Designing a calibration device for clinical ear thermometers by David Vidaña Zavala

Designing a calibration device for clinical ear thermometers

David Vidaña Zavala

Industrial Designer

3D Modeler

Prototyper

Affinity Designer

Fusion 360

Dauik 22 is a calibration device designed specifically for ear thermometers used in lab settings, aiming to guarantee precise and accurate temperature readings.

Timeline:

November 2022 - April 2023 (6 months)

Responsibilities:

I was a Design Engineer in the product development team of APR Devices

Client:

Kapter (https://www.kapter.mx/)

Problem:

Designing the Hardware and the Digital Interface.

This project was designed based on the clients request, they wanted a new equipment that would enable them to explore innovative methods of calibrating ear thermometers, with a particular focus on reimagining the design of the blackbody component, which serves as the calibration reference.

In addition to meeting these technical requirements, we were faced with the challenge of developing a fresh visual language for the equipment. Also, we were entrusted with the task of designing an intuitive digital interface, ensuring a seamless and user-friendly experience for operators.

Client past designs

With a thorough understanding of user requirements, we proceeded to the design phase.

Collaborating closely with our stakeholders, we developed prototypes that underwent rigorous testing and iteration. This iterative process allowed us to refine the device's functionality, ergonomics, and user interface to ensure optimal usability and ease of calibration.

We made significant improvements to the design based on feedback from real users and stakeholders. this feedback allowed us to move from a concept to our first MVP.

From concept to first MVP.

Once the design was finalized, we focused on fabrication, leveraging advanced manufacturing techniques and quality control measures. We ensured that the materials used were durable and reliable.

MVP1 to MVP2

Through a user-centered design approach, we improved the accuracy and reliability of ear thermometers while ensuring an intuitive and user-friendly calibration device.

Our focus on meeting the specific needs of thermal laboratories allowed us to deliver a solution that empowers healthcare professionals to make informed decisions and provide high-quality care.

Solution:

Mastering temperature accuracy: A game-changing device for reliable readings

The design of the device consists of an electronically controlled balckbody element (non-reflective element used as reference for calibration) with an accuracy of +- 0.25°C and a resolution of up to 0.01°C. It can measure temperatures from ambient temperature up to 45°C. Ear thermometers are aimed at the blackbody, and the correct temperature reading can be confirmed.

MVP2 to Final product

The housing design is made of acrylic and the inside has a structure made out of PLA (polylactic acid) plastic using additive manufacturing methods.

To read about the interface design go to: Designing the digital interface and the hardware for a calibration device

Empowering Accuracy

The combination of precise temperature control, user-friendly operation, and sustainable design makes this product a reliable and environmentally conscious solution for accurate calibration of infrared laser thermometers.

Reflections:

Reflections + What I would do differently:

Designing the hardware and the software it’s cool but it’s a lot of work... will do it again though.

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Dauik 22 is a calibration device designed specifically for ear thermometers used in lab settings, aiming to guarantee precise and accurate temperature readings.

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