Total Suspended Solids Monitor
TSS Sensor
hIgh resolution Color Display
LIVE
sensor
charting
DATA LOGGING
W/ Micro-SD CARD
multilingual
(english, spanish, etc.)
Whatever level of suspended solids from 2 NTU all the way up to >8% solids, the Chemtrac TSS Monitor is the solution. A sophisticated sensor that ranges up to 8% solids (in wastewater, and up to 50% in other solids), this suspended solids monitor is the solution, and is unique in its ability to measure from low NTU to percent solids in one sensor.
Suitable for wastewater, potable water monitoring, mixed liquor suspended solids monitoring, return activated sludge, centrate monitoring, filtrate monitoring, sludge, and many more applications where a traditional turbidimeter or suspended solids analyzer would be used. The suspended solids sensor can be fitted with an auto-cleaning function that blasts either water or air across the optical windows keeping them clean.
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Overview
Each suspended solids monitor is fitted with a light source and two detectors for making the measurements. Having two detectors, positioned at different distances from the light source, allows the sensor to be used over a wide range of suspended solids concentrations. The light source is a long life infra-red LED emitter (providing for 15 years working life). The detectors are matched photodiodes that are positioned to detect backscattered light, which is light that is scattered by >90°. By measuring back scattered light the sensor can be used to detect low and high concentrations of solids. This configuration allows accurate and reliable measurements of suspended solids concentrations and turbidity to be made.
Calibration of the TSS sensor for turbidity measurements (NTU) or measurements of samples with low concentrations of solids is very easy, requiring a single calibration sample. This sample can either be a reading from another method, or a suitable standard. The analyzer calibrates the sensor by a procedure that reduces the light output through four stages, taking measurements at each. This process provides an accurate and reliable zero and span without the requirement to use a ‘0’ NTU/solids sample.
The calibration of the TSS sensor for the measurement of samples with high concentrations of solids uses a multi-point calibration for the most accurate results. Up to 5 calibration points can be used to give an accurate performance across a wide range of sample concentrations.
The TSS sensor can be mounted on the end of a pole for dip mounting in a channel or tank, or inserted into a pipe via a valve which allows for retraction/removal of the sensor without shutting down the process.
More Benefits
The use of a single sensor to robustly and accurately measure a large dynamic range of suspended solids allows for:
Less spares – more commonality across a single or multiple sites
No requirement to know the range prior to specifying – easier purchasing
One online suspended solids analyzer can be:Online mlss meter
Online tss meter
Online total suspended solids meter
Online effluent monitor
Online inlet monitor
Online ‘in process’ suspended solids analyzer
3D Model View
Videos
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90 Second Intro Video: New Chemtrac LCA5DemonstrationThe “Next Generation” Lab Charge Analyzer. The LCA5, a valuable instrument for the water treatment professional, is used in water treatment plants to determine the target coagulant dosage…
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LCA5 – Routine CleaningTutorialRoutine cleaning is important for accuracy of measurements, minimizing drift, and prolonging the lifespan of the sensor. Use this video to learn how to perform periodic cleaning of…
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Laboratory Charge Analyzer with pH probe and Auto Titrator DemonstrationDemonstrationThe Laboratory Charge Analyzer Model LCA-3 is Chemtrac’s newest model lab unit capable of performing automatic titrations to determine optimum coagulant dosage of a raw water sample. The…
Q & A’s
Specifications
Features
Description
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Range
Up to 500 g/l, 4000 NTU (depending on the optical properties of the sample
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Units
Selectable g/l, mg/l, ppm, ppt, % (suspended solids), or NTU or FNU (turbidity)
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Accuracy
< 2% of measured value or 0.01 g/l or 0.8 NTU (whichever is greater)
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Reproducibility
< 1% of measuring value or 0.001 g/l or 0.8 NTU (whichever is greater)
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Limit of Detection
0.001 g/l or 2.4 NTU
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Resolution
Up to 0.0001 g/L
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Response Time
T90 > 10 sec (adjustable based on averaging
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Drift (electronic)
None
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Averaging
Configurable (10 sec – 10 min)
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Lamp Source
IR LED (860nm)
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Weight
Approx. 1 kg (35 oz.)
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Process Temperature
0-50 C (32-122 F)
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Operating Pressure
10 bar (145 psi) maximum
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IP Rating
IP68
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Mounting Thread (for dip installation)
1” BSP
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Max. Power Consumption
70 mA at 15 VDC
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Cable Length
6m (20 ft) standard (extendable by request)
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Wetted Parts
316 stainless steel, sapphire
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Diameter
38mm (1.49”)
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Length
230mm (9.06”)
HydroACT Features
HA2
HA4
HA8
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Sensor limit*
2
4
8
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Analog output limit*
2
4
8
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Relay limit*
4
8
16
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Digital Input limit*
4
8
16
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Isolated universal I/O
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Nema 4X/IP65
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•
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Wall & panel mount
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Multilingual
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High resolution display
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Graphical trending
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On/Off threshold control
optional
optional
optional
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Advanced control (e.g. PID)
optional
optional
optional
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Color display
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Customizable data logs
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MicroSD card download
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Remote (Internet) access
optional
optional
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PROFIBUS, Modbus
optional
optional
*Sensors, I/O, and relays are all optional and must be specified at time of ordering.
Downloads
| Title | Category | Upload Date | File Size | Download |
|---|---|---|---|---|
HydroAct 4 NTU Sensor Flow Chamber with Flush
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HydroACT Multiparameter Analyzer, Turbidity & TSS Monitor | Dec 11, 2025 | 958 KB | Download |
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Turbidity Sensor Datasheet
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Turbidity & TSS Monitor | Nov 3, 2025 | 729 KB | Download |
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TSS Sensor – Datasheet
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Turbidity & TSS Monitor | Nov 3, 2025 | 616 KB | Download |