PSS100 Suspended Solids/ TSS/ MLSS Meter for Industrial/Environmental/Wastewater Treatment
Introduction
The PSS100 is an online optical suspended solids analyzer based on infrared scattered light measurement in accordance with ISO 7027 principles. It converts particle-induced light scattering into electrical signals proportional to suspended solids concentration.
This model is positioned as a foundational SS measurement solution within automated water and wastewater systems. It delivers stable data output for monitoring and basic process control while maintaining a simplified system architecture that reduces operational and maintenance burden.
The PSS100 integrates smoothly with PLC, DCS, and SCADA systems through standard analog and digital interfaces, supporting consistent solids tracking across treatment stages.
Working principle
The PSS100 total suspended solid meter measures suspended solids using a near-infrared optical scattering method, which minimizes interference from water color and ambient light. Here is how a total suspended solid meter works:
Step 1: Infrared Emission
An infrared light source is projected into the process liquid.
Step 2: Particle Scattering
Suspended particles scatter the emitted light at specific angles depending on their concentration.
Step 3: Signal Detection and Conversion
The scattered light is detected by optical sensors and converted into an electrical signal proportional to TSS or MLSS concentration.
Step 4: Real-Time Output
The processed signal is transmitted via analog or digital outputs for continuous monitoring. This method provides repeatable and stable readings, particularly suitable for long-term online measurement in treatment processes.
Key features
Designed with practicality in mind, the PSS100 focuses on essential functionality without unnecessary complexity:
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ISO 7027 Infrared Optical Measurement: Reliable suspended solids detection with reduced sensitivity to water color.
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Stable Online Monitoring: Supports continuous measurement of TSS and MLSS in treatment systems.
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Compact and Industrial-Ready Design: Suitable for fixed installation in treatment plants and industrial environments.
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Standard Signal Outputs: 4–20 mA analog output and RS485 (Modbus RTU) enable easy integration into automation systems.
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Clear Local Display: Real-time readings and parameter access via LCD interface.
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Flexible Power Supply Options: Compatible with common industrial power configurations.
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Low Operational Complexity: Straightforward configuration and routine maintenance requirements.
Specification
| Product | Suspended Solids/ TSS/ MLSS Meter |
| Model | PSS100 |
| Measure range | 0.1 ~ 20000 mg/L; 0.1 ~ 45000 mg/L; 0.1 ~ 120000 mg/L |
| Indication resolution | Less than ± 5% of the measured value |
| Pressure range | ≤0.4MPa |
| Flow velocity | ≤2.5m/s、8.2ft/s |
| Storage Temperature | -15~65℃ |
| Operating temp | 0~50℃ |
| Calibration | Sample Calibration, Slope Calibration |
| Cable length | Standard 10-Meter Cable, Max Length: 100 Meters |
| High voltage baffle | Aviation Connector, Cable Connector |
| Main materials | Main Body:SUS316L (Ordinary Version), |
| Titanium Alloy (Seawater Version) | |
| Upper and Lower Cover: PVC; Cable: PVC | |
| Ingress protection | IP68(sensor) |
| Power Supply | AC220V±10%,5W Max,50Hz/60Hz |
Applications
The PSS100 is best suited for standard suspended solids monitoring tasks where stable data and operational simplicity are prioritized:
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Municipal Wastewater Treatment: MLSS monitoring in aeration tanks and biological treatment processes.
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Industrial Wastewater Systems: TSS tracking in effluent streams for compliance and process visibility.
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Pre-Treatment and Primary Treatment Stages: Monitoring solids fluctuations before advanced treatment units.
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Process Water Management: Suspended solids control in industrial recycling or reuse systems.
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Basic Automation Integration: Providing solids data for alarm functions or trend monitoring within PLC or SCADA platforms.
