What is TruVol?

Standardizing doses has always been a challenge for patch testers. If you are loading your own patch test panels, how much is too much or not enough?
TruVol Precision Allergen Dispenser provides a precise dose of allergen every time it’s used. It’s easy to load, easy to use and easy to be a more successful patch tester!

See TruVol in action:

Watch this short video to see just how easy it is to use TruVol Precision Allergen Dispenser!

TruVol details:
The first device to help provide a standard allergen dose for every chamber, every patient, every time!
Accurately delivers a standardized dose (20μl) per use
Helps save money by eliminating over-filled chambers
Eliminates false negatives due to under-filled chambers

TruVol™ Precision Allergen Dispenser
The TruVol precision allergen dispenser accurately delivers standardized dose (20µL) per dose. This helps save money by eliminating over-filled patch test chambers while patch testing your patients for skin or contact dermatitis.


I found Bio-diagnostics more than helpful, replacing all our allergens in a very quick and efficient way, reducing the complexity of ordering and providing an excellent service to us.

Melanie Paddon, OPD, Circle, Bath.

The company and individual staff are very attentive and efficient at responding to our needs. I would not hesitate in recommending Bio-diagnostics to provide a solution for any potential customers. Thanks Bio-diagnostics.

Martin Davies, Manager Immunology, Prince Philip Hospital, Hywel Dda University Health Board

Brilliant support from very knowledgeable and friendly team. Nothing is ever too much trouble - Thank you!

Pearl Huey, BCULHB Service Manager for Cellular Pathology.

We have been customers of Bio-Diagnostics for over 10 years and have always found their products to be of a high and consistent quality, and customer service to be excellent.