Level Transmitters | McMaster-Carr

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46 Products

Noncontact Liquid-Level Transmitters

Use these transmitters to measure the levels of corrosive, dirty, or sticky liquids without coming into contact with them. They’ll continuously send measurements, so you can monitor status and manage components in your system. Mount at the top of your tank. There should be no tank walls, agitators, or other objects in the path of the transmitter.

Ultrasonic


Transmitter	Button Interface

Ultrasonic transmitters use high-frequency sound waves and are often used to measure water, wastewater, chemicals, and oil but won’t work on vapors, foam, and other media that’s difficult to measure. The included fob allows you to connect your transmitter to your computer, where you'll download software that guides you through the setup process to make sure you get accurate readings.

Digital Switch Output—Transmitters with a switch can also signal your controller to turn components on or off when they reach a set level.

NEMA 6P Enclosure Rating—NEMA 6P rated transmitters protect against dust, weather, washdowns, corrosion, and submersion. IP68 rated transmitters seal out dust and water from temporary submersion.

Button Interface—Ultrasonic transmitters with a button interface can be set up and calibrated without the fob.

				Overall
	Pipe Size	For Liquid Level	Max. Pressure @ Temp.	Dia.	Lg.	Temp. Range, ° F	Cable Lg., ft.	Input Voltage, V DC	Electrical Connection	Enclosure Rating	Includes	Features		Each
NPT Male Pipe Connection







				0-5V DC, 0-10V DC Signal

				1	0 ft. to 4 ft.	30 psi @ 70° F	2"	3 1/4"	-30 to 140	4	12 to 24	Wire Leads	NEMA 6P	USB Configuration Fob	—	3407K23	0000000




						4-20 mA Signal

						2	0 ft. to 19 1/2 ft.	30 psi @ 70° F	4 3/8"	7"	-30 to 140	—	14 to 28	Quick-Disconnect Terminal	IP68, NEMA 6P	USB Configuration Fob	Button Interface	3407K17	000000


						3	0 ft. to 39 ft.	30 psi @ 70° F	4 5/8"	7"	-30 to 140	—	14 to 28	Quick-Disconnect Terminal	IP68, NEMA 6P	USB Configuration Fob	Button Interface	3407K18	00000000




								4-20 mA Signal with Switch

								1	0 ft. to 4 ft.	30 psi @ 70° F	2"	3 1/4"	-30 to 140	4	24	Wire Leads	NEMA 6P	USB Configuration Fob	—	3407K11	000000


								1	0 ft. to 9 3/4 ft.	30 psi @ 70° F	3"	4 3/4"	-30 to 140	4	24	Wire Leads	NEMA 6P	USB Configuration Fob	—	3407K14	000000
								2	1 1/2" to 4 3/4 ft.	30 psi @ 70° F	2 3/4"	4"	-30 to 140	4	14 to 28	Wire Leads	IP68, NEMA 6P	USB Configuration Fob	—	3407K15	000000
								2	4" to 9 3/4 ft.	30 psi @ 70° F	2 3/4"	4"	-30 to 140	4	14 to 28	Wire Leads	IP68, NEMA 6P	USB Configuration Fob	—	3407K16	000000

Replacement USB Adapters for Ultrasonic Transmitters

Electrical Connection	Component		Each
USB-A	USB Adapter	3407K19	000000

Radar

Radar transmitters use high-frequency electromagnetic waves and are best for liquids that are tricky to measure because they work even if there’s condensation, foam, or other difficult conditions. They also measure the level of liquids with solids and small solids. In addition to the traditional 4-20 mA output, these transmitters can also send measurements to your Android smartphone or tablet using Bluetooth. There’s an app you can use to set up your transmitter and calibrate it for your system.

				Overall
	Pipe Size	For Liquid Level, ft.	Max. Pressure @ Temp.	Dia.	Lg.	Temp. Range, ° F	Cable Lg., ft.	Input Voltage, V DC	Electrical Connection	Enclosure Rating	Data Connection	Control Communication Protocol		Each
NPT Male Pipe Connection







				4-20 mA Signal

				1 1/2	0 to 45	40 psi @ 70° F	4"	4 1/4"	-40 to 175	15	18 to 36	Wire Leads	IP68	Bluetooth	HART	5354K21	000000000

Submersible Liquid-Level Transmitters


For Liquids	For Liquids with Solids

Best for measuring liquid levels in applications where traditional mounting is difficult, these transmitters sit at the bottom of your tank. They sense liquid levels by measuring the pressure from the weight of the liquid above them. These transmitters continuously send measurements, so you can monitor the status and manage components in your system. Also known as level loggers, level sensors, and pressure transducers.

For Liquids with Solids—Transmitters for liquids with solids have sink weights that keep the transmitter in place in applications with moving solids or agitated liquids.

				Overall
	For Pressure	Accuracy	Max. Pressure @ Temp.	Dia.	Lg.	Temp. Range, ° F	Cable Lg., ft.	Input Voltage, V DC	For Container Type	Electrical Connection	Enclosure Rating		Each
4 mA to 20 mA Output Signal







				For Liquids

				0 to 5 psi / 0 to 11.5 ft. H₂O	±0.5%	7 psi @ 70° F	1"	5 5/8"	32 to 140	40	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N11	0000000


				0 to 10 psi / 0 to 23 ft. H₂O	±0.5%	15 psi @ 70° F	1"	5 5/8"	32 to 140	40	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N12	000000
				0 to 15 psi / 0 to 34 ft. H₂O	±0.5%	22 psi @ 70° F	1"	5 5/8"	32 to 140	60	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N13	000000
				0 to 20 psi / 0 to 46 ft. H₂O	±0.5%	30 psi @ 70° F	1"	5 5/8"	32 to 140	60	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N14	000000




						For Liquids with Solids

						0 to 5 psi / 0 to 11.5 ft. H₂O	±0.5%	7 psi @ 70° F	3 1/4"	5 1/4"	32 to 140	40	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N15	000000


						0 to 10 psi / 0 to 23 ft. H₂O	±0.5%	15 psi @ 70° F	3 1/4"	5 1/4"	32 to 140	40	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N16	000000
						0 to 15 psi / 0 to 34 ft. H₂O	±0.5%	22 psi @ 70° F	3 1/4"	5 1/4"	32 to 140	60	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N17	000000
						0 to 20 psi / 0 to 46 ft. H₂O	±0.5%	30 psi @ 70° F	3 1/4"	5 1/4"	32 to 140	60	12 to 36	Closed Tank, Open Tank	Wire Leads	IP68	3962N18	000000

Float Liquid-Level Transmitters

Easy to set up and use, these transmitters measure liquid levels using a standard float gauge. They continuously send measurements to a receiving device, such as a programmable logic controller, so you can monitor status and manage components in your system.

		Pipe				Overall
	For Tank Dp.	Size	Type	Gender	Max. Pressure @ Temp.	Dia.	Lg.	Temp. Range, ° F	Cable Lg., ft.	Input Voltage, V DC	For Container Type	Electrical Connection	Certification		Each
4 mA to 20 mA Output Signal







				Polypropylene Float

				19"	1 1/2	NPT	Male	100 psi @ 70° F	1 7/8"	21"	-40 to 220	2	12 to 30	Closed Tank, Open Tank	Wire Leads	C-UL Recognized Component, CE Marked, UL Recognized Component	3966N11	0000000




						316 Stainless Steel Float

						24"	2	NPT	Male	200 psi @ 70° F	2 3/8"	27"	-40 to 220	2	12 to 30	Closed Tank, Open Tank	Wire Leads	C-UL Recognized Component, CE Marked, UL Recognized Component	3966N12	000000

Hazardous-Location Submersible Liquid-Level Transmitters


For Liquids	For Liquids with Solids

FM and C-FM approved, these transmitters safely measure liquid levels where explosive gas or dust may be present. Set them at the bottom of your tank in applications that make traditional mounting difficult. They sense liquid levels by measuring the pressure from the weight of the liquid above them. All continuously send measurements, so you can monitor status and manage components in your system. Also known as level loggers, level sensors, and pressure transducers.

For Liquids with Solids—Transmitters for liquids with solids have an unobstructed sensing element that resists clogging and sludge buildup in water with particulate and sewage.

				Overall
	For Pressure	Accuracy	Max. Pressure @ Temp.	Dia.	Lg.	Temp. Range, ° F	Cable Lg., ft.	Input Voltage, V DC	For Container Type	Electrical Connection	Hazardous Location Rating	Enclosure Rating		Each
4 mA to 20 mA Output Signal







				For Liquids

				0 psi to 1 psi / 0 to 3 ft. H₂O	±0.25%	10 psi @ 70° F	1"	6 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K51	0000000


				0 to 2 psi / 0 to 5 ft. H₂O	±0.25%	20 psi @ 70° F	1"	6 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K53	000000
				0 to 4 psi / 0 to 10 ft. H₂O	±0.25%	40 psi @ 70° F	1"	6 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K55	000000
				0 to 6 psi / 0 to 15 ft. H₂O	±0.25%	60 psi @ 70° F	1"	6 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K57	000000
				0 to 13 psi / 0 to 30 ft. H₂O	±0.25%	125 psi @ 70° F	1"	6 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K59	000000




						For Liquids with Solids

						0 psi to 1 psi / 0 to 3 ft. H₂O	±0.25%	10 psi @ 70° F	1"	5 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K31	00000000


						0 to 2 psi / 0 to 5 ft. H₂O	±0.25%	20 psi @ 70° F	1"	5 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K33	00000000
						0 to 4 psi / 0 to 10 ft. H₂O	±0.25%	40 psi @ 70° F	1"	5 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K35	00000000
						0 to 6 psi / 0 to 15 ft. H₂O	±0.25%	60 psi @ 70° F	1"	5 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K37	00000000
						0 to 13 psi / 0 to 30 ft. H₂O	±0.25%	125 psi @ 70° F	1"	5 3/4"	-10 to 175	40	10 to 35	Open Tank	Wire Leads	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2	NEMA 6P	3450K39	00000000

Ultrasonic Transmitters

Measure the distance to objects and the level of liquids and materials despite size, shape, or surface finish, and send that information to other parts of your system. Unlike photoelectric switches, which use light to detect objects, these transmitters emit high-frequency sound waves that target small spots, so the surface and structure of your object won’t affect results. This makes them great for materials with uneven surfaces, such as granules and powder. They also sense objects in dirty and wet places, but they don’t work well where there’s wind, since it could disrupt their sound waves. Use their plug to quickly connect and disconnect to cables with a socket (sold separately). UL listed, C-UL listed, and CE marked, they meet American, Canadian, and European safety standards.

All transmitters have an analog output, which means they continuously send measurements to monitor status and manage components in your system.

Rated IP67, all of these transmitters seal out dust and water if briefly submersed.

Straight


	4-Pole M12 Plug

Digital—Some transmitters also have a digital output that signals your controller to turn components on or off whenever an object is detected or a set level is reached.

IO-Link Communication Protocol—Transmitters with IO Link connect to a programmable logic controller (PLC), so you can remotely change settings and receive error messages. You need an IO-Link controller (not included) to connect.

	Sensors														Cables with Socket
	No. of Outputs	Signal Output	Output Analog Signal	Sensing Distance	Input Voltage, V DC	Control Communication Protocol	Dia., mm	Lg., mm	Housing Material	Circuit Protection	Temp. Range, ° F	Enclosure Rating		Each		Each
With 4-Pole M12 Plug-In Connection







				Analog

				1	—	4 mA to 20 mA	40 mm to 300 mm	10 to 30	—	18	61	Stainless Steel	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N15	0000000	6897K36	000000


				1	—	4 mA to 20 mA	80 mm to 1.2 m	10 to 30	—	18	61	Stainless Steel	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N16	000000	6897K36	00000




						Digital/Analog

						2	PNP	4 mA to 20 mA	150 mm to 1.6 m	10 to 30	IO-Link	18	98	Stainless Steel	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N17	000000	6897K36	00000


						2	PNP	4 mA to 20 mA	250 mm to 3.5 m	10 to 30	IO-Link	30	103	Stainless Steel	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N18	000000	6897K36	00000

90° Elbow


	4-Pole M12 Plug

90° elbow transmitters are compact to fit in tight spaces. They’re best for conveyors.

Digital—Some transmitters also have a digital output that signals your controller to turn components on or off whenever an object is detected or a set level is reached.

	Sensors															Cables with Socket
	No. of Outputs	Signal Output	Output Analog Signal	Sensing Distance	Input Voltage, V DC	Dia., mm	Lg., mm	Wd., mm	Ht., mm	Housing Material	Circuit Protection	Temp. Range, ° F	Enclosure Rating		Each		Each
With 4-Pole M12 Plug-In Connection







				Digital/Analog

				2	PNP	4 mA to 20 mA	40 mm to 300 mm	10 to 30	18	38	20	53	Plastic	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N11	0000000	6897K36	000000


				2	PNP	4 mA to 20 mA	80 mm to 1.2 m	10 to 30	18	38	20	53	Plastic	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N12	000000	6897K36	00000
				2	PNP	0V DC to 10V DC	40 mm to 300 mm	10 to 30	18	38	20	53	Plastic	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N13	000000	6897K36	00000
				2	PNP	0V DC to 10V DC	80 mm to 1.2 m	10 to 30	18	38	20	53	Plastic	Overload, Reverse Polarity, Short Circuit	0 to 155	IP67	7635N14	000000	6897K36	00000

Mitutoyo SPC Transmitters


Mitutoyo Data Out Switch A Connection	Mitutoyo Data Out Switch B Connection

Mitutoyo Data Out Switch C Connection	6-Pin Mitutoyo Connection

Straight Mitutoyo Connection

Wirelessly transmit measurement data to a PC. Select the cable with the connection that is compatible with your measuring tool’s SPC output port. A wireless receiver (sold separately) is required. Measurement data can be imported into Microsoft Excel or any SPC software.

Electrical Connection	Communication Range, ft.	Lg.	Wd.	Ht.	Power Source	Batteries Included	Mfr. Series	Mfr. Model No.	For Mfr. Model No.		Each
Mitutoyo Data Out Switch A	60	1 3/4"	1 1/4"	3/4"	Battery	Yes	U-WAVE-T	02AZD730G-A, 02AZD790A	500-762-20, 500-763-20, 500-764-10, 552-313-10, 552-314-10, 552-315-10, 571-261-20, 573-701-20, 573-705, 573-721-20, 573-761-20	2424N1	0000000
Mitutoyo Data Out Switch B	60	1 3/4"	1 1/4"	3/4"	Battery	Yes	U-WAVE-T	02AZD730G-B, 02AZD790B	293-130, 293-330-32, 293-331-32, 293-332-32, 293-333-32, 293-335-32, 293-336-32, 293-350-32, 293-351-32, 293-960-32, 314-351-32, 317-351-32, 317-352-32, 323-350-32, 329-350-32, 329-351-32, 339-303, 340-351-32, 340-352-32, 340-720, 340-721, 342-371-32, 350-351-32, 350-352-32, 350-354-32, 389-351-32, 395-372-32, 395-373-32, 395-374-32, 406-350-32, 422-330-32	2424N2	000000
Mitutoyo Data Out Switch C	60	1 3/4"	1 1/4"	3/4"	Battery	Yes	U-WAVE-T	02AZD730G-C, 02AZD790C	164-164, 389-714, 500-170-32, 500-171-32, 500-172-32, 500-173, 500-505-10, 500-506-10, 500-507-10, 571-211-30, 571-212-30, 571-213-10, 572-210-30, 572-211-30, 572-213-10, 572-311-10, 572-313-10, 573-281-30, 573-282-30, 573-291-30	2424N3	000000
6-Pin Mitutoyo Connector	60	1 3/4"	1 1/4"	3/4"	Battery	Yes	U-WAVE-T	02AZD730G-E	209-954	2424N6	000000
Straight Mitutoyo Connector	60	1 3/4"	1 1/4"	3/4"	Battery	Yes	U-WAVE-T	02AZD730G-F, 02AZD790F	192-630-10, 192-631-10, 192-632-10, 543-392, 543-392B, 543-402, 543-402B, 543-472B, 543-701-02, 543-701B, 543-702B, 543-711B, 543-712-02, 543-712B, 543-721B, 543-722B, 543-726B, 543-727B, 543-731B, 543-732B, 543-736B, 543-737B, 543-782, 543-782B, 543-783, 543-783B, 543-791, 543-792, 543-792B, 543-793, 543-793B, 543-796, 543-796B, 547-217S, 547-218S, 547-312S, 547-400S, 547-500S, 547-520S, 547-561S, 570-312, 570-313, 570-314, 570-412, 570-414, 572-475, 575-123	2424N5	000000

Accessories and Replacements for SPC Transmitters

USB Connection
2.0	USB-A	60	5 1/2"	3 1/4"	1 1/4"	USB Cable	02AZD810D	U-WAVE-T	2412N1	0000000

			Pkg.
Replacement Button Cell Battery	1	7701K34	00000	00000	00000

Mitutoyo Bluetooth SPC Transmitters

Image of Product. Front orientation. SPC Transmitters. Bluetooth Connection.

Send measurement data via Bluetooth to PCs, smartphones, and tablets. Download a free app to connect to smartphones and tablets. Use the included USB receiver to connect to a PC.

Cannot Be Sold to California—Bluetooth transmitters cannot be sold in California due to energy efficiency requirements.

Electrical Connection	Communication Range, ft.	Lg.	Wd.	Dp.	Power Source	Batteries Included	Includes	Cannot Be Sold To		Each
10-Pin Mitutoyo Connector	32	2 1/2"	1 3/4"	3/4"	Battery	Yes	10-Pin SPC Cable with Mitutoyo Straight Connection, Single/Continuous Capture Switch, USB Charging Cable, USB Outlet Plug, USB Receiver	California	2403N11	0000000

USB Connection
Standard	Type	Communication Range, ft.	Lg.	Wd.	Ht.	Includes	Mfr. Model No.	For Mfr. Series		Each
2.0	USB-A	60	5 1/2"	3 1/4"	1 1/4"	USB Cable	02AZD810D	U-WAVE-T	2412N1	0000000

			Pkg.
	Pkg. Qty.		1-9	10-49	50-Up
Replacement Button Cell Battery	1	7701K34	00000	00000	00000