Zigbee wireless long-distance data transmission. Device must be used with a gateway.
eBay
GA BNC Type Ph Meter Sonde 12mm Diameter 50 Ohm Connector Probe For Hydroponics Aquarium Pool With 200cm Cable Water Tester
Aliexpress UK
Range: ph 0.00-14.00ph. Accuracy :ph ±0.1ph. Resolution : ph 0.01ph. Battery :DC6V ( with power adaptor) not included.
eBay
HT‑1202 High Precision Digital Water Quality Tester PH MV Tester Temperature Meter 0~14PH
Aliexpress UK
Specifications: * Material: ABS Plastic * Measuring range 0.00~14. 00PH * Resolving power 0.01PH * Accuracy 0.05PH (@25°C) * Working voltage 2x1.5V (AG-13 button battery) * Work environment 0~60°C RH < 95% * Correcting 2-point or 3-point automatic correction * Volume: 155x31x18(mm)
eBay
Ph Meter 0-14 Tester Pen for Hydroponics 0.01 High Precision Pocket Size for Home Drinking Water and Swimming Pool
Aliexpress UK
This water quality tester is designed to test pH and chlorine level for swimming pool and spa. It is easy to operate, no more chemicals need. Large screen quickly shows the test result with high precision.
eBay
Smart WIFI Online Meter PH ORP Temp Aquarium Water Quality Tester Monitor Controller for Swimming Pool Spa Soilless Cultivation
Aliexpress UK
TDS: 0-99999ppm. Sensitive probe purity instantly visible, press the switch, the test pen into the water to be tested, the lower the TDS value, indicating that the lower the content of total dissolved solids in the water, the purer the water quality.
eBay
7 in 1 Temp ORP EC TDS Salinity S.G PH Meter Online Blue Tooth Water Quality Tester APP Control for Drinking Laboratory Aquarium
Aliexpress UK
PH Range: 3.5-8 Ph (3.5-6.5 ACID, 7 NOR, 7-8 ALKALI). - PH Range: 3.5-8PH ( 3.5-7 Acid, 7-8 Alkaline). Step 5: Remove probe from soil and wipe clean after each use. Step 3: Adjust the position of the probe until the pointer on the dial swing slightly.
eBay
5 In 1 Digital PH TDS EC Meter Salinity Temperature Tester Conductivity Water Filter Purity Pen with Backlight
Aliexpress UK
Take a test before drinkingThe TDS value represents the total soluble solid content in water which can reflect water quality to a certain extent. From detecting total soluble solids to ensuring the right pH levels for fish life, it's a versatile tool that brings peace of mind.
eBay
5 In 1 Digital PH TDS EC Meter Pen Salinity Temperature Tester Conductivity Filter Purity with Backlight for Aquarium Water
Aliexpress UK
Suitable for household drinking water, hydroponics, lab, aquarium. It can be used as a classic tester even if it is not connected to a smartphone. TDS: 0-19900ppm, 0-199.0ppt. EC、TDS、CF: ±2% F.S. TDS: 1ppm (＜1999ppm), 10ppm (＞1999ppm), 0.1ppt.
eBay
Professional 2 In 1 PH TDS Meter Tester Water Quality Monitor Online Acidity Monitor Analyzers Tester for Aquarium
Aliexpress UK