When it comes to liquid nitrogen storage, cryogenic research, and ultra-low-temperature material preservation, temperature accuracy is not optional, but mission-critical. STN Instruments proudly introduces our Cryogenic Temperature Monitor, a professional-grade system designed specifically for high-precision measurement in LN₂ and other cryogenic environments.
At the core of this system is a platinum Pt100 Class A sensor, assembled using phosphor-copper wire—a combination chosen for its proven performance under extreme thermal and mechanical stress.
**Why Pt100 + Phosphor-Copper Wire?
The Engineering Advantages of STN’s Cryogenic Probe Design**
Cryogenic temperature monitoring poses unique challenges. Rapid temperature swings, mechanical shock, condensation, frost buildup, and thermal contraction can easily damage or destabilize conventional sensor assemblies. STN’s design overcomes these challenges through robust materials and precision assembly.
1. Exceptional Stability in Extreme Cold
Platinum (Pt) has a highly predictable and linear resistance-temperature characteristic, even at -196 °C.
Phosphor-copper wire maintains excellent conductivity and mechanical stability at cryogenic temperatures, ensuring the sensor’s resistance signal is transmitted accurately without drift or brittleness.
2. Superior Mechanical Strength Under Thermal Cycling
Repeated immersion into liquid nitrogen stresses ordinary wires and solder joints.
Phosphor-copper provides:
- High fatigue resistance
- Strong resistance to cracking in ultra-low temperatures
- Excellent flexibility and tensile strength
This helps maintain reliable electrical continuity after hundreds of freeze-thaw cycles.
3. Reduced Signal Noise and Improved Accuracy
Cryogenic environments can introduce electrical noise through static, condensation, or rapid thermal changes.
Phosphor-copper wiring offers:
- Low resistivity for stable signal transmission
- Better shielding reliability
- Good solderability and strong joint integrity
Combined with a Class A Pt100, the system achieves ±0.2 °C cryogenic accuracy.
4. Long-Term Reliability for Critical Applications
Using high-grade materials ensures the probe performs consistently for years, even in demanding applications such as:
- Biobanking and cryogenic tissue storage
- Liquid nitrogen freezers
- Vaccine, cell, or genetic sample repositories
- Cryo-transport systems
- Industrial cryogenic processes
This structure minimizes failure modes like micro-fracture of wires, sensor drift, and poor signal repeatability.
Engineered for Confidence in Every Measurement
STN’s Cryogenic Temperature Monitor combines robust materials, precision engineering, and rigorous calibration practices to deliver dependable temperature performance where it matters most. Every probe is multi-point calibrated and certified traceable to SI units through NIST, ensuring you can trust your readings even in the harshest conditions.
Whether you’re managing long-term cryogenic storage or maintaining regulatory-compliant laboratory environments, STN’s Pt100 + phosphor-copper wire cryogenic design delivers precision, durability, and peace of mind.