Miniature Ultrasonic Level Transmitter
The XY‑CT Series is a miniature ultrasonic level transmitter developed specifically for applications with limited installation space that demand high precision. It holds the distinction of being the first ultrasonic distance‑measuring product in China with a blind zone smaller than 0.06 m and an accuracy of ±1 mm.
The housing is made from copper‑plated or 304 stainless steel – compact yet exceptionally robust. The main chip uses an imported industrial‑grade microcontroller, combined with digital temperature compensation, ultra‑wide voltage input regulation, and multiple specialised integrated circuits, ensuring stable and reliable operation.
Description
Key Features
Ultra‑small blind zone – As low as <0.06 m, a domestic first for ultrasonic level products. Perfect for applications where space is tight and the sensor must be mounted close to the material surface.
High precision – Accuracy of ±1 mm to ±1.5 mm (depending on range), delivering exceptional measurement resolution.
Compact and rugged – The miniature housing (Φ28 mm × 100 mm) fits into the most confined installations, while the 304 stainless steel or copper‑plated construction ensures durability in demanding environments.
Automatic temperature compensation – Built‑in temperature sensor in the transducer enables real‑time compensation for stable readings across varying conditions.
Strong anti‑interference – Designed to perform reliably in electrically noisy industrial environments.
Flexible output options – Choose from analog (0‑20mA, 4‑20mA, 0‑5V, 0‑10V), digital (RS485 with Modbus support), or switch output. Upper and lower limit setpoints can be configured via host computer software.
Non‑contact measurement – Eliminates the problems of traditional contact methods – no fouling, clogging, leakage, corrosion, or maintenance headaches.
Intrinsically safe – Ex ia IIB T4 Gb explosion‑proof certification, compliant with GB3836.1‑2010 and GB3836.4‑2010 national standards.
Wide input voltage – DC 12‑24V with ultra‑low power consumption of <1.5W.
Easy installation – M30×1.5 thread connection, supplied with 1.5 m cable.
Simple Technical Overview (No Table)
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Measurement range: 1 m or 2 m (selectable at order)
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Blind zone: <0.06‑0.15 m (depends on range)
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Accuracy: ±1 mm or ±1.5 mm (depends on range)
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Beam angle: <6° (depends on transducer)
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Operating frequency: 40 kHz – 430 kHz (depends on model)
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Temperature compensation: Automatic
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Output options: 0‑20mA, 4‑20mA, 0‑5V, 0‑10V, RS485 (Modbus)
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Power supply: DC 12‑24V, <1.5W
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Housing material: 304 stainless steel (or copper‑plated)
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Dimensions: Φ28 mm × 100 mm × M30
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Mounting: M30×1.5 thread
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Protection rating: IP65 (higher ratings available on request)
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Explosion protection: Ex ia IIB T4 Gb
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Operating environment: Normal temperature and pressure
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Storage humidity: ≤80% RH, non‑condensing
Where It’s Used
Water & wastewater treatment – Pump stations, collection wells, biological reaction tanks, sedimentation tanks
Power & mining – Ash slurry tanks, coal slurry tanks, grease storage tanks, stockpiles, mobile equipment control
Food industry – Breweries, grain silos, food ingredient storage tanks and hoppers
General control systems – Level measurement and control in space‑constrained installations
Why Choose the XY‑CT Series
Unmatched blind zone performance – With a blind zone of less than 6 cm, this transmitter can be mounted closer to the material surface than any competing ultrasonic product, making it the ideal choice for shallow tanks, narrow sumps, and confined spaces.
Exceptional accuracy – ±1 mm precision ensures you get reliable, repeatable measurements even in critical applications where every millimetre counts.
Built to last – The robust stainless steel or copper‑plated housing withstands harsh industrial environments, while the non‑contact design eliminates wear and maintenance associated with traditional sensors.
Flexible and future‑ready – With analog, digital (RS485 Modbus), and switch outputs, plus remote configurability, this transmitter integrates seamlessly into new or existing control systems.
Certified safety – Ex ia IIB T4 Gb intrinsic safety certification means it can be used in hazardous areas with confidence.


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