm) |
| TDS Accuracy | ±4% of reading ±1 resolution point |
| Automatic Shut-Off | 30 seconds after stable measurement |
| Battery Type / Life | 3 × 1.5V AA alkaline batteries / approx. 3 years (10 measurements/day) |
| Environment | 0 to 50°C (32 to 122°F) |
| Dimensions | 444 mm (17.48 in.) length, Ø 30 mm (1.18 in.) diameter |
| Weight | 265 g (9.3 oz.) with batteries |
What is included?
It includes:
-
HI98330 GroLine Nutrient Tester
-
Quick Reference Guide
-
Instrument Quality Certificate
Warranty Policy
Please check out the manufcaturers website for Warranty related issues.
