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Description
AquaMaster E300 Pro Substrate EC/Temperature TesterThe E300 Pro is the ideal tester to measure the EC and temperature of coconut soil and other moist, soft substrates and liquids. The tester features a modern and robust housing with easy to operate buttons. The E300 Pro includes an EC electrode of unprecedented quality. The tester is delivered fully calibrated and includes batteries. How does the tester work? Connect the PIN connector of the electrode to the EC meter Rinse the electrode with running
The E300 Pro is the ideal tester to measure the EC and temperature of coconut soil and other moist, soft substrates and liquids. The tester features a modern and robust housing with easy to operate buttons. The E300 Pro includes an EC electrode of unprecedented quality. The tester is delivered fully calibrated and includes batteries.
How does the tester work?
- Connect the PIN connector of the electrode to the EC meter
- Rinse the electrode with running water and dry it using clean kitchen paper
- Press the on/off button to turn on the tester
- Place the electrode in the (soft) substrate (make sure the substrate is well wet/damp, otherwise the tester will not work properly) or liquid to be measured
- Wait for the value to stabilise. The measurement is now complete
- Press the HOLD button to save the measurement. Do not forget to press the HOLD button again when the tester is used once more
- Rinse the electrode with clean water after use, so that no residue is left on the electrode
- Press the on/off button to turn off the tester
- 1x Digital Substrate EC/Temp tester E300 Pro
- 1x User Manual
- Range: EC: 0.0 ~ 19.9 mS/cm / Temp.: 0°C ~ 50°C (32°F ~ 122°F)
- Resolution: EC: 0.1 mS/cm / Temp.: 0.1 ºC (1.0 ºF)
- Accuracy: EC: ± 2% F.S. (0.0 ~ 4 mS/cm) / Temp.: ±0.5°C (32°F) / Temp. compensation: 0°C - 50°C (32°F - 122°F)
- Calibration: EC: 1 point auto 1.4 EC
- Features: Battery indicator & automatic temp. compensation
- Power supply: 3 × 1.5 Volt AG-13 button cell battery (included)
- Auto. power-off: After 8 minutes
- Calibration indicator: With correct calibration
- Waterproof: IP65 (electrodes are IP67 waterproof)
- Dimensions: 8.66" x 1.57" x 1.57"
- Weight: 0.37 lbs
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
4.2 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Great buy
Size: 12 Wide, Color: Black Faux Leather
I absolutely love these Amazon Essentials Belice Ballet Flats! They are so comfortable right out of the box and fit my feet perfectly. I can wear them all day without my feet hurting, which is hard to find with flats sometimes. They’re also really cute and go with almost everything I wear. I find myself reaching for them all the time because they’re both comfy and pretty. Definitely a great everyday shoe, especially for the price!
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Loooove these shoes!
Size: 7.5 Wide, Color: Chestnut Brown Faux Leather
I have these in several colors, and they’ve become a true staple in my wardrobe.
The Amazon Essentials Women's Belice Comfortable Slip-On Ballet Flats are exactly what I look for in an everyday shoe—simple, versatile, and comfortable right out of the box. The slip-on design makes them super convenient for busy days, and they pair effortlessly with everything from jeans to dresses to work outfits.
They’re lightweight but still feel supportive enough for all-day wear, and I appreciate that they don’t require a break-in period. The fit is generally true to size, and the variety of colors makes it easy to stock up and rotate depending on the outfit.
Overall, these are reliable, easy-to-wear flats that offer great value for the price. Not flashy, just consistently comfortable and practical—which is exactly why I keep coming back to them.
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Reviewed in the United States on June 5, 2026
★★★★★ 5
Has the look that they should cost more.
Size: 11.5 Wide, Color: Dark Turquoise
Comfortable and the fit is very comfortable. Looks great and extremely comfortable. Soft and light weight. Easy to put on. Sizing was perfect and the wide width is truly a wide. I’m coming back for more colors.
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Reviewed in the United States on June 1, 2026
★★★★★ 4
Good at price
Size: 9 Wide, Color: Sand
Fit a little small at my big toe but otherwise fit well. Heel rubbed slightly first 5 hour wear but no blister.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Lightweight comfortable at a good price!
Size: 10.5, Color: Navy
These shoes are perfect. The color matches my navy outfits as well as my denim. They are comfortable and they look great. They are easy to pack lightweight and a great value.
I am extremely satisfied and highly recommend!
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Reviewed in the United States on June 3, 2026