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FAQ Section

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What makes the HI98131 ideal for hydroponic growers? \n
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It combines pH, EC, TDS, and temperature measurements in one device, helping growers monitor nutrient levels quickly and accurately.
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How does the Quick Cal feature work? \n
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Quick Cal allows you to calibrate both pH and EC with a single solution, saving time and simplifying the calibration process.
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Can the pH electrode be replaced? \n
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Yes, the HI98131 comes with a replaceable pH electrode, making maintenance simple and extending the life of your tester.
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What is the difference between the 0.5 and 0.7 TDS conversion factors? \n
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The 0.5 factor means 1000 µS/cm equals 500 ppm, while the 0.7 factor means 1000 µS/cm equals 700 ppm, allowing flexibility based on your preferred standard.
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How does the automatic temperature compensation benefit readings? \n
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It adjusts pH, EC, and TDS readings automatically to account for temperature changes, ensuring accuracy in varying environments.
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What is the battery life like on this tester? \n
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The HI98131 provides up to 100 hours of continuous use and features an auto-off function and low battery indicator to conserve power.
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Is this tester suitable for outdoor agricultural use? \n
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Yes, its waterproof, rugged design and wide temperature range make it suitable for outdoor agriculture and greenhouse environments.
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Specifications \"\"\n

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HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester\"\"
Product NameHI98131 GroLine Waterproof Pocket Tester
SKUHI98131
pH Range0.00 to 14.00 pH
pH Accuracy±0.10 pH
Temperature Range0.0 to 60.0 °C (32.0 to 140.0 °F)
EC Range0.00 to 6.00 mS/cm
TDS Range0 to 3000 ppm (0.5 CF), 0 to 3999 ppm (0.7 CF)
Selectable Conversion Factors0.5 or 0.7
Power Supply1.5V batteries (4 pcs.)
Battery LifeApproximately 100 hours of continuous use
Dimensions163 x 40 x 26 mm (6.4 x 1.6 x 1.0 in.)
Weight95 g (3.4 oz)
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What is included? \"\"\n

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It includes:

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  • \n\"\" HI98131 GroLine Waterproof Pocket Tester\n
    • \n
  • \n\"\" HI73127 Replaceable pH Electrode\n
    • \n
  • \n\"\" HI73128 Electrode Removal Tool\n
    • \n
  • \n\"\" Set of 4 Batteries\n
    • \n
  • \n\"\" Instructions Manual\n
    • \n
  • \n\"\" Quality Certificate\n
    • \n
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\"\"
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Warranty Policy

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Please check out the manufcaturers website for Warranty related issues.

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HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester
HomeStore

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

$249.99
HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester—
$249.99

The Story

Simplify Hydroponic Testing with a 4-in-1 Solution

The HI98131 GroLine Waterproof Pocket Tester combines pH, EC, TDS, and temperature measurements in one portable device. With its slim, lightweight design and waterproof build, this tester is perfect for hydroponics, greenhouses, and agricultural use. Easy calibration, precise readings, and a user-friendly interface make it an essential tool for growers seeking consistent and reliable results.

  • Features & Benefits
  • Product Specifications
  • What is included?
  • Warranty Policy

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

Engineered for efficiency, the HI98131 delivers reliable measurements in any growing environment. Its Quick Cal function, selectable conversion factors, and replaceable electrode ensure accuracy while saving time and simplifying maintenance.

  • Measures pH, EC, TDS, and temperature simultaneously.
  • Single-step calibration for pH and EC.
  • Extend the life of your device easily.
  • Choose 0.5 or 0.7 factor for ppm readings.
  • Ideal for humid greenhouse conditions.
  • Conserves energy with alerts for low battery.

Reliable Results in Any Setting

Designed for growers who demand accuracy and durability, the HI98131 ensures your nutrient solutions are perfectly balanced. Its compact, rugged design and intuitive controls make it a trusted companion for professional growers and hobbyists alike, reducing guesswork and improving crop health.

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.

Excellent 4.8 out of 5 based on 1,247 reviews
If I could rate 6 stars I would!
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!!
Reviewer
Jim D
Customer service was outstanding great…
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
Reviewer
Glenn Appleton
The machine is doing just what my…
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.
Reviewer
Freddie
Fantastic
Great prices, fantastic customer service, and mind blowing shipping! Incredible. Will be using again and telling anyone in need.
Reviewer
Kar
←
→

FAQ Section

What makes the HI98131 ideal for hydroponic growers?
It combines pH, EC, TDS, and temperature measurements in one device, helping growers monitor nutrient levels quickly and accurately.
How does the Quick Cal feature work?
Quick Cal allows you to calibrate both pH and EC with a single solution, saving time and simplifying the calibration process.
Can the pH electrode be replaced?
Yes, the HI98131 comes with a replaceable pH electrode, making maintenance simple and extending the life of your tester.
What is the difference between the 0.5 and 0.7 TDS conversion factors?
The 0.5 factor means 1000 µS/cm equals 500 ppm, while the 0.7 factor means 1000 µS/cm equals 700 ppm, allowing flexibility based on your preferred standard.
How does the automatic temperature compensation benefit readings?
It adjusts pH, EC, and TDS readings automatically to account for temperature changes, ensuring accuracy in varying environments.
What is the battery life like on this tester?
The HI98131 provides up to 100 hours of continuous use and features an auto-off function and low battery indicator to conserve power.
Is this tester suitable for outdoor agricultural use?
Yes, its waterproof, rugged design and wide temperature range make it suitable for outdoor agriculture and greenhouse environments.

Specifications

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester
Product Name HI98131 GroLine Waterproof Pocket Tester
SKU HI98131
pH Range 0.00 to 14.00 pH
pH Accuracy ±0.10 pH
Temperature Range 0.0 to 60.0 °C (32.0 to 140.0 °F)
EC Range 0.00 to 6.00 mS/cm
TDS Range 0 to 3000 ppm (0.5 CF), 0 to 3999 ppm (0.7 CF)
Selectable Conversion Factors 0.5 or 0.7
Power Supply 1.5V batteries (4 pcs.)
Battery Life Approximately 100 hours of continuous use
Dimensions 163 x 40 x 26 mm (6.4 x 1.6 x 1.0 in.)
Weight 95 g (3.4 oz)

What is included?

It includes:

  • HI98131 GroLine Waterproof Pocket Tester
  • HI73127 Replaceable pH Electrode
  • HI73128 Electrode Removal Tool
  • Set of 4 Batteries
  • Instructions Manual
  • Quality Certificate

Warranty Policy

Please check out the manufcaturers website for Warranty related issues.

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester - Image 2

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester - Image 3

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester - Image 4

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester - Image 5

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

Description

Simplify Hydroponic Testing with a 4-in-1 Solution

The HI98131 GroLine Waterproof Pocket Tester combines pH, EC, TDS, and temperature measurements in one portable device. With its slim, lightweight design and waterproof build, this tester is perfect for hydroponics, greenhouses, and agricultural use. Easy calibration, precise readings, and a user-friendly interface make it an essential tool for growers seeking consistent and reliable results.

  • Features & Benefits
  • Product Specifications
  • What is included?
  • Warranty Policy

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

Engineered for efficiency, the HI98131 delivers reliable measurements in any growing environment. Its Quick Cal function, selectable conversion factors, and replaceable electrode ensure accuracy while saving time and simplifying maintenance.

  • Measures pH, EC, TDS, and temperature simultaneously.
  • Single-step calibration for pH and EC.
  • Extend the life of your device easily.
  • Choose 0.5 or 0.7 factor for ppm readings.
  • Ideal for humid greenhouse conditions.
  • Conserves energy with alerts for low battery.

Reliable Results in Any Setting

Designed for growers who demand accuracy and durability, the HI98131 ensures your nutrient solutions are perfectly balanced. Its compact, rugged design and intuitive controls make it a trusted companion for professional growers and hobbyists alike, reducing guesswork and improving crop health.

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.

Excellent 4.8 out of 5 based on 1,247 reviews
If I could rate 6 stars I would!
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!!
Reviewer
Jim D
Customer service was outstanding great…
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
Reviewer
Glenn Appleton
The machine is doing just what my…
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.
Reviewer
Freddie
Fantastic
Great prices, fantastic customer service, and mind blowing shipping! Incredible. Will be using again and telling anyone in need.
Reviewer
Kar
←
→

FAQ Section

What makes the HI98131 ideal for hydroponic growers?
It combines pH, EC, TDS, and temperature measurements in one device, helping growers monitor nutrient levels quickly and accurately.
How does the Quick Cal feature work?
Quick Cal allows you to calibrate both pH and EC with a single solution, saving time and simplifying the calibration process.
Can the pH electrode be replaced?
Yes, the HI98131 comes with a replaceable pH electrode, making maintenance simple and extending the life of your tester.
What is the difference between the 0.5 and 0.7 TDS conversion factors?
The 0.5 factor means 1000 µS/cm equals 500 ppm, while the 0.7 factor means 1000 µS/cm equals 700 ppm, allowing flexibility based on your preferred standard.
How does the automatic temperature compensation benefit readings?
It adjusts pH, EC, and TDS readings automatically to account for temperature changes, ensuring accuracy in varying environments.
What is the battery life like on this tester?
The HI98131 provides up to 100 hours of continuous use and features an auto-off function and low battery indicator to conserve power.
Is this tester suitable for outdoor agricultural use?
Yes, its waterproof, rugged design and wide temperature range make it suitable for outdoor agriculture and greenhouse environments.

Specifications

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester
Product Name HI98131 GroLine Waterproof Pocket Tester
SKU HI98131
pH Range 0.00 to 14.00 pH
pH Accuracy ±0.10 pH
Temperature Range 0.0 to 60.0 °C (32.0 to 140.0 °F)
EC Range 0.00 to 6.00 mS/cm
TDS Range 0 to 3000 ppm (0.5 CF), 0 to 3999 ppm (0.7 CF)
Selectable Conversion Factors 0.5 or 0.7
Power Supply 1.5V batteries (4 pcs.)
Battery Life Approximately 100 hours of continuous use
Dimensions 163 x 40 x 26 mm (6.4 x 1.6 x 1.0 in.)
Weight 95 g (3.4 oz)

What is included?

It includes:

  • HI98131 GroLine Waterproof Pocket Tester
  • HI73127 Replaceable pH Electrode
  • HI73128 Electrode Removal Tool
  • Set of 4 Batteries
  • Instructions Manual
  • Quality Certificate

Warranty Policy

Please check out the manufcaturers website for Warranty related issues.

HANNA GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester | Green Thumb Depot