What the GroLine EC TDS Tester Does at the Reservoir
Two buttons, and one of them is power. Drop the probe in a sachet of Quick Cal and the meter recognises the standard on its own at 5.00 mS/cm. Standard mode calibrates at 1.41 mS/cm instead. Readings are temperature compensated from an exposed sensor, so a cold tank does not read low. The screen carries the reading and the temperature together, with stability and calibration indicators beside them.
Reading an EC Meter for Hydroponics Without Drift
The sensors are graphite rather than steel, which cuts the polarisation that pushes a basic pen off over a season. Range covers 0.00 to 6.00 mS/cm at 0.01 resolution, to ±2% of full scale. TDS follows the factor you pick: 0 to 3000 ppm on 0.5, or up to 3999 ppm on 0.7. Temperature reads 0 to 50 C, 32 to 122 F, to ±0.5 C. The body is waterproof and only 0.7 in thick, at 160 x 40 x 17 mm and 68 g. A CR2032 cell runs it about 250 hours, and auto-off can be set to 8 minutes, 60 minutes or switched off. This listing includes the rugged case and four Quick Cal sachets, plus the protective cap, battery, manual and quality certificate.
Key Features
- Graphite sensors: They cut the polarisation that walks a basic conductivity pen off over a season.
- Quick Cal, one button: The meter recognises 5.00 mS/cm, or 1.41 mS/cm in standard calibration mode.
- 0.00 to 6.00 mS/cm: 0.01 resolution to ±2% of full scale, with automatic temperature compensation.
- 0.5 and 0.7 TDS factors: 3000 ppm on 0.5, up to 3999 ppm on 0.7, so it matches your usual scale.
- Waterproof and 0.7 in thick: 160 x 40 x 17 mm at 68 g, with the temperature sensor exposed for speed.
- About 250 hours on a CR2032: Auto-off at 8 or 60 minutes, or disabled. Case and four sachets included.
Technical Specifications
| Specification | Value |
|---|---|
| Model | GroLine HI98318 |
| Part Number | HI98318 |
| EC Range | 0.00 to 6.00 mS/cm |
| EC Resolution | 0.01 mS/cm |
| EC Accuracy | ±2% of full scale |
| TDS Range, 0.5 CF | 0 to 3000 ppm |
| TDS Range, 0.7 CF | 0 to 3999 ppm |
| TDS Resolution | 10 ppm |
| TDS Accuracy | ±2% of full scale |
| Temperature Range | 0.0 to 50.0 C, 32.0 to 122.0 F |
| Temperature Resolution | 0.1 C, 0.1 F |
| Temperature Accuracy | ±0.5 C, ±1 F |
| Temperature Compensation | Automatic, 0 to 50 C |
| Conversion Factors | 0.5 (500 ppm) and 0.7 (700 ppm) |
| Calibration | Automatic single point, Quick Cal 5.00 mS/cm or 1.41 mS/cm |
| Sensor | Graphite |
| Battery | CR2032 Li-Ion 3V x 1 |
| Battery Life | About 250 hours continuous |
| Auto-Off | 8 minutes, 60 minutes or disabled |
| Dimensions | 160 x 40 x 17 mm, 6.3 x 1.6 x 0.7 in |
| Weight | 68 g, 2.4 oz |
| Supplied With | Rugged case, 4 Quick Cal sachets, cap, battery, manual, certificate |
| Warranty | 1 year |