
Hanna (HI98303) DiST3 Conductivity EC Tester, 1 µS-cm Resolution, Range up to 1990 µS-cm Meter
HI98303 DiST3 Conductivity EC Tester
Pocket-sized conductivity meter with 1 µS/cm resolution and automatic temperature compensation for reliable water quality monitoring up to 1990 µS/cm
The Hanna HI98303 DiST3 delivers accurate conductivity readings with 1 µS/cm resolution across a range of 0 to 1990 µS/cm, making it ideal for testing RO water, distilled water, and low-conductivity filtration systems. The redesigned casing improves grip and durability, while the exposed temperature sensor ensures rapid equilibration for ±2% full-scale accuracy.
Built for Reliable Field and Lab Testing
Graphite Sensor Technology
Non-oxidizing graphite electrodes provide consistent, repeatable readings over time without sensor degradation
Automatic Temperature Compensation
Exposed temperature sensor compensates for water temp from 0 to 50°C with fast response time
Simple Manual Calibration
One-point calibration with HI 70031 solution using side trimmer adjustment for field recalibration
Air Bubble Escape Design
Engineered casing allows trapped air to escape from sensor area for more accurate readings
Extended Battery Life
Four 1.5V batteries provide approximately 200 hours of continuous operation
Compact and Readable
Large LCD display on a pocket-sized unit at 175 x 41 x 23 mm and just 95 grams
Technical Details
| Range | 0 to 1999 µS/cm |
| Resolution | 1 µS/cm |
| Accuracy | ±2% full scale |
| Temperature Compensation | Automatic, 0 to 50°C (32 to 122°F) |
| Calibration | Manual, 1-point with HI 70031 solution |
| Probe | HI 73303 (graphite sensors) |
| Battery | 4 x 1.5V, approx. 200 hours continuous use |
| Operating Environment | 0 to 50°C, RH max 95% |
| Dimensions | 175 x 41 x 23 mm (6.9 x 1.6 x 0.9") |
| Weight | 95 g (3.4 oz) |
Ideal Testing Applications
The Hanna HI98303 DiST3 is designed for testing reverse osmosis permeate, deionized water, distilled water, and low-conductivity aquarium or hydroponic systems. It pairs with Hanna HI 70031 calibration solution and uses the replaceable HI 73303 probe. Perfect for verifying RO system performance, monitoring filter effectiveness, and ensuring water purity in laboratories, industrial facilities, and home filtration systems where conductivity below 2000 µS/cm is expected.
Hanna Instruments has been manufacturing precision water quality meters for over 40 years, trusted by professionals worldwide for accuracy and durability.
HI98303 DiST3 Conductivity EC Tester
Pocket-sized conductivity meter with 1 µS/cm resolution and automatic temperature compensation for reliable water quality monitoring up to 1990 µS/cm
The Hanna HI98303 DiST3 delivers accurate conductivity readings with 1 µS/cm resolution across a range of 0 to 1990 µS/cm, making it ideal for testing RO water, distilled water, and low-conductivity filtration systems. The redesigned casing improves grip and durability, while the exposed temperature sensor ensures rapid equilibration for ±2% full-scale accuracy.
Built for Reliable Field and Lab Testing
Graphite Sensor Technology
Non-oxidizing graphite electrodes provide consistent, repeatable readings over time without sensor degradation
Automatic Temperature Compensation
Exposed temperature sensor compensates for water temp from 0 to 50°C with fast response time
Simple Manual Calibration
One-point calibration with HI 70031 solution using side trimmer adjustment for field recalibration
Air Bubble Escape Design
Engineered casing allows trapped air to escape from sensor area for more accurate readings
Extended Battery Life
Four 1.5V batteries provide approximately 200 hours of continuous operation
Compact and Readable
Large LCD display on a pocket-sized unit at 175 x 41 x 23 mm and just 95 grams
Technical Details
| Range | 0 to 1999 µS/cm |
| Resolution | 1 µS/cm |
| Accuracy | ±2% full scale |
| Temperature Compensation | Automatic, 0 to 50°C (32 to 122°F) |
| Calibration | Manual, 1-point with HI 70031 solution |
| Probe | HI 73303 (graphite sensors) |
| Battery | 4 x 1.5V, approx. 200 hours continuous use |
| Operating Environment | 0 to 50°C, RH max 95% |
| Dimensions | 175 x 41 x 23 mm (6.9 x 1.6 x 0.9") |
| Weight | 95 g (3.4 oz) |
Ideal Testing Applications
The Hanna HI98303 DiST3 is designed for testing reverse osmosis permeate, deionized water, distilled water, and low-conductivity aquarium or hydroponic systems. It pairs with Hanna HI 70031 calibration solution and uses the replaceable HI 73303 probe. Perfect for verifying RO system performance, monitoring filter effectiveness, and ensuring water purity in laboratories, industrial facilities, and home filtration systems where conductivity below 2000 µS/cm is expected.
Hanna Instruments has been manufacturing precision water quality meters for over 40 years, trusted by professionals worldwide for accuracy and durability.
Description
HI98303 DiST3 Conductivity EC Tester
Pocket-sized conductivity meter with 1 µS/cm resolution and automatic temperature compensation for reliable water quality monitoring up to 1990 µS/cm
The Hanna HI98303 DiST3 delivers accurate conductivity readings with 1 µS/cm resolution across a range of 0 to 1990 µS/cm, making it ideal for testing RO water, distilled water, and low-conductivity filtration systems. The redesigned casing improves grip and durability, while the exposed temperature sensor ensures rapid equilibration for ±2% full-scale accuracy.
Built for Reliable Field and Lab Testing
Graphite Sensor Technology
Non-oxidizing graphite electrodes provide consistent, repeatable readings over time without sensor degradation
Automatic Temperature Compensation
Exposed temperature sensor compensates for water temp from 0 to 50°C with fast response time
Simple Manual Calibration
One-point calibration with HI 70031 solution using side trimmer adjustment for field recalibration
Air Bubble Escape Design
Engineered casing allows trapped air to escape from sensor area for more accurate readings
Extended Battery Life
Four 1.5V batteries provide approximately 200 hours of continuous operation
Compact and Readable
Large LCD display on a pocket-sized unit at 175 x 41 x 23 mm and just 95 grams
Technical Details
| Range | 0 to 1999 µS/cm |
| Resolution | 1 µS/cm |
| Accuracy | ±2% full scale |
| Temperature Compensation | Automatic, 0 to 50°C (32 to 122°F) |
| Calibration | Manual, 1-point with HI 70031 solution |
| Probe | HI 73303 (graphite sensors) |
| Battery | 4 x 1.5V, approx. 200 hours continuous use |
| Operating Environment | 0 to 50°C, RH max 95% |
| Dimensions | 175 x 41 x 23 mm (6.9 x 1.6 x 0.9") |
| Weight | 95 g (3.4 oz) |
Ideal Testing Applications
The Hanna HI98303 DiST3 is designed for testing reverse osmosis permeate, deionized water, distilled water, and low-conductivity aquarium or hydroponic systems. It pairs with Hanna HI 70031 calibration solution and uses the replaceable HI 73303 probe. Perfect for verifying RO system performance, monitoring filter effectiveness, and ensuring water purity in laboratories, industrial facilities, and home filtration systems where conductivity below 2000 µS/cm is expected.
Hanna Instruments has been manufacturing precision water quality meters for over 40 years, trusted by professionals worldwide for accuracy and durability.












