Reliable point level detection is essential in industrial tanks, silos, hoppers, vessels and process containers. In many applications, the level switch must operate accurately even when the medium contains solids, powder, granules, viscous liquids or particulate material.
The DX-ELT 102 Vibration Level Switch is designed for these demanding level control applications. With its resonance-based vibrating fork principle, stainless steel wetted parts, adjustable switching delay and robust aluminum housing, DX-ELT 102 provides a reliable solution for detecting liquid, solid and powder levels in industrial processes.
What Is DX-ELT 102?
DX-ELT 102 is a vibration type level switch used for point level detection. It belongs to the DX-ELT vibration level switch series, which includes models such as DX-ELT 101, DX-ELT 102, DX-ELT 104, DX-ELT 105, DX-ELT 201, DX-ELT 202, DX-ELT 204 and DX-ELT 205.
The device is used to detect whether material is present around the probe. When the medium covers the vibrating element, the vibration frequency decreases, and this change is converted into an electrical output signal.
DX-ELT 102 is suitable for applications involving liquids, solids and powders, making it a flexible solution for many industrial level control requirements.
Operating Principle
DX-ELT series sensors operate according to the resonance principle. Piezoelectric elements generate vibration in the probe.
When the probe is in air, it vibrates at its normal frequency. When liquid, solid particulate material or powder covers the probe area, the vibration frequency decreases significantly.
The electronics detect this frequency change and generate the output signal. This allows DX-ELT 102 to detect the presence or absence of material around the probe without requiring complicated calibration.
Designed for Difficult Media
DX-ELT vibration level switches are designed to operate reliably where some other level switch types may have difficulty. According to the catalog, the sensor is not affected by material sticking to the probe, impacts or jamming problems.
This makes DX-ELT 102 especially useful in applications where powders, granules, bulk solids or viscous liquids may cause unreliable operation in conventional level switches.
The high sensitivity of the vibration principle also supports stable switching in different process conditions.
Suitable for Side and Top Mounting
One of the important advantages of the DX-ELT series is installation flexibility. The device is suitable for both side mounting and top mounting.
Side mounting is useful for detecting a fixed level point on the vessel wall, such as high-level alarm or low-level alarm. Top mounting can be preferred when access from the tank side is limited or when vertical insertion is required.
This flexibility allows DX-ELT 102 to be adapted to different tank, silo and container designs.
Minimum and Maximum Fail-Safe Selection
DX-ELT 102 supports minimum and maximum fail-safe field selection. This allows the switch logic to be configured according to the safety requirement of the application.
For high-level applications, the device can be used to prevent overflow. For low-level applications, it can be used to protect pumps, prevent dry-running or indicate empty condition.
This makes the device practical for both process control and safety alarm applications.
Technical Specifications
DX-ELT 102 is suitable for liquid, solid and powder media. The wetted parts and fork material are 316 stainless steel, while the housing material is aluminum.
The maximum solid particle size is ≤ 10 mm, and the maximum liquid viscosity is < 1000 mm²/s.
The measurement density is ≥ 0.1 g/cm³ for solids and ≥ 0.7 g/cm³ for liquids.
For DX-ELT 102, the vibration frequency is 280 kHz. The delay time is 0.5 seconds for vibration stop and 1–2 seconds for vibration start. The switching delay can be adjusted between 1 and 60 seconds.
Output and Power Supply
DX-ELT 102 provides 2 x 8A NO/NC relay output for 24 VDC / 220 VAC applications.
The power supply range is 15–80 VDC and 15–260 VAC. Power consumption is 2.5 W, making the device suitable for low-power industrial operation.
The electrical connection page in the catalog shows power LED, status LED, sensitivity setting, delay setting, test function and DPDT contact structure for DX-ELT 102 / 104 / 202 / 204 models.
Pressure and Temperature Ratings
DX-ELT 102 is designed for demanding process conditions. The maximum working pressure is 40 bar.
The standard working temperature range is -20 °C to +145 °C. With the cooling apparatus option, the ordering table indicates a working temperature option up to +200 °C.
The ambient temperature range is -20 °C to +80 °C, and ambient humidity is 95% RH.
The protection class is IP66 / IP68 according to EN60529, supporting use in industrial field environments.
Mechanical Connection
The standard process connection for DX-ELT 102 is R 1" male thread. Flanged options are also available.
The catalog dimension table lists DX-ELT 102 with R 1" connection, 125 mm L dimension, 134 mm L1 dimension and 38 mm AA dimension.
The mechanical connection section also shows many threaded options from R 1/8" to R 2", as well as flanged options such as DN25, DN32, DN50, DN80 and DN100 according to ISO and ANSI standards.
ATEX and Exproof Certification
DX-ELT series is available with ATEX certification. The catalog lists certification as:
II 1/2G Ex db IIC Tx Ga/Gb
II 1/2D Ex (ta/tb) IIIC Tx Da/Db
The operating ambient range for certified conditions is shown as -20 °C to +60 °C, with IP66 protection.
The housing has EU-type examination certificate number TSE 22ATEX 0175U. The housing marking includes II 2G Ex d IIC Gb and II 2D Ex tb IIIC.
Housing and Protection
DX-ELT 102 uses B21x aluminum housing. The catalog lists housing order code 703, protection class IP66 / IP68, temperature range -40 °C to +200 °C and dimensions 132 x 104 mm.
The cover gasket is NBR nitrile rubber, suitable up to 120 °C, with FPM / Viton available as an option up to 200 °C.
The housing includes cable gland, plug, grounding terminal and product / metal labels. The recommended cable diameter is Ø6–12 mm, and the grounding terminal supports up to 1.5 mm².
Temperature Class Information
The catalog includes a temperature class table for DX-ELT metal models.
For Group II gas applications, the temperature class depends on process temperature:
T6 for process temperature below 80 °C
T5 for process temperature below 95 °C
T4 for process temperature below 130 °C
T3 for process temperature below 145 °C
For Group III dust applications, the table lists T60 °C for process temperature below 60 °C.
The catalog also states a 20-minute waiting time before opening the cover and notes that the thermal protection fuse is 105 °C.
Application Areas
DX-ELT 102 can be used in containers, vessels and silos for empty or demand alarm applications.
Typical materials listed in the catalog include free-flowing powders and granules, different types of bulk materials and powders, grains, beans, cooking oil, sugar, animal feed, rice plants, detergents, paint powder, chalk, gypsum, fly ash, cement, sand, plastic granules, spices and milk powder.
This broad application range makes DX-ELT 102 suitable for food, chemical, construction materials, agriculture, plastics and bulk solids handling processes.
Advantages of DX-ELT 102
DX-ELT 102 offers several practical advantages for industrial users. It is suitable for side and top mounting, supports minimum and maximum fail-safe selection and can operate at pressures up to 40 bar.
It has low power consumption, requires no calibration, provides adjustable switching delay and has a durable mechanical structure.
The catalog also states that the device is immune to external vibrations, which is important for installations near machinery, process equipment or vibrating structures.
Optional Accessories
The DX-ELT ordering structure includes several optional accessories.
A 304 stainless steel protection sleeve is available for outdoor tank applications. It is welded, hinged and openable / closable, helping protect the switch from external environmental conditions.
Detachable housing options are available with stainless steel flexible spiral or plastic flexible spiral, depending on model. A R 1" to R 2" reduction option is also listed.
Why Choose DX-ELT 102?
DX-ELT 102 is a strong choice when the application requires reliable point level detection in liquids, solids or powders.
Its vibrating fork principle, 316 stainless steel wetted parts, 40 bar pressure capability, adjustable delay, DPDT relay output and IP66/IP68 aluminum housing make it suitable for demanding industrial processes.
For users who need a no-calibration level switch with stable performance in difficult media, DX-ELT 102 provides a practical and durable solution.
Conclusion
The DX-ELT 102 Vibration Level Switch is a robust point level detection device for liquids, solids and powders. With 316 stainless steel wetted parts, 280 kHz vibration frequency, 2 x 8A NO/NC relay output, 40 bar pressure rating, -20 °C to +145 °C standard process temperature and IP66/IP68 protection, it provides reliable level monitoring for tanks, silos and industrial vessels.
From powders and granules to liquids and bulk materials, DX-ELT 102 helps operators improve process safety, prevent overflow, protect equipment and maintain stable level control in demanding industrial environments.