The Additel ADT 835-150 Portable Calibration Bath is a high performance portable liquid bath designed for precise temperature calibration from −30 °C to 150 °C. This compact calibration bath combines the high accuracy and temperature uniformity of a traditional liquid calibration bath with the flexibility of a portable temperature calibrator. With a display accuracy of ±0.1 °C, stability of ±0.01 °C over 10 minutes and temperature uniformity of ±0.02 °C, the Additel ADT 835-150 is ideal for demanding calibration tasks in laboratories, quality assurance, production environments and mobile applications.

The large 90 × 90 mm bath opening accommodates a wide variety of temperature probes. Unlike a dry well calibrator, users are not restricted to predefined insert hole diameters. Sensors with different diameters, shapes and dimensions can therefore be calibrated with a high degree of flexibility.

The Additel ADT 835-150 is an excellent solution for organizations requiring high accuracy, flexibility and efficient temperature calibration workflows. europascal supports you in selecting suitable temperature calibration equipment and provides professional services for your measuring instruments. Additional information is available from the europascal Calibration Service.

Your Benefits at a Glance

• Temperature range from −30 °C to 150 °C
• High display accuracy of ±0.1 °C
• Temperature stability of ±0.01 °C over 10 minutes
• Excellent temperature uniformity of ±0.02 °C
• External reference measurement accuracy of ±0.05 °C
• Large bath opening of 90 × 90 mm
• Flexible accommodation of different temperature probes
• Fast heating and cooling for efficient calibration procedures
• Advanced dual zone heating technology
• Large 6.5 inch TFT touchscreen
• Simple and intuitive operation
• Data logging and documentation functions
• Intelligent remote control
• Compact design for laboratory and mobile use
• One touch self calibration

Ideal for Demanding Calibration Applications

The Additel ADT 835-150 Portable Calibration Bath was developed for temperature calibrations requiring accuracy, stability and a high degree of flexibility when accommodating different sensor types. Its temperature range from −30 °C to 150 °C makes the instrument particularly suitable for applications requiring calibration points below ambient temperature.

Typical applications include:

• Calibration laboratories
• Quality assurance
• Production facilities
• Research and development
• Pharmaceutical industry
• Process industries
• Energy supply
• Mechanical and plant engineering
• Service and maintenance
• Mobile temperature calibration

A major advantage of a liquid calibration bath is the direct thermal contact between the heat transfer medium and the immersed sensors. The liquid surrounds the temperature probes and supports uniform and stable heat transfer. The working zone is located in the central area of the bath and has been optimized by Additel to provide reproducible temperature conditions.

The Additel ADT 835-150 is therefore suitable for calibrating resistance thermometers, reference thermometers, industrial temperature probes and many other temperature sensors.

Flexible Configuration

The Additel ADT 835-150 provides excellent flexibility for different calibration tasks thanks to its large bath opening. Temperature probes with different diameters and geometries can be accommodated without requiring a dedicated insert for each sensor size.

For demanding comparison calibrations, an external reference can be used. The ADT 835-150 achieves a specified external reference measurement accuracy of ±0.05 °C, whereby the accuracy of the reference probe itself must be considered separately.

Additel also offers an ADT 835PC-150 version. This configuration adds an integrated process calibrator and additional electrical measurement capabilities, allowing the ADT 835 series to be configured according to the specific calibration application.

For calibration tasks at higher temperatures, the Additel ADT 835-250 is also available. While the ADT 835-150 covers temperatures from −30 °C to 150 °C, the ADT 835-250 is designed for temperatures from 33 °C to 250 °C. Users can therefore select the appropriate version according to the required temperature range.

Additional instruments from the manufacturer are available in the Additel product overview at europascal.

Technical Highlights

• Temperature range: −30 °C to 150 °C
• Display accuracy: ±0.1 °C
• Accuracy with external reference: ±0.05 °C
• Temperature stability over 10 minutes: ±0.01 °C
• Temperature uniformity: ±0.02 °C
• Repeatability with internal reference: 0.04 °C
• Repeatability with external reference: 0.01 °C
• Heating time from −30 °C to 23 °C: approx. 18 minutes
• Heating time from 23 °C to 150 °C: approx. 30 minutes
• Cooling time from 150 °C to 23 °C: approx. 45 minutes
• Cooling time from 23 °C to −25 °C: approx. 45 minutes
• Cooling time from 23 °C to −30 °C: approx. 55 minutes
• Typical stabilization time: 10 minutes
• Bath opening: 90 × 90 mm
• Large 6.5 inch TFT touchscreen
• Intelligent control and documentation functions
• Suitable for different sensor sizes and geometries

Technical Specifications

Why Choose the Additel ADT 835-150?

The Additel ADT 835-150 combines the precision of a high quality liquid calibration bath with a compact and portable design. This makes the instrument suitable both for stationary use in calibration laboratories and for demanding on site calibration applications.

A particular advantage is its operating range down to −30 °C. This enables calibration points significantly below ambient temperature. Such capability is useful for testing temperature probes used in industrial processes, quality assurance and research and development applications.

At the same time, the large 90 × 90 mm bath opening accommodates sensors with different sizes and geometries. Compared with dry well calibrators, this can reduce the need for multiple inserts and provides excellent flexibility when frequently changing devices under test.

The ADT 835-150 is also designed for efficient temperature changes. According to the manufacturer, heating from 23 °C to 150 °C takes approximately 30 minutes. Cooling from 23 °C to −25 °C takes approximately 45 minutes, while −30 °C can be reached from 23 °C in approximately 55 minutes. This allows multiple calibration points to be approached efficiently within a single calibration procedure.

With temperature stability of ±0.01 °C over 10 minutes and uniformity of ±0.02 °C, the Additel ADT 835-150 Portable Calibration Bath provides highly uniform conditions for comparison calibrations. When combined with an external reference, measurement performance can be further optimized for demanding calibration tasks.

The large 6.5 inch TFT touchscreen simplifies operation and provides a clear overview of relevant information. Data logging functions, integrated application tools and intelligent remote control capabilities support efficient and traceable calibration workflows.

ADT 835-150 or ADT 835-250?

The Additel ADT 835 series provides two temperature ranges for different calibration requirements.

The Additel ADT 835-150 covers −30 °C to 150 °C and is particularly suitable when calibration points below ambient temperature are required.

For applications at higher temperatures, the Additel ADT 835-250 covers a range from 33 °C to 250 °C.

Both models combine the advantages of a liquid calibration bath with a compact portable design. The appropriate model primarily depends on the required calibration temperature range and the sensors being tested.

Typical Calibration Applications with the Additel ADT 835-150

The Additel ADT 835-150 is suitable for numerous professional temperature metrology applications, particularly comparison calibrations of resistance thermometers, industrial temperature probes and reference sensors.

The large bath opening accommodates different sensor geometries and also supports applications in which several probes need to be tested under comparable thermal conditions. The liquid medium provides good thermal contact between the calibration bath and devices under test.

In calibration laboratories, the ADT 835-150 can be used as a compact alternative to larger stationary liquid baths. For service and maintenance applications, its portable design provides advantages when temperature measuring instruments need to be tested directly at different locations.

The instrument is particularly useful for organizations requiring both positive and negative temperature calibration points. Its range from −30 °C to 150 °C covers numerous typical industrial calibration points using a single calibration bath.

For applications above this temperature range, the Additel ADT 835-250 provides a complementary solution. This model extends the operating range up to 250 °C and creates a practical temperature range structure within the ADT 835 series.

europascal supports you in selecting the appropriate configuration and provides expert assistance for professional temperature calibration equipment. Your measuring instruments can also be inspected and calibrated through the europascal Calibration Service.

Additional information about the product family, available versions and technical features is available on the official Additel ADT 835 product page.

Discover more Additel products here.

Manufacturer information about the Additel ADT 835-150 is available on the official Additel website.

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