STN Temperature, Humidity, and Dew Point Solutions for Quality and Compliance
Introduction
In the pharmaceutical industry, maintaining controlled environmental conditions is not only a matter of product quality, but it’s a regulatory requirement. Temperature, humidity, and air quality directly influence the stability, efficacy, and safety of drug substances and finished products.
From cleanroom environments and tablet coating rooms to lyophilization and packaging lines, accurate and stable measurement is essential for process control and data integrity.
STN Instruments provides a full range of temperature probes, transmitters, relative humidity transmitters, and dew-point transmitters engineered to meet GMP, GLP, and ISO/IEC 17025 standards.
Temperature Probes — Foundation of Reliable Process Control
STN’s precision temperature probes use high-stability platinum resistance sensors (Pt100 / Pt1000) with low-drift design for consistent accuracy over time.
- Measurement Range: -90 °C to +400 °C (application dependent)
- Accuracy: 1/10 Class B, Class A
- Configurations: sanitary, threaded, immersion, and surface-mount types
- Material: 316L stainless steel for pharmaceutical-grade hygiene
These probes ensure precise temperature control for reactors, incubators, dryers, and autoclaves, supporting consistent batch quality and reproducible results.
Temperature Transmitters — Stable and Traceable Signal Conversion
STN’s temperature transmitters convert probe signals into 4–20 mA or HART Protocol, ensuring stable and interference-free data transmission across control systems.
Key features include:
- High-accuracy signal conditioning with linearization
- 4000 V surge protection and EMC compliance
- Programmable output via USB or HART interface
- IP65 / IP67 protection for cleanroom or plant installations
Used in conjunction with automation systems, these transmitters help achieve tight process control and continuous documentation required by FDA 21 CFR Part 11 and EU Annex 11.
Relative Humidity Transmitters — Controlling Critical Environments
Humidity affects powder drying, coating, packaging, and storage. STN’s RH transmitters utilize precision capacitive sensors with excellent repeatability and fast response time.
- Humidity Range: 0–100 %RH
- Accuracy: ±2 %RH
- Temperature Accuracy: ±0.2 °C
- Output: 2-wire 4–20 mA
Available in wall-mounted or duct-mounted models, these transmitters help maintain consistent environmental conditions in production areas, warehouses, and cleanrooms — ensuring compliance with USP <1079> and WHO GMP guidelines.
Dew Point Transmitters — Moisture Monitoring for Compressed Air and Gas
Moisture in compressed air and process gases can lead to contamination or degradation of pharmaceutical materials. STN’s dew-point transmitters provide early detection and control of humidity in gas systems.
- Measurement Range: -80 °C to +20 °C Tdp
- Accuracy: ±2 °C Tdp typical
- Applications: compressed air, nitrogen, clean gas pipelines, freeze dryers
By integrating dew-point monitoring, pharmaceutical plants can protect critical equipment, maintain drying efficiency, and ensure the purity of gas supplies used in production.
Compliance, Validation, and Calibration Support
Every STN transmitter and probe can be supplied with ISO/IEC 17025-traceable calibration certificates, ensuring data integrity for GMP validation and audit readiness.
With stable long-term performance and low recalibration frequency, STN instruments support continuous quality assurance (QA/QC) and minimize downtime in validated environments.
Conclusion
From temperature-critical reactors to humidity-controlled cleanrooms and moisture-sensitive drying processes, STN’s environmental measurement solutions provide the accuracy, stability, and compliance needed for modern pharmaceutical production.
STN Instruments — Reliable Measurement for a Trusted World.
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