Multiple Spot Temperature Sensors
TL;DR — Quick Summary
Multiple spot temperature sensors (also known as multipoint temperature sensors) measure temperature at several locations along a single probe. This provides a detailed temperature profile within tanks, vessels, or other systems, enabling better monitoring and control. These sensors often use Pt100 RTDs along a flexible stainless-steel hose, can have up to 64 measurement points, and are custom-built to suit the application.
What Is a Multipoint Temperature Sensor?
A multipoint temperature sensor measures temperature at multiple points within the same area or system. Unlike single-point sensors, which give data for only one location, these sensors collect readings from various points simultaneously.
This allows operators to:
- Detect temperature gradients
- Monitor distribution patterns
- Spot anomalies across different depths or positions
Improve process efficiency and product quality
What Is Multiple Spot Temperature?
Multiple spot temperature measurement means taking readings from several fixed locations within the same system. This provides a temperature profile, rather than a single value, enabling a clearer picture of what’s happening throughout a process or container.
Example: In a liquid storage tank, a multiple spot sensor can reveal if the top layer is warmer than the bottom, which could indicate mixing issues or heat loss.
Multiple Spot Sensor Design
At Peak Sensors, our multiple spot temperature sensors are custom-designed for each application. Typical features include:
- Sensing Elements: High-accuracy Pt100 RTDs (Resistance Temperature Detectors), conforming to IEC 751 standards.
- Probe Construction: RTDs positioned along a gas-tight 316 stainless steel flexible hose, often up to 50 metres long or more.
- Mounting Options: Top support via threaded fitting or flange, both with adjustable height control.
- Protection: Can be installed in a secondary sleeve for demanding environments.
- Connection: Usually in a 3-wire arrangement to reduce lead resistance effects.
Performance Options:
- Standard Accuracy: Class B RTDs
- High Accuracy: Higher-grade elements available upon request
- Calibration: Optional individual point calibration for enhanced precision
Measuring Capacity
- Typical Number of Points: Up to 20 sensing locations
- Custom Builds: We have supplied units with 64 discrete sensing points — and more is possible if required.
- Temperature Range:
- Standard: up to 250°C
- Special Versions: up to 500°C
- Economy Models: up to 100°C
Applications
Multiple spot temperature sensors are ideal for:
- Liquid storage tanks (oil, water, chemicals)
- Industrial process vessels
- Environmental monitoring in large chambers
- Thermal profiling in reactors or kilns
- Energy storage systems (e.g., molten salts, phase-change materials)
By mapping temperatures at different depths or positions, engineers can identify inefficiencies, safety risks, or quality issues before they escalate.
Frequently Asked Questions (FAQ)
What’s the difference between a multipoint and a single-point sensor?
Multipoint sensors measure at multiple locations along a single probe, while single-point sensors only measure in one place.
Can these sensors be used in high-pressure environments?
Yes — with the right design and protective sleeve, they can operate in demanding industrial settings.
How many sensing points can I have?
Standard designs offer up to 20, but we’ve built versions with 64 points and can accommodate more.
Do all points need calibration?
Not always, but calibrating each point can improve accuracy in critical applications.
Are they only for liquids?
No — they can also be used for gases and solids, provided the design is adapted accordingly.
View Our Resistance Thermometers
Contact Us
Any inquiries should be directed to our Head office in Chesterfield, UK. Please give us a call on 0146 261999 or contact us by email. We can discuss your application and agree on a specification.