Rotronic

Precision Measurement of Humidity, Temperature and CO₂

Reliable data for process control, quality assurance and environmental monitoring

For industries where climate and moisture control define product quality, accurate measurement is critical.

Rotronic, part of the Process Sensing Technologies (PST) Group, develops and manufactures high-precision humidity, temperature, and CO₂ instruments that deliver reliable data — helping you ensure consistent product quality, regulatory compliance, and process efficiency.

About Rotronic

Founded in Switzerland in 1965, Rotronic has become a global leader in humidity and temperature measurement, known for Swiss precision engineering and robust sensor technology.

The company’s product range spans probes, transmitters, loggers, calibration systems, and complete monitoring solutions.

With scalable integration for industrial automation and digital platforms, Rotronic instruments provide continuous, traceable and auditable data across demanding industries such as pharma, food, energy, cleanrooms, and process manufacturing.

Today, Rotronic is part of the DwyerOmega group.

How do you protect 800 years of history?

Discover how the Danish National Archives uses Rotronic humidity and temperature monitoring to preserve millions of physical documents in a 20,000 m² high-security facility. A precise and fully digital setup ensures stable climate conditions—down to the last degree and percentage.

[Read the full story →]

Relative Humidity calculation

If you need a conversion tool for humidity in air, Rotronic has a calculation table available for you here >>

Dew Point Calculation

If you need a dew point conversion tool, Rotronic has a calculation table available for you here >>

Core Product Families

1. HygroFlex HF-Series Transmitters

Rotronic’s industrial standard for humidity and temperature control.

Available in wall-, duct-, and remote-mount versions, these transmitters offer high accuracy, digital signal stability, and robust build quality for harsh environments.

Applications: HVAC monitoring, cleanrooms, process drying, data centers, and energy systems.

Key Features:

Accuracy up to ±0.8 %RH and ±0.1 °C
Output options: analog (4–20 mA / 0–10 V) or digital (Modbus, Ethernet)
Interchangeable probes with integrated calibration data

2. HygroLab Laboratory Analyzer

A benchtop humidity and temperature reference system for calibration laboratories, R&D, and quality control.

With its intuitive touch-screen interface and multi-probe capability, HygroLab delivers simultaneous high-precision measurements for up to four probes — supporting ISO 17025-traceable calibration.

3. RMS – Rotronic Monitoring System

A modular, cloud-based monitoring platform for humidity, temperature, differential pressure, and CO₂.

RMS integrates sensors, data loggers, and software into one validated system — ideal for GxP-regulated industries and environmental monitoring.

Benefits:

21 CFR Part 11 and Annex 11 compliant
Secure data storage with real-time alarms
Flexible dashboards and reporting tools

4. CO₂ and Differential Pressure Measurement

Rotronic also provides CO₂ transmitters (Rotronic CO2 / HygroClip2 series) and differential pressure sensors for complete climate control in cleanrooms, labs, and industrial environments.

Why It Matters

Accurate humidity and temperature control is not just a technical specification — it’s the foundation of product quality, safety, and compliance. Rotronic sensors and systems give you:

Trusted accuracy and stability even under harsh conditions
Traceable, audit-ready data for compliance and validation
Simple integration into automation, control, and cloud platforms
Reduced downtime through interchangeable probes and remote calibration

In short — you get reliable data and lower total cost of ownership.

Industries and Applications

Pharmaceutical & Biotechnology – GMP-compliant environmental control
Food & Beverage – Hygienic process and storage monitoring
Energy & HVAC – Building efficiency and equipment protection
Cleanroom & Laboratory – Calibration, validation and continuous monitoring
Industrial Manufacturing – Humidity and temperature control in production lines

Want to know more about our solutions from Rotronic?

Emil Larsen

+45 31 44 26 56

Contact me

Products in the Rotronic Portfolio

MD-Series Gas Dryers

Perma Pure MD-Series Nafion™ gas dryers remove water vapor without affecting gas composition — ideal for CEMS, biogas, laboratory and medical applications.

Find out how the ProCeas meet your needs