Level Sensors

Liquid level sensors detect or measure liquid in tanks and containers. They support pump control, inventory tracking and overfill protection.

Sensor Types

  • Ultrasonic sensors – non-contact continuous level
  • Capacitive sensors – point and continuous level
  • Optical sensors – compact point detection
  • Submersible pressure sensors – hydrostatic level
  • Float sensors – simple, dependable

Choosing a Sensor

Consider liquid type, tank size, mounting and the output you need. Foam, vapor and buildup affect some technologies.

Centro supplies liquid level sensors.

Related categories: Liquid Level | Water Gauges | Level Switches | Differential Pressure Control | Radar

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ICON UltraPro 500 Series - Ultrasonic Level Sensor

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The UltraPro 500 Ultrasonic Level Sensor is 2-Wire loop powered sensor designed to provide reliable accurate level measurement, flow monitoring, and volume of liquid in tanks, pits, sumps and open channels. The UltraPro 500 Ultrasonic Level Sensor is very reliable and offers both 4-20mA analog output with HART® protocol or output RS-485 Modbus.
Configure Product

Configure product to see pricing

The WIKA ILT-C01 (PN 14833190) is a 60 GHz FMCW free-beam radar level sensor with 4–20 mA current output and M12 4-pin connector. Designed for continuous, non-contact level measurement of liquids, oils, and bulk solids in industrial tanks and mobile machinery up to 212 °F (100 °C). The 4–20 mA output is ideal for long cable runs to PLCs or SCADA systems, while the M12 quick-disconnect enables fast installation and field replacement without rewiring. Rated IP67, 25 bar, ±5 mm accuracy. Vibration-resistant to 40g — engineered for hydraulic reservoirs, expansion tanks, and OEM machine integration.
Requires Quote
In Stock (875)Ships within 1 business day
The WIKA ILT-C01 (PN 14849668) delivers 60 GHz FMCW non-contact level measurement with a 0–5 V ratiometric voltage output and M12 4-pin connector. The 0–5 V signal is the preferred choice for short-distance wiring to voltage-input DAQ systems, embedded controllers, and analog I/O modules where current loops are not required. The M12 connector provides a secure, vibration-resistant mating connection suited to mobile working machines, forklifts, and industrial equipment subject to shock. Rated for media temperatures up to 212 °F (100 °C), 25 bar, IP67. Measuring range 100–5,000 mm, ±5 mm accuracy.
Requires Quote
In Stock (339)Ships within 1 business day
The WIKA ILT-C01 (PN 14849669) provides 60 GHz FMCW non-contact level measurement with a 4–20 mA current output and a 2-metre pre-wired PVC cable. The integrated cable eliminates the need for a separate mating connector, making it ideal for permanent panel wiring, junction box termination, and installations where routing flexibility is more important than quick-disconnect capability. The 4–20 mA signal ensures reliable signal transmission over long cable distances with high noise immunity. Suitable for industrial tanks, HVAC systems, wastewater applications, and mobile machinery. Rated IP67, 25 bar, up to 212 °F (100 °C), ±5 mm accuracy.
Requires Quote
In Stock (495)Ships within 1 business day
The WIKA ILT-C01 (PN 14849670) offers 60 GHz FMCW non-contact level measurement with a 0–5 V voltage output and a 2-metre pre-wired PVC cable. This combination is well-suited for OEM equipment integration where the sensor is hardwired at the factory into a voltage-input control system, removing connector cost and complexity. The flexible PVC cable accommodates tight routing around obstacles in compact machine enclosures. Ideal for coolant tanks, hydraulic reservoirs, and container-level monitoring in industrial automation. IP67, 25 bar, media temperature up to 212 °F (100 °C), measuring range 100–5,000 mm.

$638.61

In Stock (146)Ships within 1 business day
The WIKA ILT-C05 (PN 14849671) is the high-temperature variant of the ILT free-beam radar level sensor, featuring a 4–20 mA current output and M12 4-pin connector. Rated for media temperatures up to 302 °F (150 °C), it is specifically designed for hot oil reservoirs, thermal fluid systems, steam-adjacent tanks, and heated process vessels where standard sensors cannot operate. The 4–20 mA output provides noise-immune signal transmission over long cable runs to PLCs and control panels, and the M12 connector allows fast sensor swap-out during maintenance without downtime. IP67, 25 bar, 60 GHz FMCW, ±5 mm accuracy. Min. pipe diameter 18 mm.
Requires Quote
In Stock (97)Ships within 1 business day
The WIKA ILT-C05 (PN 14849672) delivers non-contact 60 GHz FMCW level measurement at media temperatures up to 302 °F (150 °C), with a 0–5 V voltage output and M12 4-pin connector. The voltage output is ideal for integration with embedded controllers, machine PLCs, and analog input cards that accept 0–5 V signals directly, avoiding the need for current-to-voltage conversion. The M12 connection is especially practical in high-temperature environments where frequent maintenance or sensor replacement is required. Suited for hot hydraulic circuits, heated industrial tanks, and high-temperature mobile machinery. IP67, 25 bar, ±5 mm accuracy, min. pipe diameter 18 mm.
Requires Quote
In Stock (49)Ships within 1 business day
The WIKA ILT-C05 (PN 14849673) is a high-temperature 60 GHz FMCW radar level sensor with 4–20 mA output and a 2-metre pre-wired PVC cable, rated for media up to 302 °F (150 °C). The factory-attached cable makes this variant ideal for permanent installation in high-temperature process environments — such as heated chemical tanks, hot-water storage vessels, thermal oil systems, and industrial dryers — where a fixed wiring layout is preferred over connectorized designs. The industry-standard 4–20 mA signal travels reliably over long distances without interference from surrounding equipment. IP67 ingress protection, 25 bar pressure rating, ±5 mm accuracy, min. pipe diameter 18 mm.
Requires Quote
Available for Purchase

Subject to factory lead times

The WIKA ILT-C05 (PN 14849674) combines high-temperature performance up to 302 °F (150 °C) with a 0–5 V voltage output and 2-metre pre-wired PVC cable — ideal for OEM manufacturers integrating a radar level sensor directly into high-temperature equipment at the production stage. The hardwired cable and voltage output eliminate connector cost and simplify assembly, making this variant well-suited for bespoke industrial machines, heated OEM enclosures, and high-temp process skids where the sensor is specified once and installed for the long term. 60 GHz FMCW, IP67, 25 bar, ±5 mm accuracy, non-contact, maintenance-free, min. pipe dia. 18 mm.

$713.34

Available for Purchase

Subject to factory lead times

Continuous Level, SS Stem, PP Float, 1/4'' Resolution, 4-20mA Output, 16'' Sense Length, 1 1/2'' PP Fitting, 24'' Leads, 0.5" Top Deadband, 2.13" Bottom Deadband

$517.33$649.00

You save 20%
In Stock (20)Ships within 1 business day
Continuous Level, SS Stem, SS Float, 1/4'' Resolution, 4-20mA Output, 21.13'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.19" Top Deadband, 1.69" Bottom Deadband

$656.03$823.00

You save 20%
Low Stock (3)Ships within 1 business day
Continuous Level, SS Stem, Buna Float, 1/4'' Resolution, 4-20mA Output, 29.38'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.13" Top Deadband, 1.5" Bottom Deadband

$710.23$891.00

You save 20%
In Stock (7)Ships within 1 business day
The ICON UPS-2000-10 is an UltraPro 2000 Ultrasonic Level Sensor. It is commonly found in power generation, chemical processing, and pulp and paper applications. The UPS-2000-10 reflects ICON's long-standing reputation for quality and innovation.

$1,049.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

Engineered by ICON, the UPS-2000-10-XP is an UltraPro 2000 Ultrasonic Level Sensor. This product serves professionals across pulp and paper, oil and gas, and power generation sectors. Backed by ICON's commitment to quality, the UPS-2000-10-XP is built to perform under real-world conditions. This product meets relevant NEMA standards.

$1,159.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

Engineered by ICON, the UPS-2000-5 is an UltraPro 2000 Ultrasonic Level Sensor. This product serves professionals across power generation, oil and gas, and water and wastewater sectors. ICON products are trusted by engineers and specifiers worldwide.

$1,049.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

Engineered by ICON, the UPS-2000-5-XP is an UltraPro 2000 Ultrasonic Level Sensor. It is commonly found in water and wastewater, oil and gas, and chemical processing applications. ICON is recognized globally for engineering products that meet strict performance standards. This product meets relevant NEMA standards.

$1,159.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

High-quality, high-pressure conductivity probe designed for industrial liquid level monitoring in demanding environments. Built for durability and precision, it ensures accurate level detection and reliable system performance. Questtec 459600802

$264.65

Available for Purchase

Subject to factory lead times

Premium high-pressure liquid level probe designed for precise measurement and control in industrial applications. Engineered to deliver reliable performance in extreme environments, this probe is a trusted solution for critical level detection systems. Questtec 459600602

$586.09

Available for Purchase

Subject to factory lead times

Robust, high-pressure liquid level conductivity probe, expertly crafted for precision and reliability in industrial monitoring applications. Designed to operate in demanding environments, this probe ensures accurate and consistent liquid level measurement. Questtec 246781ZA

$808.95

Available for Purchase

Subject to factory lead times

Premium high-pressure liquid level probe designed for accurate and reliable level detection in industrial systems. It serves as a direct replacement for standard probes, ensuring compatibility and seamless integration into existing setups. Questtec 9300-0002

$808.95

Available for Purchase

Subject to factory lead times

High-pressure conductivity probe designed for precise liquid level measurement in industrial applications. This probe is a direct replacement for the Aquarian 9300-0002 and Yarway 964584-01 models, ensuring compatibility and seamless integration into existing systems. Questtec 964584-01

$808.95

Available for Purchase

Subject to factory lead times

High-performance conductivity probe tailored for industrial liquid level monitoring. Designed for precision and durability, it ensures reliable operation in demanding environments where accuracy and resilience are critical. Questtec "T"or "V" Type

$221.80

Available for Purchase

Subject to factory lead times

High-precision conductivity probe engineered for liquid level monitoring in industrial systems. Designed for durability and accuracy, it performs exceptionally well in demanding environments requiring reliable measurement and control. Questtec RZG020RK

$619.30

Available for Purchase

Subject to factory lead times

High-performance conductivity probe designed for industrial applications requiring precise liquid level monitoring and robust durability. Engineered to perform under demanding conditions, it ensures reliable performance across various industries. Questtec FG031R

$781.09

Available for Purchase

Subject to factory lead times

ICON UltraPro 500 Series - Ultrasonic Level Sensor

Configure product to see pricing

The UltraPro 500 Ultrasonic Level Sensor is 2-Wire loop powered sensor designed to provide reliable accurate level measurement, flow monitoring, and volume of liquid in tanks, pits, sumps and open channels. The UltraPro 500 Ultrasonic Level Sensor is very reliable and offers both 4-20mA analog output with HART® protocol or output RS-485 Modbus.
Configure Product

Configure product to see pricing

The WIKA ILT-C01 (PN 14833190) is a 60 GHz FMCW free-beam radar level sensor with 4–20 mA current output and M12 4-pin connector. Designed for continuous, non-contact level measurement of liquids, oils, and bulk solids in industrial tanks and mobile machinery up to 212 °F (100 °C). The 4–20 mA output is ideal for long cable runs to PLCs or SCADA systems, while the M12 quick-disconnect enables fast installation and field replacement without rewiring. Rated IP67, 25 bar, ±5 mm accuracy. Vibration-resistant to 40g — engineered for hydraulic reservoirs, expansion tanks, and OEM machine integration.
Requires Quote
In Stock (875)Ships within 1 business day
The WIKA ILT-C01 (PN 14849668) delivers 60 GHz FMCW non-contact level measurement with a 0–5 V ratiometric voltage output and M12 4-pin connector. The 0–5 V signal is the preferred choice for short-distance wiring to voltage-input DAQ systems, embedded controllers, and analog I/O modules where current loops are not required. The M12 connector provides a secure, vibration-resistant mating connection suited to mobile working machines, forklifts, and industrial equipment subject to shock. Rated for media temperatures up to 212 °F (100 °C), 25 bar, IP67. Measuring range 100–5,000 mm, ±5 mm accuracy.
Requires Quote
In Stock (339)Ships within 1 business day
The WIKA ILT-C01 (PN 14849669) provides 60 GHz FMCW non-contact level measurement with a 4–20 mA current output and a 2-metre pre-wired PVC cable. The integrated cable eliminates the need for a separate mating connector, making it ideal for permanent panel wiring, junction box termination, and installations where routing flexibility is more important than quick-disconnect capability. The 4–20 mA signal ensures reliable signal transmission over long cable distances with high noise immunity. Suitable for industrial tanks, HVAC systems, wastewater applications, and mobile machinery. Rated IP67, 25 bar, up to 212 °F (100 °C), ±5 mm accuracy.
Requires Quote
In Stock (495)Ships within 1 business day
The WIKA ILT-C01 (PN 14849670) offers 60 GHz FMCW non-contact level measurement with a 0–5 V voltage output and a 2-metre pre-wired PVC cable. This combination is well-suited for OEM equipment integration where the sensor is hardwired at the factory into a voltage-input control system, removing connector cost and complexity. The flexible PVC cable accommodates tight routing around obstacles in compact machine enclosures. Ideal for coolant tanks, hydraulic reservoirs, and container-level monitoring in industrial automation. IP67, 25 bar, media temperature up to 212 °F (100 °C), measuring range 100–5,000 mm.

$638.61

In Stock (146)Ships within 1 business day
The WIKA ILT-C05 (PN 14849671) is the high-temperature variant of the ILT free-beam radar level sensor, featuring a 4–20 mA current output and M12 4-pin connector. Rated for media temperatures up to 302 °F (150 °C), it is specifically designed for hot oil reservoirs, thermal fluid systems, steam-adjacent tanks, and heated process vessels where standard sensors cannot operate. The 4–20 mA output provides noise-immune signal transmission over long cable runs to PLCs and control panels, and the M12 connector allows fast sensor swap-out during maintenance without downtime. IP67, 25 bar, 60 GHz FMCW, ±5 mm accuracy. Min. pipe diameter 18 mm.
Requires Quote
In Stock (97)Ships within 1 business day
The WIKA ILT-C05 (PN 14849672) delivers non-contact 60 GHz FMCW level measurement at media temperatures up to 302 °F (150 °C), with a 0–5 V voltage output and M12 4-pin connector. The voltage output is ideal for integration with embedded controllers, machine PLCs, and analog input cards that accept 0–5 V signals directly, avoiding the need for current-to-voltage conversion. The M12 connection is especially practical in high-temperature environments where frequent maintenance or sensor replacement is required. Suited for hot hydraulic circuits, heated industrial tanks, and high-temperature mobile machinery. IP67, 25 bar, ±5 mm accuracy, min. pipe diameter 18 mm.
Requires Quote
In Stock (49)Ships within 1 business day
The WIKA ILT-C05 (PN 14849673) is a high-temperature 60 GHz FMCW radar level sensor with 4–20 mA output and a 2-metre pre-wired PVC cable, rated for media up to 302 °F (150 °C). The factory-attached cable makes this variant ideal for permanent installation in high-temperature process environments — such as heated chemical tanks, hot-water storage vessels, thermal oil systems, and industrial dryers — where a fixed wiring layout is preferred over connectorized designs. The industry-standard 4–20 mA signal travels reliably over long distances without interference from surrounding equipment. IP67 ingress protection, 25 bar pressure rating, ±5 mm accuracy, min. pipe diameter 18 mm.
Requires Quote
Available for Purchase

Subject to factory lead times

The WIKA ILT-C05 (PN 14849674) combines high-temperature performance up to 302 °F (150 °C) with a 0–5 V voltage output and 2-metre pre-wired PVC cable — ideal for OEM manufacturers integrating a radar level sensor directly into high-temperature equipment at the production stage. The hardwired cable and voltage output eliminate connector cost and simplify assembly, making this variant well-suited for bespoke industrial machines, heated OEM enclosures, and high-temp process skids where the sensor is specified once and installed for the long term. 60 GHz FMCW, IP67, 25 bar, ±5 mm accuracy, non-contact, maintenance-free, min. pipe dia. 18 mm.

$713.34

Available for Purchase

Subject to factory lead times

Continuous Level, SS Stem, PP Float, 1/4'' Resolution, 4-20mA Output, 16'' Sense Length, 1 1/2'' PP Fitting, 24'' Leads, 0.5" Top Deadband, 2.13" Bottom Deadband

$517.33$649.00

You save 20%
In Stock (20)Ships within 1 business day
Continuous Level, SS Stem, SS Float, 1/4'' Resolution, 4-20mA Output, 21.13'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.19" Top Deadband, 1.69" Bottom Deadband

$656.03$823.00

You save 20%
Low Stock (3)Ships within 1 business day
Continuous Level, SS Stem, Buna Float, 1/4'' Resolution, 4-20mA Output, 29.38'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.13" Top Deadband, 1.5" Bottom Deadband

$710.23$891.00

You save 20%
In Stock (7)Ships within 1 business day
The ICON UPS-2000-10 is an UltraPro 2000 Ultrasonic Level Sensor. It is commonly found in power generation, chemical processing, and pulp and paper applications. The UPS-2000-10 reflects ICON's long-standing reputation for quality and innovation.

$1,049.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

Engineered by ICON, the UPS-2000-10-XP is an UltraPro 2000 Ultrasonic Level Sensor. This product serves professionals across pulp and paper, oil and gas, and power generation sectors. Backed by ICON's commitment to quality, the UPS-2000-10-XP is built to perform under real-world conditions. This product meets relevant NEMA standards.

$1,159.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

Engineered by ICON, the UPS-2000-5 is an UltraPro 2000 Ultrasonic Level Sensor. This product serves professionals across power generation, oil and gas, and water and wastewater sectors. ICON products are trusted by engineers and specifiers worldwide.

$1,049.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

Engineered by ICON, the UPS-2000-5-XP is an UltraPro 2000 Ultrasonic Level Sensor. It is commonly found in water and wastewater, oil and gas, and chemical processing applications. ICON is recognized globally for engineering products that meet strict performance standards. This product meets relevant NEMA standards.

$1,159.78

Should ship between 04 Dec and 18 Dec

Subject to factory lead times

High-quality, high-pressure conductivity probe designed for industrial liquid level monitoring in demanding environments. Built for durability and precision, it ensures accurate level detection and reliable system performance. Questtec 459600802

$264.65

Available for Purchase

Subject to factory lead times

Premium high-pressure liquid level probe designed for precise measurement and control in industrial applications. Engineered to deliver reliable performance in extreme environments, this probe is a trusted solution for critical level detection systems. Questtec 459600602

$586.09

Available for Purchase

Subject to factory lead times

Robust, high-pressure liquid level conductivity probe, expertly crafted for precision and reliability in industrial monitoring applications. Designed to operate in demanding environments, this probe ensures accurate and consistent liquid level measurement. Questtec 246781ZA

$808.95

Available for Purchase

Subject to factory lead times

Premium high-pressure liquid level probe designed for accurate and reliable level detection in industrial systems. It serves as a direct replacement for standard probes, ensuring compatibility and seamless integration into existing setups. Questtec 9300-0002

$808.95

Available for Purchase

Subject to factory lead times

High-pressure conductivity probe designed for precise liquid level measurement in industrial applications. This probe is a direct replacement for the Aquarian 9300-0002 and Yarway 964584-01 models, ensuring compatibility and seamless integration into existing systems. Questtec 964584-01

$808.95

Available for Purchase

Subject to factory lead times

High-performance conductivity probe tailored for industrial liquid level monitoring. Designed for precision and durability, it ensures reliable operation in demanding environments where accuracy and resilience are critical. Questtec "T"or "V" Type

$221.80

Available for Purchase

Subject to factory lead times

High-precision conductivity probe engineered for liquid level monitoring in industrial systems. Designed for durability and accuracy, it performs exceptionally well in demanding environments requiring reliable measurement and control. Questtec RZG020RK

$619.30

Available for Purchase

Subject to factory lead times

High-performance conductivity probe designed for industrial applications requiring precise liquid level monitoring and robust durability. Engineered to perform under demanding conditions, it ensures reliable performance across various industries. Questtec FG031R

$781.09

Available for Purchase

Subject to factory lead times