Dirty Liquid Indicators | McMaster-Carr

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.

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

For the Manufacturer User Manual, click on a part number and select Product Detail.

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

Image of Product. Front orientation. Chemistry Meters. Remote-Reading Multifunction Chemistry Meters , For Testing Total Dissolved Solids (TDS).

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.

	Conductivity		Salinity			Total Dissolved Solids (TDS)
	Range	Accuracy	Range, ppt	Accuracy	Temp. Accuracy	Range	Accuracy	ATC Range, ° F	Enclosure Rating	Certification	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Clean and Dirty Liquids



		0 to 19.99 μS 20 to 199.9 μS 200 to 1,999 μS 2 to 19.99 mS 20 to 199.9 mS	±1% ±1% ±1% ±1% ±1%	0 to 100	±1%	±0.9° F	0 ppm to 0.1 ppm	±1%	32 to 212	IP57	CE Marked	7 1/2"	3 9/16"	1 5/16"	Yes	LCD	1122T12	0000000

Replacement Sensors

For Testing		Each
Conductivity, Salinity, Temperature, Total Dissolved Solids (TDS)	1122T82	0000000

For Testing Oxidation Reduction Potential (ORP), pH, and Temperature

Image of Product. Front orientation. Chemistry Meters. Remote-Reading Multifunction Chemistry Meters , For Testing Oxidation Reduction Potential (ORP).

Oxidation reduction potential (ORP), pH, and temperature meters take three measurements. ORP measures the amount of dissolved oxygen in liquids. It determines how efficiently a liquid breaks down contaminants.

	Oxidation Reduction Potential (ORP)		pH
	Range, mV	Accuracy	Range, pH	Accuracy	Temp. Accuracy	ATC Range, ° F	Enclosure Rating	Certification	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Clean and Dirty Liquids



		-1,000 to 1,000	±0.2%	0 to 14	±0.01 pH	±0.9° F	32 to 212	IP57	CE Marked	7 1/2"	3 9/16"	1 5/16"	Yes	LCD	1122T14	0000000

Replacement Sensors

For Testing		Each
Oxidation Reduction Potential (ORP)	1122T23	0000000
pH	1122T62	000000

Water-Resistant Multifunction Chemistry Meters

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. They meet IP57 for protection from dust and temporary submersion in 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.

For the Manufacturer User Manual, click on a part number and select Product Detail.

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

Conductivity, salinity, and total dissolved solids (TDS) meters come with one sensor that takes all three chemistry measurements. You can also use them in aquaculture solutions, wastewater, and other dirty liquids.

		Conductivity		Salinity		Total Dissolved Solids (TDS)
	Sensor Material	Range	Accuracy	Range, ppm	Accuracy	Range	Accuracy	ATC Range, ° F	Enclosure Rating	Certification	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Clean and Dirty Liquids



		Plastic	0 to 199.9 μS 200 to 1,999 μS 2 to 19.99 mS	±2%	0 to 99.9	±2%	0 to 99.9 ppm 100 to 999 ppm 1 to 9.99 ppt	±2%	32 to 149	IP57	CE Marked	6 3/4"	1 3/8"	1 5/8"	Yes	LCD	13945T52	0000000

Replacement Sensors

For Testing		Each
Conductivity, Salinity, Total Dissolved Solids (TDS)	13945T54	000000

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.

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

	Conductivity		Resistivity		Salinity			Total Dissolved Solids (TDS)
	Range	Accuracy	Range, Mohm	Accuracy	Range, ppt	Accuracy	Temp. Accuracy	Range	Accuracy	ATC Range, ° F	Enclosure Rating	Certification	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Clean and Dirty Liquids



		0 mS to 200 mS	±1.5%	0 to 20	±1.5%	0 to 100	±1.5%	±0.9° F	0 ppt to 100 ppt	±0.1%	32 to 212	IP67	CE Marked	6 5/16"	3 3/16"	1 5/8"	Yes	LCD	14345T44	000000000

Replacement Sensors

For Testing		Each
Conductivity, Resistivity, Salinity, Temperature, Total Dissolved Solids (TDS)	14345T45	0000000

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.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing Conductivity

Image of Product. Front orientation. Chemistry Meters. Bench-Top Conductivity Meters .

		Conductivity
	Sensor Material	Range	Accuracy	ATC Range, ° F	Ht.	Wd.	Dp.	Batteries Included		Each
For Use With Dirty Liquids



		Plastic	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	1128T14	0000000


		Plastic	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	1128T137	000000

Conductivity Meter Cases

		Each
Carrying Case	1128T15	0000000

Bench-Top TDS Meters

Commonly used to test environmental samples, boiler condensate, wastewater, and other dirty liquids for contaminants, this bench-top meter determines the total dissolved solids (TDS) in a solution. It has 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.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing Total Dissolved Solids (TDS)

Image of Product. Front orientation. Chemistry Meters. Bench-Top TDS Meters .

		Total Dissolved Solids (TDS)
	Sensor Material	Range	Accuracy	ATC Range, ° F	Ht.	Wd.	Dp.	Batteries Included		Each
For Use With Dirty Liquids



		Plastic	0 to 50 ppm 0 to 500 ppm 0 to 5,000 ppm	±2%	50 to 160	4"	3 1/2"	4 1/2"	Yes	1128T16	0000000

Conductivity Meter Cases

		Each
Carrying Case	1128T15	0000000

ORP Meters

Measure a solution’s oxidation reduction potential (ORP) to determine its ability to break down contaminants. These meters are commonly used to monitor water quality in pools, spas, and other clean liquids. Use a Calibration Solution (not included) and the calibration adjustment screw to maintain accuracy.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing Oxidation Reduction Potential (ORP)

		Oxidation Reduction Potential (ORP)
	Sensor Material	Range, mV	Accuracy	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Dirty Liquids



		Plastic	-999 to 999	±2 mV	7"	1 1/2"	1 1/2"	Yes	LCD	1196T99	0000000

pH Meters

More precise than test strips, these meters are often used to measure the pH of dirty liquids in agricultural systems, aquaculture tanks, and printing fountains. 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.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing pH

Image of Product. Front orientation. Chemistry Meters. pH Meters .

		pH
	Sensor Material	Range, pH	Accuracy	ATC Range, ° F	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Dirty Liquids



		Glass	0 to 14	±0.1 pH	32 to 122	7"	1 1/2"	1 1/4"	Yes	LCD	1196T35	0000000

Remote-Reading pH Meters

Monitor pH readings from your smartphone or tablet—download the app to view data up to 160 ft. away using Bluetooth. Made of durable nonglass, the sensor resists breaking. They are for use with dirty liquids, so they stand up to petrochemical, environmental, and agricultural testing. Rated IP67, they seal out dust and withstand temporary submersion. Use a calibration solution (not included) and the calibration setting in the app to maintain accuracy.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing pH

Image of Product. Front orientation. Chemistry Meters. Remote-Reading pH Meters .

	Chemistry Meters													Buffer Solutions
		pH
	Sensor Material	Range, pH	Accuracy	ATC Range, ° F	Data Connection	Enclosure Rating	Certification	Ht.	Wd.	Dp.	Batteries Included		Each		Each
For Use With Dirty Liquids



		Plastic	0 to 14	±0.02 pH	32 to 176	Bluetooth	IP67	CE Marked	8 7/8"	1"	7/8"	Yes	1131T51	000000000	21315T398	000000

Replacement Sensors

	Each
1131T52	0000000

Water-Resistant ORP Meters

Since this oxidation reduction potential (ORP) meter has a housing that meets IP67 for complete resistance to dust and protection from temporary submersion, it’s often used to determine a solution’s ability to break down contaminants in harsh field conditions. For use with dirty liquids containing heavy metals, sulfides, and harsh chemicals, this meter is often used for wastewater treatment. 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.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing Oxidation Reduction Potential (ORP)

		Oxidation Reduction Potential (ORP)
	Sensor Material	Range, mV	Accuracy	ATC Range, ° F	Enclosure Rating	Certification	Ht.	Wd.	Dp.	Batteries Included	Display Type		Each
For Use With Dirty Liquids



		Glass	-1,000 to 1,000	±2 mV	32 to 140	IP67	CE Marked	8"	4"	3"	Yes	LCD	13945T18	0000000

Replacement Sensors

	Each
13945T48	0000000

Water-Resistant pH Meters

Check pH in harsh field conditions. These floating meters that have a housing that meets IP67 for complete resistance to dust and protection from temporary submersion. Automatic temperature compensation standardizes readings at 77° F to prevent inaccurate results in fluctuating temperatures. Use a calibration solution and the calibration button to maintain accuracy. They do not include Calibration Solution.

For the Manufacturer User Manual, click on a part number and select Product Detail.

For Testing pH

For Use With Dirty Liquids—Meter for dirty liquids stands up to wastewater, plating bath solutions, and other harsh liquids.

		pH
	Sensor Material	Range, pH	Accuracy	ATC Range, ° F	Enclosure Rating	Certification	Ht.	Batteries Included	Display Type		Each
For Use With Dirty Liquids



		Glass	-2 to 16	±0.01 pH	32 to 122	IP67	CE Marked	7"	Yes	LCD	13945T19	0000000

Replacement Sensors