High-Range Radar Level Transmitter for Silos & Solids (120m) | SRL630-LR
The SRL630-LR High-Range FMCW Radar Level Meter is the industry-standard solution for non-contact level measurement in tall silos, high-dust environments, and challenging dry bulk storage. Operating at 76–81 GHz with a highly focused 3° beam angle, this sensor easily bypasses internal silo obstructions to target only the material surface.
With an exceptional measuring range of up to 120 meters and a highly stable tracking algorithm, the SRL630-LR effortlessly penetrates thick dust clouds, powder attachment, and severe condensation where legacy radar sensors fail.
Key Highlights:
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Unrivaled 120m Measurement Range: Ideal for the tallest industrial silos, coal bunkers, and cement bins.
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Ultra-Narrow 3° Beam Angle: Pinpoint accuracy that avoids false echo interference from silo walls or internal ladders.
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Metrology-Grade Precision: Consistent ±1mm accuracy for tight inventory control.
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Superior Dust Penetration: Advanced algorithm penetrates heavy powder dust and material buildup on the antenna lens.
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Instant Wireless Calibration: Safe, ground-level setup and debugging via integrated Bluetooth.
Description
In industries like cement production, mining, agriculture, and power generation, measuring dry bulk solids is notoriously difficult. Dense dust clouds during filling, angled material slopes, and narrow silo structures with internal support beams constantly cause false readings or complete signal loss in standard level sensors.
The SRL630-LR 80GHz FMCW Radar Level Transmitter is purpose-built to solve these exact bulk solids challenges. By utilizing a Frequency Modulated Continuous Wave (FMCW) signal with a massive 5GHz sweep bandwidth, it delivers unmatched measurement resolution and signal stability.
Why the SRL630-LR is the Ultimate Choice for Bulk Solids:
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Slices Through Extreme Dust & Build-Up: Unlike legacy radars, the 80GHz high-frequency signal carries high energy density. Coupled with Sentec’s unique signal processing, the radar can completely ignore heavy dust clouds and even penetrate thick layers of powder attached directly to the lens surface.
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Eliminates Silo Wall Interference: Tall, narrow silos suffer from “wall bounce” false echoes. The SRL630-LR concentrates its radar energy into an ultra-focused 3° beam. This narrow beam lets you install the sensor close to the silo wall or near internal structures without experiencing interference.
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No Aiming Flanges Required: Because the millimeter-wave signal has exceptional reflection characteristics on angled solid slopes, there is no need for expensive, complex mechanical aiming flanges to “target” the material.
Features
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Spherical PTFE Lens Antenna: Designed specifically to resist material sticking and condensation. The convex lens naturally sheds moisture and dry powders, remaining maintenance-free.
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Metrology-Level Accuracy: Features a stable ±1mm accuracy profile, allowing plants to perform highly precise material inventory calculations.
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Low Dielectric Constant Capability: High-gain signal easily measures low-density solids and powders with a dielectric constant as low as DK ≥ 1.5.
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Advanced Tracking Algorithms: The software filter ignores rapid level spikes, surface shifting, and uneven material cone angles for a rock-solid, averaged output.
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Convenient Bluetooth App Control: No more climbing dangerous, tall silos just to change a configuration parameter. Securely connect, calibrate, and upgrade the sensor from the ground using your smartphone.
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Hazardous Area Approved: Housed in a robust IP67 aluminum or stainless steel enclosure with ExdiaIICT6 explosion-proof ratings for flammable dust and gas environments.
Specification
| Parameter | Technical Specification |
| Operating Frequency |
76 GHz ~ 81 GHz (FMCW) |
| Measuring Range |
30m / 60m / 120m (Optional 10m version available) |
| Measurement Accuracy |
±1 mm |
| Beam Angle |
3° (Recommended for solids) or 8° |
| Process Temperature |
-40 to 85°C / 200°C (Up to 1200°C with isolation options) |
| Process Pressure |
-0.1 to 2.0 MPa (-1 to 20 bar) |
| Measurement Blind Zone |
3 cm (PTFE Lens version) |
| Output / Communication |
4-20mA / HART / Modbus |
| Local Interface |
128 × 64 dot matrix display with 4 push-buttons / PC Software / Bluetooth |
| Enclosure Material |
Die-Cast Aluminum or Stainless Steel |
| Antenna Design |
Spherical Lens (PTFE) with optional dust shields or air-purge connections |
| Explosion-Proof Rating |
ExdiaIICT6 |
| Protection Class |
IP67 |
| Process Connection |
Flange (DN80, DN100, DN125, DN150, DN200) or Thread |
FAQ
Q: How does the SRL630-LR handle heavy dust during silo filling cycles?
A: The SRL630-LR operates at a high 80GHz frequency, which has a very short wavelength and high energy concentration. Combined with Sentec’s dust-penetration algorithm, the radar wave passes straight through suspended airborne particles, reflecting off the actual solid surface below instead of the dust cloud.
Q: Do I need to buy a costly aiming/swivel flange to align the radar with the material slope?
A: No. Because 80GHz radar waves have superior reflection characteristics on sloped solid materials, the returned echo is highly stable even when reflecting off a steep cone. A standard horizontal flange installation is perfectly sufficient for the vast majority of dry bulk applications.
Q: What happens if fine powder builds up on the sensor’s lens over time?
A: The SRL630-LR utilizes a spherical, non-stick PTFE lens antenna. Its smooth, curved shape prevents powders from easily gathering on it. Furthermore, the sensor’s software is engineered to automatically compensate for minor surface coatings, maintaining signal strength even with dust attachment. For extreme cases, air-purge cleaning connections are available.
Q: Can we calibrate the sensor without climbing to the top of our 40-meter cement silo?
A: Yes, absolutely. The SRL630-LR features an active, built-in Bluetooth module. Your maintenance team can fully configure, test, and calibrate the sensor at ground level using a smartphone app, saving time and massively improving plant safety.
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