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STEX41 Ultrasonic Level Transmitter
Explosion-Proof Certified • Advanced Ultrasonic Technology
MODEL STEX41

Smart Ultrasonic Level Transmitter

The latest addition to the REGAMOUNT™ family. The STEX41 is a highly reliable, non-contact ultrasonic level transmitter designed for measuring the level of liquids and solids in process units. Featuring advanced echo algorithms, built-in sound speed temperature compensation, and a robust explosion-proof enclosure.

Ex d IIC T6 Ga Ex ia IIC T6 Ga IP67 4-20mA + HART LCD Display Temp. Compensation
≤3mm
Repeatability
0.2%
Accuracy
IP67
Protection
128x64
Dot Matrix LCD
Request Quote → Download Datasheet
Power Supply12~32 VDC
Output Signal4~20 mA + HART
Blanking Zone0.2 ~ 2 m
Resolution≤ 3 mm
Operating Temp.-40°C ~ +85°C
Excitation Freq.30 ~ 50 KHz

Advanced Features

● Multi-Mode Measurement

Easily configurable for Distance, Level, or Empty Height measurement modes to suit any tank or silo application.

● Intelligent Echo Algorithms

Advanced false echo suppression with adjustable coefficients and minimum threshold settings to eliminate noise and interference.

● Built-in Temp. Compensation

Automatic sound speed correction based on ambient temperature, with manual calibration options for non-air environments (e.g., volatile gases).

● Rich LCD Interface

128x64 dot matrix display with backlight, showing real-time distance, loop current (mA), percentage, temperature, and diagnostic status (e.g., ECHO OK).

Technical Specifications

PERFORMANCE
Repeatability≤ 3mm or 0.2% of set distance
Resolution≤ 3mm
Blanking Zone0.2 ~ 2 m (adjustable)
Response RateFast (10m/min), Medium (1m/min), Slow (0.1m/min)
Excitation Frequency30 ~ 50 KHz (Factory default: 40 KHz)
Temp. CompensationBuilt-in sound speed compensation
ELECTRICAL & ENVIRONMENTAL
Power Supply12 ~ 32 VDC
Output Signal4 ~ 20 mA DC (2-wire) + HART
Operating Temp. (with LCD)-20°C ~ +70°C
Operating Temp. (no LCD)-40°C ~ +85°C
Ingress ProtectionIP67
Explosion ProofII 1G Ex d IIC T6 Ga / Ex ia IIC T6 Ga
Enclosure MaterialAluminum Alloy (SS316 optional)

Ordering Codes

OUTPUT & DISPLAY
-H4~20 mA DC with HART Communication
-DWith 128x64 Dot Matrix LCD Display
-NWithout LCD Display
SENSOR FREQUENCY
4040 KHz (Standard, up to ~10m range)
3030 KHz (Long range, requires board mod)
5050 KHz (Short range, high resolution)
Example Order Code
STEX41-H40D/E6/Q4

HART output • 40 KHz sensor • With LCD Display • SS316 Enclosure • 3rd Party Calibration Certificate

Available Options

MATERIALS & CERTIFICATES
/E6Enclosure Housing Material SS316
/P5IP65 (Non-Ex Model for Safe Area)
/P8Water-Proof IP68
/Q4Certificate of Calibration (by 3rd party)
/Q5Declaration of Material Test; Enclosure
MOUNTING & ACCESSORIES
/E1Electrical Connection Conduit ½" NPTF
/B2Mounting Bracket for Wall/Stand Pipe
/N4Wired Tag No. SS316 Plate
/SWHART Configuration Software License

⚠ Important Notice for Installation:

To achieve the desired Ingress Protection (IP67/IP68) and maintain Explosion-Proof certification, the user must ensure proper sealing of the electrical conduits and the sensor connection point. For non-air environments (e.g., volatile gases), the sound speed must be manually calibrated using the local adjustment menu or HART software to eliminate measurement errors.

Related Products

STEX11 – Gauge Pressure STEX14 – Differential Pressure STEX15 – Temperature STEX25 – Temperature LCD

Ready to Measure with STEX41?

Contact our technical team for tank sizing consultation, custom configurations, and competitive pricing for your level measurement applications.

Request Quote →