WKSL-100 Compact Ultrasonic Level Sensor
- Ranges 0.3–5 m, 0.3–8 m, 0.5–12 m (selection L = 4–40 m)
- Accuracy ±0.3% × range; minimum resolution 1 mm; 12° beam angle
- Outputs: 4–20 mA (load >300 Ω), 0–5 V / 1–5 V, RS485 (Modbus), NPN switch
- Supply DC12–24 V, power <1.5 W; IP65
- Compact PP housing Φ83×145 mm, M65×1.5 mount; from 272 g
- Five types A–E: integrated 2/3/4-wire and split 4-wire versions
Tell us your medium, range and process connection — we reply within 24 hours.
Factory-direct from WELK Meters
- Small MOQ Welcome
- OEM / ODM Support
- Reply Within 24 Hours
Overview
The WKSL-100 is a compact ultrasonic level sensor for non-contact liquid level measurement over ranges of 0.3–5 m, 0.3–8 m and 0.5–12 m (range selection L = 4–40 m), with accuracy of ±0.3% × range and outputs including 4–20 mA, 0–5 V / 1–5 V, RS485 (Modbus) and an NPN switch output. Its low power draw (<1.5 W on DC12–24 V) and small PP housing make it easy to integrate into tanks, machines and OEM equipment.
The sensor operates in the 20 KHz–43.0 KHz frequency band with a narrow 12° beam angle and a minimum resolution of 1 mm. The blind zone is <0.3 m or <0.5 m depending on the range version, and a 4-digit 0.5-inch LED provides local indication. The housing measures Φ83×145 mm with an M65×1.5 mounting thread, weighing just 272 g (5 m version) or 410 g (12 m version), with IP65 protection and an operating temperature of -10 °C–60 °C.
Five types are available: A/B/C integrated versions in 2-wire, 3-wire and 4-wire configurations, plus D/E split 4-wire versions (simple and standard). This flexibility lets you match the electrical interface to your PLC, display or telemetry system.
Features
- Compact Φ83×145 mm PP housing, from 272 g
- Narrow 12° beam angle, minimum resolution 1 mm
- Accuracy ±0.3% × range
- Multiple outputs: 4–20 mA (load >300 Ω), 0–5 V / 1–5 V, RS485 Modbus, NPN switch
- Low power: DC12–24 V supply, <1.5 W
- 4-digit 0.5-inch LED local display
- Five electrical types: integrated 2/3/4-wire, split 4-wire simple/standard
Specifications
| Parameter | Value |
|---|---|
| Measuring ranges | 0.3–5 m, 0.3–8 m, 0.5–12 m (selection L = 4–40 m) |
| Blind zone | <0.3 m / <0.5 m |
| Beam angle | 12° |
| Minimum resolution | 1 mm |
| Accuracy | ±0.3% × range |
| Display | 4-digit 0.5-inch LED |
| Operating frequency | 20 KHz–43.0 KHz |
| Outputs | 4–20 mA (load >300 Ω), 0–5 V / 1–5 V, RS485 (Modbus), NPN switch |
| Power supply | DC12–24 V, <1.5 W |
| Housing | PP, Φ83×145 mm; mounting thread M65×1.5 |
| Weight | 272 g (5 m version) / 410 g (12 m version) |
| Protection rating | IP65 |
| Operating temperature | -10 °C–60 °C |
| Types | A/B/C integrated (2-wire / 3-wire / 4-wire); D/E split 4-wire (simple / standard) |
Applications
- Non-contact level measurement in small and medium tanks
- OEM machine and equipment integration (compact, low power)
- Level monitoring with PLC, display or telemetry systems via 4–20 mA, RS485 or switch output
FAQ
What outputs does the WKSL-100 offer?
4–20 mA (load >300 Ω), 0–5 V or 1–5 V analog, RS485 with Modbus, and an NPN switch output — selectable across five electrical types (integrated 2/3/4-wire and split 4-wire versions).
How accurate is the WKSL-100?
Accuracy is ±0.3% × range with a minimum resolution of 1 mm and a narrow 12° beam angle. Blind zone is <0.3 m or <0.5 m depending on range version.
Which range version should I order?
Standard versions cover 0.3–5 m, 0.3–8 m and 0.5–12 m, with range selection L = 4–40 m. Contact us with your tank height, medium and mounting details; we respond within 24 hours.
