Inside the Duet with the RH Systems Team

Introducing the Duet: A New Era of Precision in Chilled Mirror Technology

In the world of precision measurement, "good enough" rarely is. At RH Systems, we’ve spent 25 years pushing the boundaries of what’s possible in humidity and temperature calibration. Today, we are proud to introduce the Duet—the first chilled mirror designed, engineered, and built entirely in-house from the ground up.

The Duet isn’t just an update; it’s a culmination of a quarter-century of legacy and a bold leap into the future. By combining dual-purity measurements into a single, portable unit, we’ve created a system that measures dew point and frost point in perfect harmony.

Ground-Up Innovation: All In-House, All Precision

What sets the Duet apart from every other chilled mirror on the market is its DNA. For the first time, our engineers have custom-designed every single component—from the circuitry and firmware to the user interface and the boards.

• Custom Circuitry: Features a new analog circuit board with a 24-bit ADC for high-resolution temperature and reference resistor measurement.
• Total Control: Equipped with a DAC for precise analog outputs and LTI control.
• Embedded Power: The system runs on Embedded Linux, providing a robust, stable, and modern computing environment.

Faster, Lighter, and More Accurate

We know that in the field or the lab, time is your most valuable resource. The Duet has been optimized for speed without sacrificing the legendary stability RH Systems is known for.

• Rapid Thermal Response: The Duet is significantly faster to cool, faster to heat, and settles into stabilization much quicker than legacy systems.
• Enhanced Portability: We’ve reduced the weight and footprint, making it the most capable portable chilled mirror we’ve ever produced.
• Superior Accuracy: Using ratio-metric comparisons between reference resistors, the Duet achieves temperature measurement accuracy that surpasses our previous industry-leading standards.

Dual Purity: The Power of Harmony

The "Duet" name reflects its core strength: Dual Purity. This means you essentially get two measurements in one device. Whether you are measuring dew point or frost point, the system handles both with seamless transition and high-fidelity accuracy.

For those who require secondary verification, we’ve even built in a second PRT (Platinum Resistance Thermometer) port. This allows you to use your own thermometer to validate the Duet’s readings in real-time, giving you total confidence in your data.

Built for the Future, Rooted in Reliability

If you’ve used our legacy products, you’ll find the Duet’s interface familiar, yet strikingly modern. Because we designed and manufactured every part, we can offer better service, better reliability, and faster support than ever before.

"The Duet is the culmination of 25 years of new ideas and 25 years of legacy. It’s familiar, but it’s faster, more stable, and more accurate."

• Bob Hardy, Founder of RH Systems

Why Choose the Duet?

• 24-bit ADC & Ratio-metric Circuitry: Industry-leading temperature measurement precision.
• Dual Purity: Measures dew point and frost point in one integrated system.
• All-In-House Engineering: Custom boards, firmware, and UI for maximum reliability.
• Built-in Validation: Dedicated second PRT port for external thermometer verification.
• Linux-Powered: A modern, stable software backbone for advanced data handling.
• FrostLock™ Technology is a proprietary innovation that addresses a classic challenge in chilled mirror hygrometry: reliably distinguishing between dew (liquid water) and frost (solid ice) on the mirror surface when measuring at temperatures below 0°C. Read more about it on Our Blog.

Experience the Harmony of Precision

The Duet is just the beginning. With its new architecture, there is much more to come in terms of features and capabilities. If you’re looking for a chilled mirror that combines 25 years of expertise with tomorrow’s technology, the Duet is ready for you.

Ready to upgrade your calibration standards?

Contact us at sales@rhs.com to learn more about the Duet or to schedule a demonstration.

You can also reach us on our Contact Page.

RH Systems

1225 W Houston Ave

Gilbert, AZ 85233 USA

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