HANNA GroLine Portable Waterproof pH/EC/TDS Meter (High Range)
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Your All-in-One Solution for Accurate Water Quality Testing
The HI991301 Portable Waterproof pH/EC/TDS Meter is ideal if you need a reliable, all-in-one solution for water quality testing, manufacturing, or environmental monitoring. With its rugged, waterproof design, it performs well in tough conditions while delivering precise pH, EC, TDS, and temperature readings. Easy calibration, long battery life, and a portable case make it perfect for professionals who need accurate, on-the-go measurements with minimal setup and maintenance.
- Features & Benefits
- Product Specifications
- What is included?
- Warranty Policy
HANNA GroLine Portable Waterproof pH/EC/TDS Meter (High Range)
The HI991301 Portable Waterproof pH/EC/TDS Meter combines three essential measurements—pH, EC/TDS, and temperature—into one compact, rugged device. Built for durability and accuracy, it’s perfect for both fieldwork and laboratory use. With a waterproof design, easy calibration, and replaceable probe, it ensures reliable readings and long-term performance in a variety of testing environments.
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Measures pH, EC/TDS, and temperature with a single probe. -
IP67-rated body for reliable performance in harsh environments.
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Simplifies attachment and removal for easy maintenance.
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Hassle-free pH and EC/TDS calibration with included solutions.
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Up to 1400 hours of continuous use with auto-shutoff.
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Compact size with protective carrying case for on-the-go testing.
The Ultimate Portable Water Testing Tool
The HANNA GroLine Portable Waterproof pH/EC/TDS Meter (High Range) is the perfect choice for professionals seeking accurate, on-the-go water quality testing. With its rugged waterproof design, 3-in-1 probe, and easy calibration, it delivers precise measurements in any environment. Ideal for agriculture, hydroponics, and environmental monitoring, it ensures reliable results while simplifying testing and maintenance.
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 Portable Waterproof pH/EC/TDS Meter (High Range) | |
|---|---|
| Brand | HANNA Instruments |
| Model | HI991301 |
| pH Range | -2.00 to 16.00 pH / -2.0 to 16.0 pH |
| pH Resolution | 0.01 pH / 0.1 pH |
| pH Accuracy @ 25°C (77°F) | ±0.02 pH / ±0.1 pH |
| pH Calibration | Automatic, 1 or 2 points with two buffer sets (standard: 4.01, 7.01, 10.01 or NIST: 4.01, 6.86, 9.18) |
| mV Range | ±825 mV (pH-mV) |
| mV Resolution | 1 mV |
| mV Accuracy | ±1 mV (pH-mV) |
| Temperature Range | -5.0 to 105.0 °C / 23.0 to 221.0 °F |
| Temperature Resolution | 0.1 °C / 0.1 °F |
| Temperature Accuracy @ 25°C (77°F) | ±0.5 °C / ±1.0 °F |
| EC Range | 0.00 to 20.00 mS/cm |
| EC Resolution | 0.01 mS/cm |
| EC Accuracy @ 25°C (77°F) | ±2% F.S. |
| EC Calibration | Automatic, one-point at 12.88 mS/cm |
| TDS Range | 0.00 to 10.00 ppt |
| TDS Resolution | 0.01 ppt (g/L) |
| TDS Accuracy @ 25°C (77°F) | ±2% F.S. |
| TDS Conversion Factor | Selectable from 0.45 to 1.00, in 0.01 increments |
| TDS Calibration | Automatic, one-point at 6.44 ppt (CONV=0.5) or 9.02 ppt (CONV=0.7) |
| Temperature Compensation | Automatic for pH, EC, and TDS with selectable β from 0.0 to 2.4 %/°C in 0.1 increments |
| Power Supply | 1.5V AAA batteries (3 pcs.) |
| Battery Life | Up to 1400 hours of continuous use |
| Auto-Off Feature | 8 or 60 minutes, or disabled |
| Environment | 0 to 50 °C (32 to 122 °F), RH max. 100% |
| Dimensions | 154 x 63 x 30 mm (6.1 x 2.5 x 1.2 inches) |
| Weight | 196 g (6.91 oz.) with batteries |
| Recommended Probe | HI12883 pH/EC/TDS probe with built-in temperature sensor and 1m (3.3') cable |
What is included?
It includes:
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HI991301 Multiparameter Meter -
HI12883 3-in-1 Probe with Built-In Temperature Sensor
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pH 4.01 & 7.01 Buffer Sachets
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EC/TDS Calibration Standards (12880 µS/cm & 6.44 ppt)
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Electrode Cleaning Solution (2 Sachets)
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100 mL Beaker for Sample Testing
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AAA Alkaline Batteries (3 pcs.)
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Rugged Carrying Case
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Calibration Certificate (Meter & Probe)
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Instruction Manual
Warranty Policy
Please check out the manufcaturers website for Warranty related issues.
