In cleanrooms, labs and modern buildings, you rarely monitor just one variable. You need differential pressure, temperature, humidity, CO₂ and VOCs at minimum, often in ducts and rooms across multiple zones. Traditionally that means multiple single-purpose transmitters, separate wiring, more panel space and more things to validate and maintain.
The FEEL multi-parameter sensor from Stork Solutions is designed to collapse this complexity into a single, modular platform. It lets you select exactly the combination of differential pressure (DP), temperature & humidity, CO₂ and VOC you need, then output all readings via analogue and optional RS-485 Modbus from one compact device.
Below is how that modular design simplifies monitoring in cleanrooms and building automation projects.
1. One platform, up to five parameters
The FEEL system is explicitly designed as a multi-parameter platform. Sensor options include differential pressure, temperature, humidity, CO₂ and VOC. You can configure it to record up to five values simultaneously, with switchable analogue outputs (for example 0–10 V, 4–20 mA) and optional RS-485 Modbus for digital integration.
For cleanroom and building automation designers, this means one physical device per location instead of multiple separate transmitters. This leads to fewer penetration points into walls or ducts and simpler I/O allocation on your BMS, PLC or monitoring system. You effectively deploy a single, configurable node per room or duct, rather than assembling a kit of mismatched sensors.
Core product overview: STT‑28 SDI‑12 Submersible Temperature Transmitter
According to the official product page, the STT-28 SDI-12 Submersible Temperature Transmitter is:
- Designed to be permanently submersed in liquids and suspended by its cable
- Available with stainless steel or marine bronze housings for media compatibility
- Built around a highly accurate NTC thermistor, selected for accuracy and stability, with additional electronic correction for performance
- Offered in two mechanical variants:
- Standard submersible version for long-term trend monitoring where response speed is less critical
- 10 mm thin-walled probe version for very fast thermal response
- Equipped with SDI‑12 digital communications and a selection of standard and bespoke commands
- Fully submersible to IP68, suitable for permanent immersion
- Rescalable and configurable via the USB‑SDI12‑PRO – USB powered SDI‑12 interface and free Stork DCT software, using USB power from a PC or laptop
These design choices are what make it a solid option for long-term underwater work.
2. Integrated differential pressure for cleanroom control
Maintaining pressure cascades between rooms is critical in cleanrooms and containment areas. The FEEL’s differential pressure section is designed with selectable pressure ranges (default: 1, 10, 100, 1000 hPa), and each range can be scaled to 25%, 50%, 75% or 100% of the ordered range. Range adjustment is handled via DIP switches on the device or micro-USB plus free configuration software.
Crucially for long-term stability, there is an auto-zero / tare function. An internal Festo pneumatic solenoid periodically isolates the pressure ports to ensure no pressure is present, then automatically zeroes any offset. The solenoid then reconnects the ports and normal measurement resumes. This happens in the background without user intervention, leading to less manual re-zeroing, fewer site visits and lower maintenance overhead.
3. Combined temperature and humidity for comfort and compliance
Temperature and relative humidity are core parameters in both cleanroom and HVAC / building automation applications. In FEEL, they are handled as a combined digital sensing module with temperature accuracy of ±0.3 K and humidity accuracy of ±2% RH. This is delivered as a single T+RH module to keep cost and complexity down.
Installation options include a room-mount probe that hangs on a wall or a duct-mount probe that interfaces with ducts in air conditioning or exhaust systems. You do not need separate temperature and humidity transmitters per location, and you can choose room or duct sensing from the same product family. One configuration process covers both parameters, simplifying commissioning.
4. CO₂ and VOC for air quality and occupancy insights
Modern building and cleanroom projects increasingly need to go beyond dry parameters like temperature and pressure. CO₂ is used as a proxy for occupancy and ventilation effectiveness, while VOC levels provide insight into off-gassing from materials, solvents and human activity.
The FEEL covers both with an internal CO₂ sensor accessed via a Gore vent filter in the housing, which protects the sensor while allowing accurate diffusion. It also features an integrated VOC sensor for volatile organic compounds, which is increasingly required in building wellness schemes and clean manufacturing areas where solvent use or process emissions are present. Having CO₂ and VOC in the same hardware as DP, temperature and humidity makes air quality metrics part of the same, integrated control strategy.
5. Modular electronics and outputs that suit both BMS and cleanroom SCADA
The FEEL’s electronics are designed to be flexible and field-configurable. It features switchable analogue outputs supporting common ranges such as 0–10 V, 4–20 mA, 2–10 V and 0–20 mA. There is also an optional RS-485 Modbus interface for simple integration into BMS, PLC, SCADA and cleanroom monitoring software.
Parameterisation options include local adjustment via DIP switches or detailed setup via a micro-USB port and configuration software. This simplifies both design and lifecycle, as designers can pick one hardware SKU and configure range and output type during commissioning. Changes in room classification or setpoints can be accommodated by re-configuring the existing sensor rather than replacing hardware.
6. Installation and maintenance benefits in cleanrooms and HVAC
The FEEL’s physical design has several details that help specifically in cleanroom and building installations. It offers wall or duct mounting with straightforward mechanical fixtures and a neat, enclosed housing that is visually acceptable in occupied spaces. An optional TFT display can show multiple values simultaneously for rapid at-a-glance checks by operators or auditors.
The design includes an innovative snap-in mounting frame that allows tool-free replacement of the device. This is ideal when you want to minimise work inside clean areas or when devices need to be swapped quickly without re-doing wall penetrations or conduits. This directly reduces the time and disruption required to install or maintain sensors across a new cleanroom suite or building.
7. How this modular design simplifies real projects
In cleanrooms and controlled environments, you can replace three to five separate transmitters with one device per room. You can set DP ranges and auto-zero behaviour from the front panel or a laptop and stream all values via Modbus into a central monitoring system. This simplifies validation, documentation, alarm management and calibration scheduling.
In building automation and HVAC, the same device can be used to control ventilation via CO₂ and VOC driven strategies, maintain thermal comfort and humidity targets and monitor filter performance via differential pressure. By using the FEEL as a universal air quality and pressure node, you simplify design, procurement and maintenance through common spares and standard procedures.
Summary: why the FEEL sensor is a strong choice
The FEEL multi-parameter sensor simplifies cleanroom and building automation monitoring by combining up to five key parameters in a single device. It provides smart differential pressure measurement with auto-zero, accurate temperature and humidity sensing and integrated CO₂ and VOC monitoring.
With flexible outputs and a design that supports fast installation and easy maintenance, it reduces hardware count, wiring and validation effort. For anyone designing or upgrading cleanrooms, laboratories or smart buildings, FEEL provides a single, modular sensor platform that streamlines both the technical design and the day-to-day operation of environmental monitoring.
