- HM Digital TDS-3 TDS Temp Meter
- Two 1.5V button cell batteries (LR44 or equivalent)
- Black vinyl carrying case
Ask Sage about this product
HM Digital TDS-3 TDS Temp Meter with Case
$34.99 USD
- 0 to 9990 ppm Total Dissolved Solids measurement range
- 0 to 80 degrees Celsius temperature measurement range
- Up to 1000 hours of continuous use from button cell batteries
- 1-year manufacturer's warranty covering defects in materials and workmanship
- View More Details
Earn 34 points for shopping and get $0.34 off your next order. Join Harvest Club for free.
Free Shipping On Most Items*
To the lower 48
Transparent Pricing
Backed w/ price match guarantee
Secure Checkout
SSL encrypted payments
Questions? Talk to a specialist.
Mon to Fri, 9am to 5pm PST
- Free Shipping On Most Items*To the lower 48
- Transparent PricingBacked w/ price match guarantee
- 4.8/5 Top Quality Store on Google
- Secure CheckoutSSL encrypted payments
Ask Sage about this product
VOLUME PRICING
Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
- You are checking total dissolved solids because you need to maintain the perfect environment for your plants.
- You are managing water quality because inconsistent readings lead to nutrient imbalances during cultivation.
- The built-in sensor automatically compensates for water temperature so your readings stay consistent.
- The dedicated calibration slot lets you adjust the meter easily with a screwdriver.
- The pen-sized design gives you a professional-grade solution that is easy to carry.
- Growers monitoring their water quality say they finally caught nutrient imbalances early instead of guessing at plant health problems
- Users tracking their water purification systems say they stopped second-guessing their ppm numbers after switching to this meter
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.)
Why Trimleaf
Equipping home growers, craft producers, and commercial operations across North America since 2016.
10+
Years of Specialist Knowledge
4.8★
2010+ Verified Reviews
50,000+
Growers Served
120+
Top Equipment Brands in Stock