Display Type: Digital, Model Number: EZ-9909A, Display: Support backlight, TDS measurement range: 0-1000ppm, Waterproof rating: IP67, Display size: 33*24mm, Weight: 170g, Measuring range of table salinity: 0.00-25.00%, Accuracy: 0.01-5.00% (±0.1%), Battery: 3x 1.5V LR44 Button Battery (not includes), EC measuring range: 0-10000US/cm, Size and weight: 183*37*37mm(7.2*1.5*1.5in)/90g(3.2oz), 5 in 1 function: TDS/EC/PH/Salinity/Temperature Tester, The measurement range of sea water salinity: 10.1-200.0ppt., PH measurement range: 0.01-14.00pH, 5.01-25.00% (±1%).
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Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. As you can see I didn’t find any active coupon for this product right now… I don’t want to misguide you about the price. I don’t know if it’s good, because I don’t have enough records in my database…
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGBG77169, BG8ca8b3, BGherra, BGGines
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – EZ-9909A 5 in 1 TDS/EC/PH/Salinity/Temperature Meter ($-3)
Price history and price alert
Not enough data to show price history chart… $33.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).