When choosing a reliable thermometer, two core components determine performance: the temperature probe and the meter. At STN Instruments, our MiraThermo series is engineered around these fundamentals, ensuring long-term accuracy, stability, and interchangeability.
This blog introduces the technology behind MiraThermo and explains why our thermometers consistently achieve higher quality and performance.
1. The Probe: Sensor Technology & Precision Assembly
Every probe consists of two essential elements: the sensor, and the assembly process.
(1) Proven Analog Sensor Technology
There are two mainstream temperature-sensing technologies:
- Traditional analog sensors (resistance-based)
- Recently developed digital sensors
MiraThermo thermometers intentionally use traditional analog sensors, which output resistance values corresponding to temperature. This technology has been proven for more than 100 years, and has evolved into one of the most stable, accurate, and reliable measurement methods used across industrial applications.
We use the industry’s established sensor types:
- NTC thermistor
- Pt100
- Pt1000
These are the same sensor categories trusted in laboratories, industrial plants, food safety, HVAC, and calibration systems.
(2) First-Tier Pt1000 and Pt100 Sensor Manufacturers for Better Interchangeability
To ensure superior quality and long-term consistency, MiraThermo probes use sensors sourced only from top-tier global manufacturers. This guarantees:
- Better interchangeability between probes
- Lower drift over time
- More predictable performance across temperature ranges
- High stability under industrial conditions
(3) Professional probe assembly process
STN maintains extremely strict standards when selecting suppliers. Our probe manufacturing partner has specialized in this niche field for more than 20 years, with a professional engineering team that continuously refines probe designs based on real-world applications and industry feedback.
By combining their highly reliable probe construction with our precision-grade sensors, every MiraThermo probe is built to meet rigorous performance, stability, and durability requirements before it ever reaches a customer.
2. The Meter: High-Resolution Electronics & Calibration
The meter is the “brain” of the thermometer. It measures the probe’s resistance and converts it into temperature readings in °C or °F, shown on the display or output via RS-232.
(1) High-Resolution, Low-Drift Electronics
Each MiraThermo meter is designed with:
- High-resolution ADC (analog-to-digital converters)
- Ultra-low temperature coefficient resistors
- High-stability reference components
These design choices minimize drift, improve accuracy, and ensure stable readings even with environmental changes.
(2) Factory Calibration for Long-Term Stability
Every unit undergoes:
- Multi-point calibration
- Verification across its full operating range
- Traceability to SI units (via NIST)
This ensures dependable performance throughout the product’s lifetime.
3. Interchangeable Platinum Probes for Long-Term Use
One of the advantages of MiraThermo systems is the interchangeable probe design. Users can:
- Replace probes without replacing the entire instrument
- Choose different probe types for different applications
- Keep long-term maintenance costs low
This modular design is especially valuable for laboratories, industrial sites, and food safety operations where probes experience wearing overtime.