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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22
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Description
Alfred Digital EC / TDS / Temperature Hydro TesterThe TDS 1 is an economically priced, reliable EC TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Measures electrical conductivity (EC), total dissolved solids (TDS). Excellent for hydroponic nutrient testing. Features Four scales: EC: S, mS; TDS: ppm, ppt Automatic Temperature Compensation (ATC) Water resistant Measurement Range: 0 9990 S;
The TDS-1 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Measures electrical conductivity (EC), total dissolved solids (TDS). Excellent for hydroponic nutrient testing.Features
- Four scales: EC: µS, mS; TDS: ppm, ppt
- Automatic Temperature Compensation (ATC)
- Water resistant
- Measurement Range: 0-9990 µS; 0-5000 ppm; 0-9.9 mS; 0-5.0 ppt
- Digital Calibration (push button) to any point within the meter's range
- Auto-off function, data-hold function and low-battery indicator
- Display: large and easy-to-read LCD screen includes simultaneous temperature reading
- Factory Calibrated: The TDS-1 meter is calibrated with a 1413 µS solution—can be recalibrated with digital calibration using the push buttons
- Includes a protective cap and batteries
- EC Range: 0-9990 µS; 0-9.9 mS
- TDS Range: 0-5000 ppm (mg/L); 0-5.0 ppt
- Temperature Range: 1-80°C/33-176°F
- Resolution: 1 µS/ppm; 0.1 mS/ppt Temp. resolution: 0.1°C/F
- Accuracy: +/- 2%
- EC-to-TDS Conversion Factor: NaCl (avg of 0.5)
- Calibration: Digital calibration by push button
- Probe: Fixed
- Housing: Water resistant
- Power source: 3 x 1.5V button cell batteries (included) (model LR44 or equivalent)
- 1 Year warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
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Product Reviews
★★★★★ 4
Sunscreen is great, I would t recommend the chapstick
Style: Original
Sun Bum is hands down the best sunscreen I’ve ever used. It smells incredible, like a tropical vacation with that perfect coconut scent. It goes on smoothly, doesn’t leave you feeling sticky or greasy, and actually works! As long as I reapply every few hours, I don’t get burned, which is more than I can say for most other sunscreens I’ve tried.
The face stick is good, goes on easily, but is a little greasy feeling.
I do not like the chapstick, I can’t keep the taste of it out of my mouth and I feel like you have to put it on again and again.
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Reviewed in the United States on July 15, 2025
★★★★★ 5
Perfect!
Style: Original
Perfect for that carry on to a sunny place!!
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Great Mineral Facial Sunscreen
Size: 1.7 Fl Oz (Pack of 1)
This is the best mineral facial sunscreen I’ve used. It comes out as a thin lotion that spreads easily. I have used two other brands and considered a brand that was expensive before trying this. I liked baby bum mineral 50 sunscreen lotion for the body and decided to give this a try. I like sun bum products. They tend to make effective products that are not too expensive. The zinc oxide mineral facial sunscreen I was using slightly irritated my skin and felt heavy like a mask after applying. It left a greasy residue on my face. This sun bum facial mineral sunscreen is non-irritating and feels very light like a chemical-based facial sunscreen. It leaves no residue on the skin. I prefer zinc oxide mineral sunscreen because it’s natural, safe and effective. Some zinc oxide mineral sunscreens put a white caste on the skin after application. The titanium dioxide and zinc oxide blended mineral sunscreens are worse due to the titanium dioxide. Titanium dioxide is a bright-white powdered substance, and I have not experienced any product with this ingredient that doesn’t appear white on the skin and cannot be blended. This sun bum zinc oxide mineral facial sunscreen has no white caste. Like another reviewer, I also hope that sun bum continues to make this facial mineral sunscreen indefinitely. It’s the best I’ve ever tried and at an excellent price point. If you like mineral sunscreens due to the health and environmental concerns with chemical-based sunscreens, try this before trying more expensive mineral facial sunscreens.
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Reviewed in the United States on May 12, 2025
★★★★★ 5
Great product. No white cast
Size: 1.7 Fl Oz (Pack of 1)
This is a great everyday face sunscreen. It doesn’t leave a white cast. It’s not greasy. It leaves a nice dewy finish. Strongly recommend.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Great sheer mineral sunscreen!
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
I’ve never been a mineral sunscreen fan but I really love this one. I needed a mineral sunscreen for days where I knew I was going to be sweating or swimming because the chemical stuff would run into my eyes and burn so bad. This one doesn’t burn my eyes at all.
It doesn’t leave a white cast but it is a little oily and leaves me quite shiny for about 10-15 mins until it fully dries. I don’t really mind because it works well.
I would definitely recommend 👌
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Reviewed in the United States on October 14, 2025