- HM Digital TDS-3 TDS Temp Meter
- Two 1.5V button cell batteries (LR44 or equivalent)
- Black vinyl carrying case
HM Digital TDS-3 TDS Temp Meter with Case
$34.99 USD
- Measures TDS from 0 to 9990 ppm with 2% accuracy
- The built-in ATC sensor adjusts for water temperature so you get an accurate reading without manual math
- Compact pen-style design fits into any pocket or tool kit for quick spot checks
- 1-year warranty covering defects in materials and workmanship
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Who This Is For
- You are monitoring TDS levels because fluctuating nutrient concentrations are causing visible stress in your crop.
- You are upgrading to a digital meter because manual reagent tests are too slow for your daily reservoir checks.
What We Found
- We noticed the manual calibration screw is more reliable than digital buttons that can fail after a few splashes.
- The vinyl case is not just for show, it actually keeps the sensor from getting banged around in a tool bag.
What Users Say
- Users who switched to this pen say they stopped double-checking every reading with expensive benchtop equipment.
- Growers tell us the battery life is a relief since they go a full year without hunting for replacements.
HM Digital TDS-3 TDS Temp Meter with Case
Monitoring water quality is essential for successful cultivation, yet many growers struggle with inconsistent readings that lead to nutrient imbalances. The **HM Digital TDS-3 TDS Temp Meter** provides a professional-grade solution in a portable, pen-sized design. By accurately measuring Total Dissolved Solids (TDS) and temperature, this meter allows you to maintain the perfect environment for your plants, ensuring they receive exactly what they need for vigorous growth.
Built for reliability and ease of use, the TDS-3 is a staple for water purification, hydroponics, and home gardening. For growers who need to monitor more than just TDS, this device pairs perfectly with other HM Digital tools. If your setup requires multi-parameter testing, consider the HM Digital Pro COM-300 pH TDS EC Temp Meter or the HM Digital Hydromaster HM200 Portable - pH TDS EC Temp Meter for comprehensive nutrient management.
This durable meter features Automatic Temperature Compensation (ATC) to ensure accuracy regardless of water temperature. With its long-lasting battery life and included carrying case, the TDS-3 is designed to be the most dependable tool in your grow room for years to come.
What's Included
Features
📊
Simultaneous Readings
Measures TDS and temperature levels at once for complete water quality analysis in one view.
🛠️
Digital Calibration
Easily calibrate via a dedicated slot with a screwdriver to ensure consistent and professional accuracy.
📺
Large LCD
Features a high-contrast display for easy reading of measurements, even in low-light grow environments.
🔋
Battery-operated
Powered by button cell batteries with up to 1000 hours of continuous use for long-lasting reliability.
Specifications
| Specification | Value |
|---|---|
| TDS Range | 0 – 9990 ppm (mg/L) |
| Temp. Range | 0 – 80 degrees Celsius |
| Resolution | 0-999: 1 ppm; 1000-9990: 10 ppm |
| Accuracy | +/- 2% |
| ATC | Built-in sensor for Automatic Temperature Compensation (1-50°C) |
| Power Source | 2 x 1.5V button cell batteries (included) |
| Battery Life | 1000 hours of usage |
| Dimensions | 15.5 x 3.1 x 2.3 cm (6.1 x 1.25 x 1 in) |
Warranty
The HM Digital TDS-3 is backed by a manufacturer's warranty covering defects in materials and workmanship for a period of one year from the date of purchase.
FAQs
How do I calibrate the TDS-3 meter?
The TDS-3 is factory calibrated but can be manually adjusted. Use a 342 ppm NaCl solution and a small screwdriver to turn the calibration trimmer located in the hole on the back of the meter until the display matches the solution value.
Does this meter measure Electrical Conductivity (EC)?
While the TDS-3 displays readings in ppm (Total Dissolved Solids), it calculates this value based on the electrical conductivity of the water. For direct EC readings, we recommend the HM Digital COM-80.
Is the TDS-3 waterproof?
The TDS-3 is water-resistant, meaning it can handle splashes, but it should not be fully submerged in liquid beyond the maximum immersion level.
What does the 'x10' icon on the screen mean?
When the TDS reading exceeds 999 ppm, a 'x10' icon will appear on the LCD. Multiply the displayed number by 10 to get the actual ppm value.
How often should I change the batteries?
With a battery life of approximately 1000 hours, most users will only need to replace the two LR44 batteries once every year or two, depending on frequency of use.
Happy To Help
Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
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