Multiparameter Meters

TDS Water Tester, 4 in 1 TDS Meter Digital Water Tester, Accurate and Reliable Digital TDS EC & Temp(°C,°F) Meter, 0-9990PPM Water Quality Tester for Drinking Water RO/DI System Aquarium White 6.1In

$12.99

$ 5 .99 $5.99

5.0

Replacement HM Digital SP-C1 TDS Sensor for COM-100 Meter

$21.99

$ 8 .99 $8.99

4.9

Tuya WiFi 7in1 Water Quality Tester Multi-Parameter Water Analyzer Digital Display PH/ORP/EC/PPM/CF/Humidity/Temperature Monitoring Meter for Drinking Water Aquarium Aquaculture Swimming Pool

$90.00

$ 41 .99 $41.99

4.9

Hydrogen Tester pH Meter for Drinking Water 4 in 1-pH/H2/ORP/TEMP Meter, Hydrogen Water Tester Kit for Hydrogen Water Bottle, pH and ORP Meter for Drinking Water Hydroponics Pool

$24.99

$ 11 .99 $11.99

4.4

4 in 1 TDS Meter Digital Water Tester,Portable Water Quality Tester with EC Temp Color Display,Accurate 0-9999 PPM Meter,Digital TDS Water Quality Tester for Drinking Water,Tap,Aquarium,Swimming Pool

$6.18

$ 2 .99 $2.99

4.6

Hach HQ440D HQ440d Benchtop Dual Input, Multi-Parameter Meter - pH, Conductivity, Optical Dissolved Oxygen, ORP, and ISE

$2,790.00

$ 99 .00 $99.00

4.9

in-Line TDS Meter, TDS Digital Water Tester and PPM Measurement Meter for RO-RODI System Drinking Water Monitor, Aquariums, Hydroponics, 0-9990 ppm Measuring Range (Model A)

$25.99

$ 11 .99 $11.99

4.7

TDS Water Tester, 4 in 1 TDS Meter Digital Water Tester, Accurate and Reliable Digital TDS EC & Temp(°C,°F) Meter, 0-9990PPM Water Quality Tester for Drinking Water RO/DI System Aquarium Yellow 7.1In

$6.99

$ 2 .99 $2.99

4.8

Clean Room Monitor 3 in 1 (Diff. Pressure, Temp, RH) for Pharma Clean Rooms, Isolation Rooms, Hospitals Model: AI-CRM1-1

$305.00

$ 99 .00 $99.00

4.7

2025 TDS Meter Digital Water Tester—— Digital Water Tester for PPM, EC, Temp | Color Display | Portable for Drinking, Tap, Well Water, Pool, Hydroponics, Aquarium

$7.99

$ 2 .99 $2.99

4.8

TDS Water Tester, 4 in 1 TDS Meter Digital Water Tester, Accurate and Reliable Digital TDS EC & Temp(°C,°F) Meter, 0-9990PPM Water Quality Tester for Drinking Water RO/DI System Aquarium White 7.1In

$7.99

$ 3 .99 $3.99

4.7

4 in 1 TDS Meter Digital Water Tester, 2025 New Water Quality Tester with EC Temp Color Display for Drinking Water Aquariums Hydroponics Pools (White)

$8.99

$ 3 .99 $3.99

4.5

Replacement for Rola-Chem 550135 pH Probe

$219.95

$ 97 .99 $97.99

4.5

pH EC PPM Continuous Monitor for Hydroponic Gardening TDS pH Meter for Home Growers Continuously Monitor EC PPM CF ORP Temp Humidity for Indoor Hydroponic Systems DWC Setup Aeroponic Gardening

$69.99

$ 33 .99 $33.99

5.0

SimPure TDS Meter Digital Water Tester, 4 in 1 TDS EC & Temperature Meter, Water Quality Hardness Testing Kits, High Accuracy PPM Meter for Drinking Water, Hydroponics, Aquarium, Pool, RO System

$12.99

$ 6 .99 $6.99

4.8

YSI 60510-1 1 Meter Cable Assembly for ISE/Temperature

$276.75

$ 99 .00 $99.00

4.4

Hydrogen Water Tester pH ORP Meter for Drinking Water, 4 in 1 pH H2 ORP Meter for Hydrogen Water Bottle/Machine, Digital pH PPM ORP Temp Monitor for Hydroponic, Pool, Aquariums

$27.99

$ 13 .99 $13.99

5.0

4-in-1 TDS/EC/Temp(°C/°F) Meter | 0-9990ppm Digital Water Tester | Accurate for RO/DI, Aquariums, Drinking Water | Instant Read

$9.99

$ 4 .99 $4.99

5.0

4 in 1 Digital Water Quality Tester, 2025 New 4 in 1 TDS Meter Digital Water Tester, 0-9990 PPM Meter, EC & Temperature Meter, Water Tester for Drinking Water and Swimming Pools (1)

$22.99

$ 10 .99 $10.99

4.9

AZ-86031 6 in 1 Water Quality Meter Dissolved Oxygen Tester PH Meter Conductivity Salinity Temperature Meter AZ86031 Multiparameter Meter AZ 86031 pH/COND./Salt/TDS/D.O/Temp. Meter

$389.00

$ 99 .00 $99.00

4.9

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Multiparameter Meters