Best in 7 days
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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Description
HM Digital pH/TDS/EC/Temp Meter COM-300The HM Digital COM 300 is an advanced Waterproof pH TDS EC Temp Meter with superior accuracy. The meter measures four parameters: pH, electrical conductivity (EC), total dissolved solids (TDS) and temperature. Features include: 2 different conductivity conversion factors to convert EC to TDS using the 0. 5 (NaCl) or 0. 7 (442TM), as well as selectable modes for measurements in the S, mS and ppm scales. The meter incorporates automatic temperature
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
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 2436 reviews
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Product Reviews
★★★★★ 5
Good
Style: Dress, Color: Gold Tone Stainless Steel
the nicest watch I've used recently
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Reviewed in the United States on April 5, 2026
★★★★★ 4
As described..handsome watch
Style: Dress, Color: Two-Tone Gold/ Blue Dial
Christmas gifts my sons will remember..beautiful watch.
Easy to adjust the bracelet if you buy the kit..
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Reviewed in the United States on February 9, 2025
★★★★★ 5
Great affords
Style: Dress, Color: Two-Tone Gold/ Blue Dial
Absolute great watch. It’s perfect for an every day and situation from work to date night. I had to take out 4 links and now it fits perfectly!
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Reviewed in the United States on July 5, 2025
★★★★★ 5
Ideal para obsequio
Color: Leather - Brown
El color es perfecto, un tono camel que combina con todo, tiene un clip para que se pueda asegurar en el bolsillo.
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Reviewed in the United States on January 13, 2026
★★★★★ 4
Quality product for fair price
Color: Leather - Brown
Good quality, light, material felt good. Quite a few card slots. The magnet is not super strong so you can’t carry a lot of cash, but it is good enough to make it feel secure.
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Reviewed in the United States on August 14, 2025
