The Additel ADT 878-TPW-KIT Triple Point of Water Kit is a precise solution for demanding temperature metrology applications. In combination with the Additel ADT 878-160 Reference Dry Well Calibrator, the system enables automated realization and maintenance of the triple point of water. The triple point of water is an important intrinsic reference point of the International Temperature Scale of 1990 (ITS-90) and is particularly suitable for regular verification of high quality reference PRTs and SPRTs.
The Additel ADT 878-TPW-KIT was specifically developed for use with the ADT 878-160. Additel integrates the required automation directly into the reference calibrator, significantly simplifying realization of the triple point of water. Users insert the triple point of water cell and the corresponding reference probe and then start the designated procedure on the ADT 878-160. The software guides the user through the different realization phases and subsequently supports maintenance of the triple point condition.
The triple point of water is 0.01 °C and is particularly valuable for calibration laboratories that need to regularly monitor high quality reference thermometers for drift. Such intermediate checks can help determine whether the behavior of a reference probe has changed since its last calibration.
At europascal, the Additel ADT 878-TPW-KIT is available together with expert support for selecting suitable reference probes and the appropriate temperature calibration equipment for your laboratory.
Your Benefits at a Glance
- Triple point of water kit for demanding temperature metrology
- Specifically developed for the Additel ADT 878-160
- Automated realization of the triple point of water
- Automated maintenance of the triple point of water
- Triple point of water at 0.01 °C
- Specified uncertainty of less than 0.0005 °C
- Realization time of approximately 20 minutes
- Estimated operating time of approximately 2 hours
- Cell immersion depth of 115 mm
- Cell inside diameter of 8 mm
- Compact triple point of water cell
- Cell made of borosilicate glass
- Recommended thermal fluid: ethanol
- Suitable for verification of high quality reference PRTs
- Suitable for monitoring reference probe drift
- Reference to the International Temperature Scale ITS-90
- Integrated procedure within the ADT 878-160
- No separate large liquid bath required for TPW realization
- Complete accessories for the intended application
- Ideal for reference and calibration laboratories
Ideal for Demanding Temperature Metrology Applications
The Additel ADT 878-TPW-KIT is designed for users with demanding temperature metrology requirements. The triple point of water provides an important reference point for verifying high quality PRTs and SPRTs. Additel describes regular verification at the triple point of water as a method for monitoring the drift of a reference temperature probe and maintaining confidence in its measurement results.
Typical applications include:
- DAkkS accredited calibration laboratories
- Reference calibration laboratories
- Secondary calibration laboratories
- In house calibration laboratories
- Research and development
- Temperature metrology
- Quality assurance
- Manufacturers of high quality temperature probes
- Testing laboratories
- Industrial reference laboratories
- Research institutions
The system is particularly useful for laboratories already using a high quality PRT as a reference. Regular checks at the triple point of water allow the stability of this reference probe to be monitored between regular calibration intervals.
The ADT 878-TPW-KIT therefore provides a valuable complement to regular calibration. For periodic calibration of your temperature measuring equipment, europascal also provides a professional Calibration Service for temperature and other measurement quantities.
Flexible Expansion of the ADT 878-160
The Additel ADT 878-TPW-KIT is not a standalone temperature calibrator. It was developed as a specialized extension for the Additel ADT 878-160 Reference Dry Well Calibrator. The reference dry well calibrator provides controlled temperature generation and guides the user through the automated process.
The Additel ADT 878-160 covers a temperature range from −40 °C to 160 °C and provides excellent stability and uniformity for demanding comparison calibrations. The TPW function is a special capability of this low temperature model within the ADT 878 series. Additel specifies that the optional TPW Kit for automatic realization is supported exclusively by the ADT 878-160.
The combination of the ADT 878-160 and ADT 878-TPW-KIT enables a largely automated procedure. According to the operating instructions, this procedure includes several phases ranging from preparation and freezing to realization, maintenance and the final melting process. The calibrator controls the required temperatures according to the stored procedure.
The ADT 878-160 therefore becomes not only a highly stable temperature source for comparison calibrations but also a compact solution for realization and maintenance of a triple point of water cell.
Technical Highlights
- Triple point of water: 0.01 °C
- Specified uncertainty: < 0.0005 °C
- Automated TPW realization with ADT 878-160
- Automated maintenance of the triple point condition
- Realization time: approx. 20 minutes
- Estimated operating time: approx. 2 hours
- Immersion depth: 115 mm
- Inside diameter: 8 mm
- Cell outside dimensions: 160 mm × 25 mm
- Cell material: borosilicate glass
- Recommended thermal fluid: ethanol
- Suitable for drift monitoring of reference PRTs
- Designed for use with Additel ADT 878-160
- TPW cell included in the kit
- Cell basket included
- Covers included
- Support ring included
- Cell removal tool included
- Bottom cushion included
The specified uncertainty of less than 0.0005 °C refers, according to Additel, to the total uncertainty when using the shake method to realize the cell followed by maintenance in the ADT 878-160.
Technical Specifications
| Feature | Specification |
|---|---|
| Manufacturer | Additel |
| Model | ADT 878-TPW-KIT |
| Device type | Triple Point of Water Kit |
| Application | Realization and maintenance of the triple point of water |
| Reference temperature | 0.01 °C |
| Specified uncertainty | < 0.0005 °C |
| Immersion depth | 115 mm |
| Inside diameter | 8 mm |
| Cell outside dimensions | 160 mm × 25 mm |
| Cell material | Borosilicate glass |
| Realization time | Approx. 20 minutes |
| Estimated operating time | Approx. 2 hours |
| Recommended thermal fluid | Ethanol |
| Compatible calibrator | Additel ADT 878-160 |
| TPW cell | Included |
| Cell basket | Included |
| Covers | Included |
| Support ring | Included |
| Removal tool | Included |
| Bottom cushion | Included |
The technical specifications correspond to the official manufacturer data sheet.
Why Choose the Additel ADT 878-TPW-KIT?
The Additel ADT 878-TPW-KIT provides a convenient method for realizing the triple point of water in combination with the ADT 878-160. Traditional methods require experience and several manual operating steps. Additel has therefore integrated much of the procedure directly into the control system of the reference calibrator.
For calibration laboratories, one of the main benefits is the verification of high quality reference PRTs. During everyday use, a reference probe can be exposed to mechanical and thermal stresses. Over time, these influences can change its characteristics. Regular checks at an intrinsic reference point can help detect such changes.
The triple point of water is particularly suitable for this purpose. Additel describes it as a critical intrinsic standard and an ITS-90 reference point for users of high quality reference PRTs and SPRTs.
Combining the kit with the ADT 878-160 also creates a closed verification workflow. The reference PRT can be checked at the triple point of water and subsequently used for the self calibration function of the ADT 878. Additel describes this concept as a verification loop for temperature calibration equipment.
The ADT 878-TPW-KIT is therefore particularly valuable for laboratories that want to monitor their reference temperature measuring equipment between regular calibrations and identify potential changes as early as possible.
Additel ADT 878-TPW-KIT and ADT 878-160
The Additel ADT 878-TPW-KIT was specifically developed for use with the Additel ADT 878-160 Reference Dry Well Calibrator. This is particularly important when selecting the product because the automatic triple point of water function within the ADT 878 series is supported exclusively by the low temperature ADT 878-160 model.
The ADT 878-160 provides a temperature range from −40 °C to 160 °C. It can therefore initially be used as a high performance reference dry well calibrator for comparison calibrations. Adding the ADT 878-TPW-KIT expands its capabilities to include realization of the triple point of water.
The procedure is largely automated. Once the cell and PRT have been inserted, the designated procedure is started. The firmware controls the required temperature phases and informs the user when the cell has reached the intended condition. The triple point can then be maintained within the reference dry well.
The combination of the ADT 878-160 and ADT 878-TPW-KIT is therefore particularly attractive for calibration laboratories that want to use one compact reference dry well both for conventional comparison calibrations and for verification of high quality reference probes at the triple point of water.
More information about the required base instrument is available on the Additel ADT 878-160 Reference Dry Well Calibrator product page.
Additel ADT 878 Reference Dry Well Series
The ADT 878-TPW-KIT is specifically designed for the ADT 878-160, but europascal also offers additional models from the Additel ADT 878 reference dry well series for higher temperature ranges.
For applications from 33 °C to 425 °C, the Additel ADT 878-425 provides a highly stable reference temperature source with excellent axial and radial temperature uniformity.
For calibration temperatures up to 700 °C, the Additel ADT 878-700 extends the operating range and additionally provides an integrated automatic PRT annealing function.
For high temperature thermocouple calibration up to 1,210 °C, the Additel ADT 878-1210 provides a reference calibration furnace for demanding high temperature applications.
This allows calibration laboratories to combine the ADT 878-160 and TPW-KIT with additional ADT 878 models to cover a wide range of professional temperature calibration applications.
Typical Applications with the Additel ADT 878-TPW-KIT
The Additel ADT 878-TPW-KIT is primarily designed for verification of high quality reference PRTs and SPRTs at the triple point of water. The reference temperature of 0.01 °C provides a defined control point at which the current indication or resistance value of a reference probe can be compared with previous results.
A typical application is drift monitoring of a reference PRT between two regular calibrations. If the probe shows an unexpected change at the triple point of water, this may indicate drift or another change in sensor behavior. The laboratory therefore receives additional information about the condition of its reference measurement equipment.
In combination with the Additel ADT 878-160, realization is significantly simplified. The calibrator automatically supports the process and can subsequently maintain the triple point of water. According to Additel, realization takes approximately 20 minutes and the estimated operating time is approximately two hours.
The Additel ADT 878-TPW-KIT Triple Point of Water Kit is therefore a valuable addition for reference and calibration laboratories that regularly verify their temperature references and require a compact solution for practical work with the triple point of water.
Additional solutions for professional temperature calibration are available from europascal in the Dry Well Calibrators category.
Discover more Additel products here.
Manufacturer information about the Additel ADT 878-TPW-KIT is available in the official Additel ADT 878-TPW-KIT data sheet.
