Additel ADT 878-TPW-KIT is a specialized accessory designed for use with the Additel ADT 878-160 Reference Dry Well. The system enables the automatic realization and maintenance of the triple point of water at 0.01 °C, providing calibration laboratories with a convenient and highly stable temperature reference for precision thermometry.

The triple point of water is one of the most important reference temperatures in contact thermometry. At the triple point, the solid, liquid and vapor phases of pure water coexist in thermodynamic equilibrium. The corresponding temperature is 0.01 °C.

By combining the ADT 878-TPW-KIT with the ADT 878-160, users can integrate this important reference temperature into a modern temperature calibration system.

The system is particularly suitable for laboratories working with high-accuracy platinum resistance thermometers, reference thermometers and other precision temperature sensors.

At europascal, we can assist you in selecting the appropriate Additel temperature calibration equipment and accessories for your application. For regular calibration and metrological traceability of your temperature measuring equipment, europascal also provides a professional Calibration Service.

Your Benefits at a Glance

The Additel ADT 878-TPW-KIT extends the capabilities of the ADT 878-160 Reference Dry Well with a specialized solution for realizing the triple point of water.

Key benefits include:

• Designed for realization of the water triple point
• Reference temperature of 0.01 °C
• Designed for use with the Additel ADT 878-160
• Automatic realization of the triple point
• Automatic maintenance of the triple-point condition
• Suitable for precision thermometry
• Ideal for calibration laboratories
• Suitable for high-accuracy PRT applications
• Convenient alternative for integrating a water triple-point reference into laboratory workflows
• Combination with the highly stable ADT 878-160 Reference Dry Well
• Suitable for demanding temperature calibration applications
• Supports professional reference thermometer verification
• Compact solution for modern temperature laboratories

The Triple Point of Water at 0.01 °C

The triple point of water is a precisely defined thermodynamic state in which ice, liquid water and water vapor coexist in equilibrium.

The corresponding temperature is:

0.01 °C

This makes the triple point of water an important reference temperature in high-precision thermometry.

For calibration laboratories, a stable triple-point reference can be used for checking high-accuracy thermometers and monitoring their stability.

The Additel ADT 878-TPW-KIT provides a practical method for realizing this reference temperature in combination with the ADT 878-160.

Designed for the Additel ADT 878-160

The Additel ADT 878-TPW-KIT is designed specifically for combination with the ADT 878-160 Reference Dry Well.

The ADT 878-160 covers temperatures from −40 °C to 160 °C and provides excellent temperature stability.

When combined with the TPW kit, the reference dry well can be used to support automatic realization and maintenance of the water triple point at 0.01 °C.

This creates an integrated solution in which the ADT 878-160 provides the required thermal environment while the TPW kit provides the specialized setup for the water triple point.

For laboratories already using an ADT 878-160, the TPW kit therefore represents an important extension for high-accuracy thermometry applications.

Automatic Triple-Point Realization

One of the major advantages of the Additel ADT 878-TPW-KIT is its automated approach.

Conventional realization of a water triple point requires carefully controlled thermal conditions.

The combination of the TPW kit and the ADT 878-160 is designed to simplify this process by automatically creating the required thermal conditions and maintaining the triple-point state.

This can reduce manual intervention and make the water triple point easier to integrate into recurring laboratory procedures.

The result is a convenient reference system for laboratories requiring a stable temperature point close to 0 °C.

Ideal for Precision Thermometry

High-accuracy resistance thermometers require more than a conventional temperature source when their long-term stability needs to be evaluated.

A fixed temperature reference provides a defined point that can be used repeatedly.

The Additel ADT 878-TPW-KIT is therefore particularly useful for laboratories working with:

• Platinum resistance thermometers
• Reference PRTs
• Precision resistance thermometers
• Laboratory reference thermometers
• High-accuracy temperature sensors
• Temperature reference standards

The water triple point can be used as a reproducible reference for evaluating the behavior of these thermometers.

Stability Monitoring of Reference Thermometers

Reference thermometers used in calibration laboratories should be monitored regularly to detect changes in their characteristics.

A highly stable reference point such as the triple point of water can be particularly useful for this purpose.

Repeated measurements at 0.01 °C can provide information about whether a reference thermometer has changed since its previous calibration or verification.

The Additel ADT 878-TPW-KIT can therefore become part of a laboratory’s intermediate-check strategy for high-accuracy temperature sensors.

The exact procedure and acceptance criteria should always be defined according to the laboratory’s quality system, calibration procedure and required measurement uncertainty.

Applications in Calibration Laboratories

The Additel ADT 878-TPW-KIT is particularly suitable for professional temperature calibration laboratories.

Typical applications include:

• Verification of reference PRTs
• Stability monitoring of platinum resistance thermometers
• Precision temperature measurements around 0 °C
• Intermediate checks of reference thermometers
• Comparison measurements
• Temperature calibration research
• Metrological quality assurance
• Reference thermometer monitoring

The system is especially useful where repeatable measurements at a highly stable reference temperature are required.

Combination with the ADT 878 Reference Dry Well Series

The ADT 878 series provides several reference dry wells for different temperature ranges.

The ADT 878-160 covers the low-temperature range from −40 °C to 160 °C and is the model designed for use with the ADT 878-TPW-KIT.

For higher temperatures, additional ADT 878 models are available.

The ADT 878-425 extends the temperature range to 425 °C.

The ADT 878-700 provides calibration capability up to 700 °C and includes functionality for high-quality PRT applications.

For high-temperature thermocouple calibration, the ADT 878-1210 extends the platform up to 1,210 °C.

This enables laboratories to configure a comprehensive temperature calibration system covering a very wide temperature range while using the ADT 878-TPW-KIT for the specialized water triple-point application.

Why Use a Water Triple-Point Reference?

A conventional temperature calibrator generates a controlled temperature that is measured and regulated using its internal reference system.

A triple-point system uses a fundamentally different principle.

At the water triple point, the temperature is determined by the thermodynamic equilibrium between the solid, liquid and vapor phases of pure water.

This provides an exceptionally reproducible reference condition.

For high-accuracy temperature laboratories, this makes the water triple point particularly valuable for checking reference thermometers and detecting changes in sensor characteristics.

The Additel ADT 878-TPW-KIT makes this principle accessible within the ADT 878 temperature calibration platform.

Efficient Laboratory Integration

The combination of the Additel ADT 878-TPW-KIT and ADT 878-160 is designed to simplify integration of a triple-point reference into everyday laboratory work.

Instead of treating the triple point as an entirely separate temperature calibration system, laboratories can use the ADT 878-160 platform as part of the realization process.

This is particularly beneficial for laboratories already using the ADT 878-160 for precision temperature calibration.

The same reference dry well can therefore support conventional comparison calibration over its operating range and specialized triple-point applications with the appropriate accessory.

Technical Overview

ADT 878-TPW-KIT and ADT 878-160

The Additel ADT 878-TPW-KIT should be considered together with the ADT 878-160.

The ADT 878-160 provides the controlled thermal environment, while the TPW kit enables the specialized realization of the water triple point.

Together, the two products provide a solution for laboratories that require both a high-performance reference dry well and access to a stable reference temperature at 0.01 °C.

This combination is particularly interesting for users working with high-accuracy platinum resistance thermometers.

Why Choose the Additel ADT 878-TPW-KIT?

The Additel ADT 878-TPW-KIT provides a specialized solution for laboratories that want to integrate the triple point of water into their precision thermometry workflow.

Its key advantage is the combination with the ADT 878-160 Reference Dry Well.

The system is designed to automate the realization and maintenance of the triple point at 0.01 °C, reducing the manual effort associated with establishing the required thermal conditions.

For laboratories using high-quality PRTs and reference thermometers, this provides an additional reference point for stability monitoring and intermediate checks.

The TPW kit also complements the wider ADT 878 platform, allowing users to combine conventional comparison calibration with a specialized fixed-point application.

At europascal, we can assist you in selecting the appropriate ADT 878 system, inserts, reference thermometers and accessories for your temperature calibration requirements.

For regular calibration and metrological traceability of reference thermometers, temperature sensors and temperature calibration equipment, use the europascal Calibration Service.

Additional measurement and calibration solutions are available through the europascal English homepage.

Discover more products and calibration solutions from europascal.

Manufacturer information about the Additel ADT 878-TPW-KIT is available on the official Additel website.

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