External Ultrasonic Level Switch

Name: External Ultrasonic Level Switch
Brand: WELK Level

Externally mounted ultrasonic level switch for sealed tanks where a non-contact high/low alarm is required.

InstallOutside tank wall

DutyPoint level alarm

OutputRelay / transistor

UseSealed tanks

Request quote Attach files

Why choose· 01

Built for your duty.

No drilling into tank

External point detection is useful when welding or opening the vessel is undesirable.

Complements external gauges

This is the alarm/switch version of external ultrasonic measurement, not a continuous transmitter page.

Tank compatibility review

Wall material, thickness, lining, liquid acoustic properties and mounting position decide if the switch will work.

Engineer-checked selection

WELK checks medium, alarm height, mounting orientation, connection, output logic, power, contact rating and material requirement so the quoted configuration matches the application.

Application-matched configuration

Selection notes focus on real tank conditions, measuring range, process connection, output signal and installation limits.

Product details· 02

How it is selected & specified.

External ultrasonic level switches provide a point alarm from outside the tank wall for compatible sealed tanks.

WELK handles this as an application-reviewed switch product and require tank wall details before confirming suitability.

External Ultrasonic Level Switch is presented as a configurable WELK product family. Final model limits, wetted materials, process connection, certificate and output signal are confirmed from the selected datasheet before quotation.

Point level switch selection starts from medium behavior, alarm point, mounting direction, density or dielectric, buildup risk, process connection, power and contact logic.

Specifications· 03

External Ultrasonic Level Switch specification range.

Parameter	Value
Measuring principle	External ultrasonic point detection
Installation	Sensor mounted outside compatible tank wall
Output	Relay, transistor or digital switch by model
Media	Liquids with suitable acoustic coupling through tank wall
Limitations	Wall thickness, lining, corrosion and bubbles can affect detection
RFQ data	Tank material, wall thickness, liquid, alarm height, output and hazardous-area need
Temperature rating	-20-70℃
Power supply	24VDC
Ingress protection	IP 67
Material options	Titanium Alloy

Applications· 04

Where this product works.

Sealed fuel tanksChemical tanksNo-opening retrofit alarmsLPG application reviewHigh/low level alarmHigh level alarmLow level alarmPump protection

Application

Chemical Storage Tanks

Chemical and petrochemical storage

Wetted materials & output options.

Cast AluminumStainless SteelPlastic HousingMounting bracketCable lengthLogo/MarkingExplosion-proof option

Send medium, range, tank geometry, process connection and output signal for model review.

Packaging & shipping· 05b

Export packing as standard.

Packed for export with protected sensor head, probe/antenna/chamber support where needed, model label, wiring note and requested inspection or calibration documents.

Packaging and documents →

Spec siblings· 05c

Spec siblings & common external ultrasonic level switch specs.

Measuring principle Installation Output Media Limitations RFQ data

FAQ· 06

External Ultrasonic Level Switch questions.

How do I choose the switching point for External Ultrasonic Level Switch?

Start from medium, alarm height, mounting orientation, connection, output logic, power, contact rating and material requirement. WELK then confirms the exact model, material and output before quotation.

What is the difference between External Ultrasonic Level Switch and continuous transmitter?

External Ultrasonic Level Switch is selected for its specific duty and limitations. WELK compares it with continuous transmitter, radar, ultrasonic when the process data suggests another technology may be safer.

Can External Ultrasonic Level Switch be customized?

Yes. Range, process connection, wetted material, output signal, cable length, display, switch points, documents and OEM label can be reviewed by product family.

What are the common limits of External Ultrasonic Level Switch?

Sticky buildup, coating, turbulence, low density solids, non-conductive liquids or tank-wall material can make one switch principle unsuitable.

Are the listed specifications final for every project?

No. Published values are typical selection ranges. WELK confirms final limits, material, output, certificate and documents from the actual process data before quotation.

Need external ultrasonic level switch? Send the conditions.

Attach tank drawings, old instrument photos or datasheets if available.