Custom-range sensors, MET transmitters and a low-cost DTU+IoT solution — engineered to OEM requirements and running 6 months fault-free in continuous duty.
6 months
fault-free operation
±3%
measurement deviation
8 items
custom OEM package
Background
Our customer is a European OEM that builds sludge drying complete systems for municipal wastewater treatment plants in Germany. At the heart of each system is a decanter centrifuge fed with raw municipal sewage, followed by a water reuse loop.
The OEM needed continuous water quality data at two critical points: the centrifuge inlet (incoming municipal wastewater) and the treated reuse water — data that directly drives flocculant dosing, centrifuge performance and discharge compliance with German standards.
Challenge
German-grade expectations: measurement had to be accurate and stable enough to support real-time process control, not just indication.
Custom measuring ranges: standard off-the-shelf ranges did not match the customer's process windows.
Remote visibility without SCADA cost: the OEM wanted to view on-site data from anywhere, without the budget of a full SCADA/PLC integration.
OEM branding: instruments had to integrate seamlessly into the customer's own complete-system offering.
Solution
Instrumentation
Suspended solids — SMT06 sensor
Transparency — SMT07 sensor
Color — SMT08 sensor
Ammonia nitrogen — SMT14 sensor
COD (UV) — SMT16 sensor
MET300 multi-parameter transmitter + MET200 transmitter for signal integration
Customization & Connectivity
Measuring ranges customized to the customer's process specifications
DTU + IoT platform running on a German SIM card — low-cost remote access to on-site data from anywhere in Europe
Full OEM service: instruments delivered ready for integration into the customer's sludge drying system
Results
6 months continuous fault-free operation
±3% measurement deviation maintained
Real-time flocculation & centrifuge control
The monitoring data gave the customer's process engineers the balance point for sludge flocculation dosing and centrifuge operation, enabling precise real-time process control and helping ensure the treated water consistently meets applicable German standards.
On Site
Photo 1 — Control cabinet with HMI and MET transmitter at the centrifuge inlet of the sludge drying complete systemPhoto 2 — Flange-mounted sensor probe installed on the process tank (transmitter and monitoring point)
What the Customer Said
"The routine monitoring parameters offer excellent value for money. There are also many interesting products — such as the transparency sensor — and custom requirements can be implemented very quickly." — Engineering team of the OEM customer, Germany (translated)
Products Used
Model
Product
Role in This Project
SMT06
Suspended Solids Sensor
Sludge concentration monitoring at centrifuge inlet / reuse water
SMT07
Transparency Sensor
Sludge transparency — key index for flocculation balance
SMT08
Color Sensor
Effluent color monitoring
SMT14
Ammonia Nitrogen Sensor
NH₃-N monitoring for discharge compliance
SMT16
COD (UV) Sensor
Organic load (COD) trending
MET300
Multi-Parameter Transmitter
Central signal aggregation and display
MET200
Transmitter
Secondary measurement point integration
DTU + IoT
Data Transfer Unit & IoT Platform
Low-cost remote data access via German SIM card
Need a monitoring package for your sludge or wastewater system? OEM / ODM customization, custom measuring ranges and IoT connectivity available.Get a Quote →sales@sinnosci.com
