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Flowline ultrasonic liquid level sensors emit a sound impulse and measure the echo's return time from the material's surface. Unaffected by environments with dirty, sticky or scaling media, these sensors are available in contact and non-contact versions, with models designed for hazardous or high-condensation locations. Level switches detect the presence of liquids at a specific level.
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Ultrasonic Level Sensors and Switches
Category Selection
Flowline general purpose and intrinsically safe ultrasonic liquid level sensors are non-contact sensors and switches ideal for applications with dirty, sticky, and scaling liquids. They are available with single- and multi-function capabilities, including continuous level measurement, switching, and control, and offer features such as:
- Flowline's innovative Reflective Technology (on select models) provides reliable level measurement in condensing environments.
- Polyvinylidene fluoride (PVDF) transducers suitable for corrosive environments
- Adjustable fail-safes
- Automatic temperature compensation for reliable and consistent level measurement
- WEBCAL software or integral pushbutton LCD display configuration options
- Rugged aluminum, polycarbonate, or polypropylene housings
Intrinsically safe ultrasonic level switches can be mounted through a tank wall or inside a tank to provide high- or low-level detection of chemical, solvent, or low viscosity petroleum-based liquids.
For part listings and specifications, go to Shop Now
EchoPod DL/DS/DX Series
Flowline EchoPod DL/DS/DX series general-purpose ultrasonic level sensors provide continuous level measurement and are available with current, frequency, relay, or voltage output options.
- Sensing distances up to 5.5m (18ft)
- 4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC, 976 to 2000 Hz, or 4 SPST relay output options
- 12 to 24 VAC/VDC, 12 to 24 VDC, or 14 to 28 VDC operating voltage options
- Narrow 2in. or 3in. beam width for space-limited applications
- Select models offer short dead bands optimized for small tanks
- Configurable via WEBCAL software
- 1in. or 2in. male NPT process connection
- Vertical top mounting
- NEMA type 6P, IP67 protection rating
Starting at
$400.00
(DL10-00)
EchoPod UG Series
Flowline EchoPod UG series general-purpose reflective ultrasonic level sensors feature Flowine's innovative Reflective Technology™ that delivers reliable level measurement in condensing environments.
- Sensing distances up to 12m (39.3ft)
- 4 to 20 mA or 4 SPST relay output options
- 14 to 28 VDC operating voltage
- Fail-safe diagnostics with selectable outputs
- Narrow 2in., 3in., or 6in. beam width for space-limited applications
- Short 1.5in. dead band on select models maximize tank filling capacity
- Configurable via WEBCAL software
- Select models offer an integral pushbutton LCD display for level indication and limited configuration options
- 2in. or 3in. male NPT process connection
- Vertical top mounting
- Type 6P, IP68 protection rating
Starting at
$525.00
(UG01-0001-40)
EchoSonic II Series
Flowline EchoSonic II series general-purpose ultrasonic level sensors provide continuous level measurement for larger tanks up to 10m (32.8ft).
- Sensing distances up to 10m (32.8ft)
- 4 to 20 mA output
- 14 to 28 VDC operating voltage
- Narrow 2in. or 3in. beam width for space-limited applications
- Short 4in. or 8in. dead bands maximize tank filling capacity
- 1in. or 2in. male NPT process connection
- Configurable via WEBCAL software
- Vertical top mounting
- NEMA type 6P, IP67 protection rating
Starting at
$750.00
(LU27-00)
EchoSpan Series
Flowline EchoSpan general-purpose level transmitters provide continuous level measurement up to 32.8 ft (10m) with a 4-20 mA signal output and are configured via an integral pushbutton display module.
- Sensing distances up to 10m (32.8ft)
- 12 to 28 VDC operating voltage
- Fail-safe intelligence and diagnostic feedback
- Narrow 2in. or 3in. beam width for space-limited applications
- Configurable via integral pushbutton LCD display
- 1in. or 2in. male NPT process connection
- Vertical top mounting
- NEMA type 4X, IP65 protection rating
Starting at
$800.00
(LU80-5101)
EchoSwitch Series
Flowline EchoSwitch series general-purpose ultrasonic level sensors provide continuous level detection up to 26.2 ft (8m) with three programmable relays for level switch or level control functions, and a 4-20 mA signal output.
- Sensing distances up to 8m (26.2ft)
- 4-20 mA, 1 SPDT relay, and 2 SPST-N.O. relay outputs
- 95 to 250 VAC operating voltage
- Separate 12 to 28 VDC power supply required for 4-20 mA loop output
- Narrow 2in. or 3in. beam width for space-limited applications
- Configurable via integral pushbutton LCD display
- 1in. or 2in. male NPT process connection
- Vertical top mounting
- NEMA type 4X, IP65 protection rating
Starting at
$1,035.00
(LU77-5004)
EchoTouch Series
Flowline EchoTouch intrinsically safe reflective ultrasonic level transmitters provide continuous level measurement with a 4-20 mA analog signal output and feature Flowline's proprietary Reflective Technology™ that delivers reliable level measurement in condensing environments.
- Sensing distances up to 6m (19.6ft)
- 14 to 28 VDC operating voltage
- Intrinsically safe approvals for hazardous locations
- Fail-safe diagnostics with selectable fail-safe signal outputs
- Narrow 2in. or 3in. beam width for space-limited applications
- Configurable via WEBCAL software
- Select models offer an integral pushbutton LCD display for level indication and limited configuration options
- 2in. male NPT process connection
- Vertical top mounting
- Type 6P, IP68 or 4X, IP66 protection rating
Starting at
$645.00
(US01-0001-00)
Switch-Tek Series
Flowline Switch-Tek series intrinsically safe ultrasonic point level switches are CSA approved for use in hazardous locations and provide reliable liquid level detection of chemical, solvent, hydrocarbon, and petroleum-based liquids. They offer a 1A relay output and can be mounted through a tank wall or inside a tank to provide high- or low-level alarm signals.
- 1A SPST relay output, selectable N.O. / N.C.
- 12 to 36 VDC operating voltage
- Intrinsically safe approvals for hazardous locations
- 10ft (3m) cable length
- 3/4” male NPT process connection
- NEMA 6, IP68 protection rating
Starting at
$330.00
(LU10-1305)
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