A recognized leader in non-contact ultrasonic level sensors, Flowline offers some of the most reliable and cost effective solutions for the measurement and control of chemical, waste, and ultrapure liquids. Flowline products, made in the USA, are sold worldwide and are broadly applied in industrial, OEM, municipal, and agricultural containment applications. With over 750,000 successful installations worldwide, Flowline is level made simple.

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Flowline EchoPulse LR30 Radar Level Transmitter
Continuous liquid level measurement up to 98.4ft (30m) with a 4-20 mA signal output, remote push button display module
$2,295.00
Flowline Echosonic II Ultrasonic Level Transmitter
General-purpose ultrasonic level transmitter for non-contact measurement for liquid levels up to 32.8 feet
$535.00
In Stock
Flowline EchoPod DL14 Ultrasonic Level Sensor
Non-contact ultrasonic level switch, controller, and transmitter for small tanks
$380.00
In Stock
Flowline EchoWave Radar Level Transmitters
LG10 & LG11 guided wave radar, liquid level transmitters with 4-20mA output in choice of rod, coaxial or cable probe type
$1,045.00
Flowline EchoPod DL24 Ultrasonic Level Transmitter
Continuous level measurement up to 9.8' (3m) with a 4-20 mA signal output, and is configured via free WebCal software
$480.00
In Stock
Flowline EchoPulse LR15 Radar Level Transmitter
Continuous liquid level measurement up to 98.4ft (30m) with a 4-20 mA signal output, 1.5in NPT process mount
$2,095.00
Flowline EchoPod DL34 Ultrasonic Level Transmitter
Continuous level measurement up to 18.0’ (5.5m) with a 4-20 mA signal output, and is configured via free Webcal software
$580.00
In Stock
Flowline EchoPod DL10 Ultrasonic Level Transmitter
Continuous non-contact level measurement up to 49.2in (1.25m)
$330.00
In Stock
Flowline EchoPod UG01 & UG03 Reflective Ultrasonic Level Transmitters
Multi-function transmitter for continuous level measurement up to 9.8 ft. (3m) with a 4-20 mA analog signal output and four relays
$450.00
In Stock
Flowline EchoSpan Ultrasonic Level Transmitter
General purpose two-wire ultrasonic level transmitter for non-contact level measurements up to 32ft
$695.00
Flowline EchoSafe XP88 / XP89 Ultrasonic Level Sensor
Explosion proof, two-wire ultrasonic level transmitter for non-contact level measurement up to 10m
$1,345.00
Flowline FT10 / GT10 Thermo-Flo Liquid and Gas Flow Switch
General purpose flow switch provides reliable low or no-flow detection of relatively clean, non-coating media with one 1A relay output
$200.00
Flowline EchoPod DX10 Ultrasonic Level Transmitter
General purpose ultrasonic sensor providing non-contact level measurement
$300.00
Flowline Commander Multi-Channel Controller
General purpose, multi-channel controller for a wide range of monitoring and control applications
$995.00
Flowline EchoSwitch Ultrasonic Level Switch
Non-contact level detection up to 26.2ft (8m) with 3 programmable relays and a 4-20mA signal output
$795.00
Flowline EchoTouch LU20 Ultrasonic Level Transmitter
Intrinsically safe, two-wire ultrasonic transmitter provides non-contact level measurement up to 18' in hazardous environments
$950.00
Flowline LU10 Switch Tek Ultrasonic Level Switch
CSA approved intrinsically safe for use in hazardous environments, Submersible polypropylene or PFATeflon sensor and cable for corrosive liquids
$285.00
Flowline LV36 / LH35 / LV35 Switch Tek Float Level Switch
316 SS level sensor for high temp and pressure applications, dry contact reed switch selectable NO or NC via float orientation
$115.00
Flowline AV Float Series Float-Point Level Switch
Multi-point float level switch package for high temp and pressure, 316 stainless steel float, guide and process mounting plug
Select options for pricing
Flowline LC10 / LC11 Switch Pro Level Controller
Compact level switch, two configurations for pump and valve control, fail safe relay control of pumps or valves with 0-60 second delay
$215.00
Flowline EchoPulse LR10 Radar Level Transmitter
Continuous liquid level measurement up to 32.8ft (10m) with a 4-20 mA signal output, 1.5in NPT process mount
$1,995.00
Flowline LO10 Switch Tek Optic Leak Detection Switch
Submersible polypropylene or PFA Teflon sensor and cable for corrosive liquids, with fail-safe leak sensor
$175.00
Flowline DeltaView LI55 Level Controller
The Flowline DeltaView LI55 Level Controller displays engineering units with one 4 to 20 mA or 0 to 10 VDC continuous level sensor input.
$540.00
Flowline LV41 Switch Tek Float Level Switch
Mechanically actuated float switch intended for automatic start / stop of electrical components, submersible polypropylene body
$60.00
Flowline LC4 / LC9 Series Switch Pro Remote Level Controller
Three configurations for pump and valve control, fail-safe relay control of pumps or valves with 0-60 second delay
$210.00
Flowline EchoPod UG06 & UG12 Reflective Ultrasonic Level Transmitters
Multi-function transmitter for continuous level measurement up to 39.3 ft (12m) with a 4-20 mA analog signal output and four relays
$750.00
Flowline AV / AZ / AU Smart Trak Level Switch
Provides reliable, multi-point liquid level detection up to 10’ (3m) with 1-4 adjustable level switch points and a compact junction box
Select options for pricing
Flowline AX1X Thermo-Flo Flow Controller
Compact flow switch, reliable low flow or no flow detection of relatively clean non-coating media with a 16A relay
$520.00
Flowline DeltaSpan LD31 Submersible Pressure Level Transmitter
Continuous level measurement up to 46’ (14m) of water column with a 4-20 mA signal output
$770.00
Flowline DeltaSpan LD32 Submersible Level Transmitter
Continuous level measurement up to 46ft (14m) of water column with a 4-20 mA signal output
$1,155.00
Flowline LV10 Switch Tek Vertical Buoyancy Level Switch
Baffle body and stabilized float dampen out switch chatter, submersible polypropylene or PVDF sensor and cable for corrosive liquids
$120.00
Flowline LZ12 Switch Tek Vibration Level Switch
Reliable liquid level detection of dirty liquids such as those with light to medium coating, scaling or foaming characteristics with a 1A relay output
$305.00
Flowline DataKeep 300500 XP Level Indicator
Explosion-proof, loop-powered level indicator for wall mounting in hazardous environments
$1,595.00
Flowline AX1X Switch Pak Level Switch
Polypropylene or PVDF single-point level switch package for corrosive liquids, 60VA relay or 15VA dry contact selectable
$335.00
Flowline LH25 / LV20 Switch-Tek Level Switch
Simple low-cost level switch solution for basic applications, offered in both vertical and horizontal mounting configurations
$28.00
Flowline LV42 Switch Tek Sump Float Level Switch
Mercury-free self counter-weighted float switch, submersible polypropylene body and PVC cable for corrosive liquids
$170.00
Flowline EchoPulse LR20 Radar Level Transmitter
Continuous liquid level measurement up to 98.4ft (30m) with a 4-20 mA signal output, accuracy: ±3mm
$2,650.00
Flowline DeltaSpan LD30 Pressure Level Transmitter
General purpose level transmitter provides continuous level measurement up to 69ft (21m) of water column with a 4-20 mA signal output
$320.00
Flowline FloaTek LV55 Float Level Transmitter
The general purpose float level transmitter provides continuous level measurement up to 6.5’ (2m) with a 4-20 mA signal output
$910.00
Flowline EchoTouch GP Ultrasonic Level Transmitter
General purpose, three-wire ultrasonic transmitter provides non-contact level measurement up to 24'
$995.00
Flowline LP15 Switch Tek Capacitance Level Switch
Guard circuit optimizes performance in coating type media, submersible polypropylene sensor body and cable for corrosive liquids
$265.00
Flowline EchoPod DS14 Ultrasonic Level Switch
General purpose, non-contact ultrasonic level switch and controller for small tanks
$355.00
Flowline LC30 Thermo-Flo Flow Controller
Compact flow switch w/ fail-safe relay control of pumps or valves w/ 0-60 second delay, provides one 16A relay for low-flow pump or process protection
$220.00
Flowline LD35 DeltaSpan Pressure Level Transmitter
Small-Bore Pressure Level Transmitter, corrosion resistant 316 SS transducer with polyurethane or ETFE cable
$1,155.00
Flowline LD34 DeltaSpan Pressure Level Transmitter
Welded 316 SS body, provides continuous level measurement up to 100’ (30.4m) of water column with a 4-20mA signal output
$880.00
Flowline AZ13 / AU13 / AV13 Switch Pak Level Controller
Level switch, Polypropylene or PVDF single-point package for corrosive liquids, fail-safe relay control of pumps or valves with 0-60 second delay
Select options for pricing
Flowline AZ18 / AU18 Switch Pro Level Switch
Liquid level detection with one 1A relay and a compact junction box for integral wiring termination, for corrosive liquid applications
$460.00
Flowline DataPoint LC52
Single Tank Level Indicator with 2 relays, 1 to 3 set points and an isolated analog repeater
$370.00
Flowline LC80 / LC82 Remote Flow Controller
Remote Flow Switch, offered in two configurations for low-flow pump and process protection, fail-safe relay control of pumps or valves
$225.00
Flowline LH29 Interstitial Leak Detection Switch
Valox sensor body with PP float and Halar jacketed cable for corrosive liquids, Flat/low profile sensor with minimal float
$250.00
Flowline AZ23 / AU23 / AV23 Smart Trak Level Controller
Compact, fail-safe relay control of pumps or valves with 0 to 60 second delay, choice of ultrasonic, vibration or buoyancy technology
Select options for pricing
Flowline LP50 Switch Tek Level Switch
Non-Intrusive Capacitance Level Switch, level detection through plastic or fiberglass walls, polyethylene, polypropylene or PVDF adhesive 3M mounting brackets
$230.00
Flowline AV17 Float Point Drum Alarm
Portable, 9V battery powered LED alarm with test switch, Single or two-point alarm for 55, 30 and 20 gallon drums
$480.00
Flowline Fob USB Interface
Facilitates communication between WebCal software and Flowline level transmitters
$50.00
In Stock
Flowline LI40 PodView Local Level Indicator
Displays engineering units for level or volume level readings and shares power with an EchoPod ultrasonic sensor, including loop powered devices
$210.00
Flowline Installation Fittings
Installation fittings for Flowline Level Transmitters
$8.00
In Stock
Flowline LI99-2001 Fob USB Interface
Facilitates communication between WebCal software and Flowline level transmitters
$50.00
In Stock
Flowline FT50-5000 Flow Switch Fitting
Pulse-point fitting for metering pump applications, for use with FT10/GT10 liquid & gas flow switch
$95.00
Flowline NEMA Box Two Indicator
NEMA box, two indicator, Non-Windowed 1/8" DIN
$320.00
Flowline LM93-1001 Two Indicator, Windowed, 1/8 DIN, Polycarbonate NEMA Box
$490.00
Flowline LV49-7000 Counter weight
Counter Weight for Switch Tek Sump Float LV41/LV42 series
$6.00
Flowline LC95-2001 AC-DC Sensor & Indicator Power Supply
100-240 VAC, 24 VDC @ 0.45A, 35mm Rail
$265.00
Flowline Smart Trak Multi-Point Switch Fitting
Smart Trak Multi-Point Switch Fitting: 2', 4', 6', 8', 10', 1m, 2m or 3m length options
$80.00
Flowline Smart Trak Level Switch Car Kit
Smart Trak Level Switch Car Kit
$30.00
Flowline Switch-Pak Single-Point Switch Fitting
Switch-Pak Single-Point Switch Fitting: PVC, PP or PVDF
$35.00
Flowline LV49-9000 Cable Hanger
Cable Hanger for Switch Tek Sump Float series
$110.00
Flowline LM53 Flange Fittings
Flange, ANSI x thread, 3", 4" and 6" sizes available, CPVC and 316 stainless steel material options
$250.00
Flowline Single Controller NEMA Box
Single Controller, Windowed, 35mm Rail, Polycarbonate
$410.00
Flowline Single Controller NEMA Box
Two Controller, Windowed, 35mm Rail, Polycarbonate
$540.00
Flowline Intrinsic Safety Barrier
Intrinsic safety barrier for Flowline EchoTouch level transmitter
$850.00
Flowline LP95 Mounting Bracket
Non-Intrusive Capacitance Mounting Bracket: polyethylene, polypropylene or PVDF
$25.00
Flowline LM51-1800 Reducer Bushing
2 inch NPT x 3/4 inch NPT, PVC, Sch 80 reducer bushing
$30.00
Flowline LM53 Reducer Bushings
Reducer bushing, thread x thread, NPT, 2" or 3" models
$40.00
Flowline LM51-2S00 Reducer Bushing
2 inch NPT x 3/4 inch NPT, 316 stainless steel reducer bushing
$125.00
Flowline LD90 Junction Box Terminal Strip
Junction Box Terminal Strip, NPT or G plug, PP or PVDF
$140.00
Flowline NEMA Box Single Indicator
Nema box, Single Indicator, Non-Windowed 1/8" DIN
$225.00