Salinometers | McMaster-Carr

	For Testing For Testing

Conductivity

Total Dissolved Solids (TDS)

Salinity

Temperature

Resistivity

	For Use With For Use With

Clean Liquids

Dirty Liquids

Liquids

	Meter Type Meter Type

Direct Reading

Remote Reading

	Maximum Conductivity Maximum Conductivity

	Minimum Conductivity Minimum Conductivity

	Maximum Total Dissolved Solids (TDS) Maximum Total Dissolved Solids (TDS)

	Range Type Range Type

Multi

Single

	Conductivity Resolution Conductivity Resolution

0.01

0.05

0.1

	Minimum Automatic Temperature Compensation (ATC) Minimum Automatic Temperature Compensation (ATC)

-4° F

32° F

50° F

	Minimum Total Dissolved Solids (TDS) Minimum Total Dissolved Solids (TDS)

	Sensor Material Sensor Material

Nonglass

Stainless Steel

PEEK Plastic

	Conductivity Accuracy Conductivity Accuracy

±2%

±1.5%

±1%

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Height Height

	Depth Depth

	Width Width

	Maximum Automatic Temperature Compensation (ATC) Maximum Automatic Temperature Compensation (ATC)

	Environment Environment

High-Pressure Washdown

Sanitary

	Calibration Method Calibration Method

Button

Knob

	Specifications Met Specifications Met

CE Marked

3-A Sanitary Certified

EHEDG Certified

FDA Compliant

	Environmental Rating Environmental Rating

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

Forward

How can we improve?

15 Products

Water-Resistant Multifunction Chemistry Meters

For Use with
Clean
Liquids

For Use
with Clean
and Dirty Liquids

Test different water-chemistry measurements in dirty, wet conditions. Often used in pools and spas, all of these meters are for use with clean liquids. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a calibration solution (not included) and the calibration button to maintain accuracy.

IP57 meters are protected from dust and temporary submersion in liquids.

IP65 meters are protected from dust and low-pressure jets of liquids.

Conductivity, salinity, and total dissolved solids (TDS) meters come with one sensor that takes all three chemistry measurements.

Conductivity and total dissolved solids (TDS) meters come with one sensor that takes both chemistry measurements. You can also use them in aquaculture solutions, wastewater, and other dirty liquids. They cannot be sold to Canada due to import regulations.

For Testing Conductivity, Salinity, and Total Dissolved Solids (TDS)

Meters							Replacement Sensors
Sensor Material	Automatic Temperature Compensation (ATC) Range, °F	Environmental Rating	Specifications Met	Batteries Included		Each		Each
For Use With Clean Liquids
Nonglass	32° to 149°	IP57	CE Marked	Yes	00000000	0000000	00000000	000000

For Testing Conductivity and Total Dissolved Solids (TDS)

For Use With Clean and Dirty Liquids
Sensor Material	Automatic Temperature Compensation (ATC) Range, °F	Environmental Rating	Specifications Met	Batteries Included	Cannot Be Sold To		Each
Nonglass	32° to 122°	IP65	CE Marked	Yes	Canada	0000000	000000

Remote-Reading Multifunction Chemistry Meters

Take multiple water-chemistry and temperature measurements in hard-to-reach places from up to 3 feet away. Often used in tap water and wastewater, these meters work in both clean and dirty liquids. Automatic temperature compensation standardizes readings to 77° F to prevent inaccurate results in changing temperatures. The data hold function freezes the current reading on the display. For easy viewing, temperature and chemistry measurements appear on the same screen. These meters are IP57 rated, so they resist dust and withstand temporary submersion. They cannot be sold to Canada due to import regulations.

To maintain their accuracy, all have a calibration button and some also come with calibration solutions.

Conductivity, salinity, temperature, and total dissolved solids (TDS) meters take four measurements at once. Conductivity measures the concentration of salts, nutrients, chemicals, and other substances. Salinity measures the amount of dissolved salts. TDS determines the contaminant levels. The stainless steel sensor is durable and resists breaking.

For Testing Conductivity, Salinity, Temperature, and Total Dissolved Solids (TDS)

For Testing Conductivity, Salinity, Temperature, and Total Dissolved Solids (TDS)

Conductivity		Salinity			Total Dissolved Solids (TDS)
Range	Accuracy	Range	Accuracy	Temp. Accuracy	Range	Accuracy	Automatic Temperature Compensation (ATC) Range, °F	Batteries Included	Cannot Be Sold To		Each
For Use With Clean and Dirty Liquids
0 to 19.99 mS 2 to 19.99 mS 20 to 199.9 mS 20 to 199.9 µS 200 to 1,999 µS	±1% ±1% ±1% ±1% ±1%	0 to 100 ppt	±1%	±0.9° F	0 to 0.1 ppm	±1%	32° to 212°	Yes	Canada	0000000	0000000

Replacement Sensors

For Testing		Each
Conductivity, Salinity, Temperature, Total Dissolved Solids (TDS)	0000000	0000000

Remote-Reading Multifunction Chemistry Meters with PC Output

Test temperature, chemical concentration, contamination, and salt levels in liquid from up to 6 ft. away, then send the results to your computer for analysis. These meters include a USB cable that transfers up to 1,000 readings. Often used to test water quality, they work on both clean and dirty liquids—from tap water to wastewater. Conductivity tests measure the concentration of salts, nutrients, chemicals, and other substances. Total dissolved solids (TDS) tests report contaminant levels. Salinity tests determine the salt levels in liquid. The sensor is made of stainless steel, so it’s durable and resists breaking. IP67 rated, these meters are dust tight and withstand temporary submersion.

To prevent inaccurate results from changing temperatures, these meters automatically standardize temperature readings at 77° F. Temperature readings appear on screen with other measurements, so you won’t have to scroll through multiple screens. A data hold function freezes the current reading on the display.

To maintain accuracy of the meters, they come with calibration solutions and have a calibration button.

These meters cannot be sold to Canada due to import regulations.

For Testing Conductivity, Resistivity, Salinity, Temperature, and Total Dissolved Solids (TDS)

Meter

Conductivity		Resistivity		Salinity			Total Dissolved Solids (TDS)
Range	Accuracy	Range	Accuracy	Range	Accuracy	Temp. Accuracy	Range	Accuracy	Automatic Temperature Compensation (ATC) Range, °F	Batteries Included	Cannot Be Sold To		Each
For Use With Clean and Dirty Liquids
0 to 200 mS	±1.5%	0 to 20 megohms	±1.5%	0 to 100 ppt	±1.5%	±0.9° F	0 to 100 ppt	±0.1%	32° to 212°	Yes	Canada	00000000	0000000

Replacement Sensors

Replacement Sensor

For Testing		Each
Conductivity, Resistivity, Salinity, Temperature, Total Dissolved Solids (TDS)	00000000	0000000

Water-Resistant Conductivity Meters

Don’t worry about dropping this meter in your tank when checking electrical conductivity—it floats and has a housing that meets IP67 for complete resistance to dust and protection from temporary submersion. For use with water, hydroponic solutions, and other clean liquids, this meter measures a liquid's conductivity to indicate the concentration of salts, nutrients, chemicals, and other substances. It displays temperature in addition to conductivity. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a Calibration Solution (not included) and the calibration button to maintain accuracy.

Meters
	Conductivity								Replacement Sensors
Sensor Material	Range	Accuracy	Automatic Temperature Compensation (ATC) Range, °F	Environmental Rating	Specifications Met	Batteries Included		Each		Each
For Use With Clean Liquids
304 Stainless Steel	0 to 1,999 µS	±1.5%	32° to 122°	IP67	CE Marked	Yes	00000000	0000000	00000000	000000

Bench-Top Conductivity Meters

Pour contaminated water, wastewater, printing fountain solutions, and other dirty liquids into the meter cup to test electrical conductivity levels that indicate the concentration of salts, nutrients, chemicals, and other substances. These meters have automatic temperature compensation that standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a Calibration Solution (not included) and the calibration knob to maintain accuracy.

	Conductivity
Sensor Material	Range	Accuracy	Automatic Temperature Compensation (ATC) Range, °F	Ht.	Wd.	Dp.	Batteries Included		Each
For Use With Dirty Liquids
Nonglass	0 to 0.5 µS 0 to 5 µS 0 to 50 µS 0 to 500 µS 0 to 5,000 µS	±2%	32° to 120°	4"	3 1/2"	4 1/2"	Yes	0000000	0000000
Nonglass	0 to 10 µS 0 to 100 µS 0 to 1,000 µS 0 to 10,000 µS	±2%	50° to 160°	4"	3 1/2"	4 1/2"	Yes	00000000	000000

Optional Carrying Case

0000000

Each

0000000

Sanitary Conductivity Sensors

Sensor

Three-Color Display

Optional Quick-Clamp Adapter

Often used to save rinse water in beverage and pharmaceutical lines, these sensors test the amount of chemicals, cleaners, and other substances in liquids by measuring how well the liquid conducts electricity. They’re 3-A and European Hygienic Engineering and Design Group (EHEDG) certified, thanks to their design that’s easy to keep clean. Highly polished, they limit where bacteria could grow. They also withstand washdowns with hot water, chemicals, and cleaners common to sanitary lines because of their PEEK probe, stainless steel body, and IP ratings. Their IP ratings also mean they’re dust tight and won’t fail if briefly under water. All are FDA compliant to safely touch food.

These sensors work with 4-20 mA analog output to connect to remote displays and programmable logic controllers (PLCs), making them good for hard-to-reach areas and frequent application changes. This also means they’ll set off alarms and trigger cycles to start and stop in automated systems. With the touchscreen, program each color of the display to alert you to errors, completed cycles, and other events. Both the head and the display rotate to view readings from the best angle.

Highly accurate, these sensors test almost any liquid. They also measure temperature—no need for a separate sensor. To compare readings as temperature changes, they automatically standardize readings at 77° F. All meet European safety standards, since they’re CE marked.

Use quick-clamp adapters to connect these sensors to quick-clamp sanitary tube fittings.

For technical drawings and 3-D models, click on a part number.

	Sensor			Conductivity
Lg., mm	Material	Dia., mm	Lg., mm	Range	Accuracy	Electrical Connection Type	Thread Type	Automatic Temp. Compensation (ATC) Range, °F	Environmental Rating	Specifications Met		Each
For Use With Liquids
37	PEEK Plastic	3.6	26	0 to 1,000 mS 0 to 500 mS 0 to 500 µS	±1.5% ±1% ±1.5%	Threaded M12 Plug (Two 4-Pole Connections)	BSPP	-4° to 302°	IP67, IP69K	3-A Certified 74-07, CE Marked, EHEDG Certified, FDA Compliant 21 CFR 177.2415	0000000	000000000
60	PEEK Plastic	3.6	26	0 to 1,000 mS 0 to 500 mS 0 to 500 µS	±1.5% ±1% ±1.5%	Threaded M12 Plug (Two 4-Pole Connections)	BSPP	-4° to 302°	IP67, IP69K	3-A Certified 74-07, CE Marked, EHEDG Certified, FDA Compliant 21 CFR 177.2415	0000000	00000000

Optional Quick-Clamp Adapter

0000000

Each

0000000