Non-Clogging Ceramic Sewage and Sludge Level Transmitter | SLS300B
A heavy-duty submersible hydrostatic transmitter featuring a premium anti-corrosive ceramic diaphragm, designed specifically to overcome clogging, erosion, and electrical surges in raw sewage, thick sludge, and industrial wastewater installations.
The SLS300B is the ultimate technical evolution for high-solids fluid management, completely replacing traditional metallic diaphragm sensors. By leveraging the high-hardness piezoresistive properties of an Al203 ceramic sensing element, the sensor resists scratches from harsh particulates and stands up to aggressive chemical compounds found in industrial effluents. Fully equipped with IEC 61000-4-5 Level-4 lightning defense, it ensures total continuity in exposed outdoor lifting stations and municipal wastewater facilities.
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Corrosion-Proof Ceramic Core: Advanced Al203 ceramic diaphragm provides unmatched resistance to abrasive solids and chemical erosion.
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Wastewater Optimization: Available in application-specific form factors optimized individually for raw sewage, high-sediment channels, and thick sludge.
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Level-4 Lightning Protection: Built-in transient clamping networks guard the internal electronics against severe electrical spikes.
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Versatile Signal Outputs: Supports traditional analog loops alongside modern digital integrations including RS485 Modbus and I2C.
Description
Engineered for High-Solids and Corrosive Fluids
Wastewater infrastructure poses a unique set of challenges: aggressive organic acids, turbulent media, and sharp physical debris that quickly degrade or ruin standard instrumentation. The SLS300B series relies on the robust hydrostatic pressure principle, converting liquid depth into reliable industrial data while completely isolating its sensitive electronics. By moving away from thin metal foils, its thick-film ceramic sensor face provides reliable stability even when directly exposed to dense municipal sludge.
Application-Specific Configurations
To maximize performance in different media consistencies, the SLS300B features customized mechanical profiles:
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Model 300B-1 (Dedicated for Sewage): The classic configuration for standard wastewater pumping systems and municipal treatment basins.
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Model 300B-2 & 300B-3 (Sediment & Sludge Specific): Built with open, wide-intake ports to prevent high-viscosity solids, sand, and thick treatment sludge from packing into the sensor cavity and causing false readings.
Features
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Abrasive-Resistant Ceramic Core: The ultra-hard Al203 face prevents physical punctures and micro-scratching from suspended grit, extending sensor lifespan.
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Non-Clogging Physical Profiles: Open-face geometries eliminate internal corners where mud, grease, or ragging material could collect and clog the probe.
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IEC Level-4 Electrical Hardening: Suppresses sudden voltage spikes caused by lightning strikes on outdoor sewage ponds.
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Flexible Structural Cabling: Heavy-duty PUR cables provide reliable chemical isolation, keeping water tightness secure during long-term submersion.
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Low-Power Telemetry Options: Supports low-consumption digital interfaces (I2C / RS485), making it perfectly suited for solar-powered remote environmental stations.
Specification
| Parameter | Technical Specification |
| Measuring Range |
0–3 m up to 100 mH2O (Gauge pressure standard) |
| Overload Limit |
Scaled safely up to 200% FS depending on the selected base range |
| Diaphragm Material |
High-grade Al203 Ceramic (Aluminum Oxide) |
| Shell Material |
316L Stainless Steel standard (304SS optional) |
| Cable Jacket Options |
Heavy-duty Polyurethane (PUR standard), Polyethylene (PE), or PTFE |
| System Accuracy |
±0.5% FS standard (High-precision ±0.25% or ±0.1% FS optional) |
| Lightning Protection |
Fully compliant with international IEC 61000-4-5 Level-4 standards |
| Signal Outputs |
2-wire 4–20mA / 3-wire 0–10V, 0–5V / Digital RS485 Modbus or I2C |
| Operating Temperature |
Standard: -20 to 85 degrees C (Extended option: -40 to 125 degrees C) |
| Protection Rating |
IP68 (Submersible hermetic process seal) |
FAQ
Q: Why is a ceramic diaphragm better than stainless steel for sewage monitoring?
A: Raw sewage contains a volatile mix of chemical complexes, heavy sand, and grit. While stainless steel (like 316L) can pit over time from chemical exposure or warp when hit by large debris, high-grade Al203 ceramics are completely immune to chemical rusting and are structurally hard enough to resist scratching or denting from abrasive sediments.
Q: What extra steps should be taken if installing in highly turbulent mixing basins?
A: For areas experiencing heavy fluid motion or rapid pumping currents, it is highly recommended to mount the sensor inside an open-ended anti-wave guide pipe or secure it to a damping weight. This limits kinetic pressure impacts and protects the physical line from swinging violently against basin walls.
Q: Can this sensor handle acidic or alkaline chemical wastewater?
A: Yes. The ceramic sensor core possesses exceptional chemical compatibility. For heavy chemical configurations, simply pair the standard 316L steel body and PUR cable with an upgraded chemical-inert PTFE cable jacket during ordering to guarantee total system protection.
