Pay in installments of $28.75 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 17 - Aug 22
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
HM Digital™ pH/TDS/EC/Temp Meter Model COM-300The COM 300 is an advanced waterproof combo 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 compensation (ATC) to
The COM-300 is an advanced waterproof combo 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 µS, mS and ppm scales. The meter incorporates automatic temperature compensation (ATC) to accommodate for discrepancies in temperature that would naturally occur and also features digital calibration for easy and precise calibration that will yield better results.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
4.8 ★★★★★
Based on 28 reviews
Sort
Product Reviews
★★★★★ 5
perfect book
Format: Hardcover
awesome book
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 4
pretty good
Format: Hardcover
This book was about the FGTeev family getting shrunk by the glitch when they were on vacation and it is up to Shawn to save them all. I must admit I never watched their videos, and when my friends learned that, they said that I missed out on what would have been a fantastic part of my younger days. The book was pretty good, but I feel like the plot just wasn't as good as some of the previous books' plots. I recommend it to anyone who liked the earlier books.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Son loved it.
Format: Hardcover
Son loved it! Book was nice and really bright! Great quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
The whole series is awesome
Format: Hardcover
Great series, great book. Can't wait for the next.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 5
Good kids book
Format: Hardcover
My son really liked this book. He enjoyed it and read it in one day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026