Ultrasonic water level transmitter comes with 4-20mA and RS485 dual communication outputs to match various industrial control systems. It offers a customizable 0-20 m measuring range with high precision up to ±2mm for precise liquid level readings. Built for harsh working conditions, it runs steadily within 0-95% humidity and tolerates medium temperatures from -20℃ to 75℃. The 0-20 cm blind zone design eliminates signal disturbance close to the probe, delivering stable real-time level monitoring for sewage tanks, water reservoirs and water treatment workshops.
- Upgraded Fully Sealed Probe Design: Ultrasonic water level sensor equipped with an upgraded seamless fully sealed probe. Gap-free structure stops liquid and water vapor infiltration to match the IP65 waterproof standard. Integrated tight housing shields internal circuits from water damage, greatly prolonging the service life of liquid level monitoring equipment in water treatment and outdoor tank projects.
- High-Precision Anti-Interference: A narrow, focused beam reduces messy echo disturbance for ultrasonic liquid level measurement. Delicate measuring precision meets rigorous monitoring standards of industrial storage tanks and sewage pools, delivering accurate real-time data for wastewater and water conservancy detection work.
- Built-In Measurement Blind Zone: Custom blind zone eliminates close-range measuring errors for ultrasonic water level sensor. Freely adjustable detection distance fits water tanks, reservoirs, and open river channels; no frequent recalibration is required for municipal water level monitoring tasks.
- Ultra-Wide Environmental Compatibility: Consistent measuring performance in high-humidity environments and a wide medium temperature range. Reliable long-running monitoring solution for indoor sewage processing equipment and outdoor reservoirs in industrial and municipal water level measurement applications.
Applications
Boasting versatile adaptability, the ultrasonic water level transmitter covers various measurement scenarios. It supports water level observation for flood control and reservoir scheduling, stable monitoring of industrial wastewater, height detection of grain stored in silos, and continuous level tracking for milk, juice, and other food liquids.
Sewage Water Level
Grain Silos
Juice Milk Storage Tanks
River Reservoir
| Model | SISCO-ULT-QDY70A |
| Communication category | 4-20mA/4-20mA+RS485+2 relays |
| Range | 0-20m (adjustable) |
| Measurement accuracy | ±2mm |
| Operating humidity | 0-95% |
| Medium temperature | -20~75℃ |
| Measurement blindness | 0-20cm |
| Measurement Resolution | Measurement range × 0.005% |
| Working Voltage | DC24V/DC12V |
| Antenna beam angle | 9° |
| Linkage output method | Relay output |
| Protection class | IP65 |
| Installation | Thread/Flange |
| Recommended cable | 3.5-6.5 mm cable |
| Weight | 800g |
Dimensions (unit: mm)
Installation
A. Installation method with A shorter top pipe and flange B.Installation on the top flange of the pipe is not possible
C. Installation method directly on the top threaded pipe D. Mounting method on the neck flange
Q1: What output signals do ultrasonic level sensors provide?
A1: This ultrasonic water level meter supports dual transmission signals of 4-20mA and RS485, and comes with relay linkage output to trigger on-site alarms or automatic control equipment. It works with DC12V and DC24V power supplies and is compatible with most standard industrial monitoring systems for liquid and solid material level measurement.
Q2: What is the recommended installation position for an ultrasonic level sensor?
A2: Two installation options are available: thread mounting and flange mounting. Install the ultrasonic water level sensor vertically above the measured medium, keep the designated blind zone distance from the medium surface, and avoid obstructions within the narrow antenna beam range to prevent signal interference. Ideal mounting spots include the top of reservoirs, sewage tanks, silos, and open river channels.
Q3: What is the difference between ultrasonic and capacitive level sensors?
A3: Ultrasonic water level sensors rely on sound wave reflection for non-contact measurement, featuring a long adjustable measuring range, a narrow anti-interference beam angle, and an IP67-sealed probe. They suit large reservoirs, sewage tanks, and bulk silos, stable under a range of temperatures and high humidity. Capacitive level sensors calculate liquid height via capacitance change, mostly for short-range small containers. Contact medium easily, is vulnerable to corrosion and foam interference, and only fits narrow, fixed-distance small-scale liquid monitoring.
Tips: What specifications should I check before buying an ultrasonic level transmitter?
- First, confirm the measuring performance metrics, including anti-interference beam design, measurement precision, and built-in blind zone to avoid reading errors.
- Second, verify environmental adaptability, including the applicable medium temperature range, humidity tolerance, and IP67 fully sealed probe for dust and water resistance.
- Third, check electrical configurations such as supported working voltages and available signal outputs like 4-20mA, RS485, and relay linkage control.
- Last, confirm flexible installation modes (thread or flange) and matching cable specifications to fit on-site tanks, reservoirs, and silos without extra modifications.
Thank you for buying industrial test and measurement equipment on SISCO.com, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.
What is covered?
SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.
What is not covered?
- Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
- Expendable parts.
- Routine cleaning or normal cosmetic and mechanical wear.
- Damage from misuse, abuse or neglect.
- Damage from use of parts other than SISCO approved.
- Damage from use outside the product’s usage or storage parameters.
- Damage from use of parts not sold by SISCO.
- Damage from modification or incorporation into other products.
- Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
- Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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