New Antibiotic Zone Reader & Peni Cylinder Dispenser Videos

New videos are available for the TRINITY V3 Antibiotic Zone Reader and the Peni Cylinder Dispenser. Select below to view.

TRINITY V3 Antibiotic Zone Reader with USP/EP/BP/JP calculations (2 mins):





Peni Cylinder Dispenser & Peni Cylinders (1min):








USP 81 Training Presentation

Giles Scientific has a free USP <81> Training PowerPoint available on request. The presentation is an overview of the background & procedure for the cylinder plate microbial assay of antibiotics. 


USP 81 Procedure
USP 81 Design

 To request the training presentation, email usp81@boun.cr

Antibiotic Zone Reader


The TRINITY V3 Microbiology System automates antibiotic potency zone reading and calculations for USP 81, CFR, AOAC, EP, BP, and JP cylinder-plate assays utilizing color digital imaging technology.  TRINITY V3 is designed, manufactured, and supported by Giles Scientific Inc based in Santa Barbara, California, USA.


TRINITY V3 electronically documents test results and plate images, eliminates calculation errors, and provides significant labor savings compared to manual reading and calculations.  TRINITY V3 strictly complies with 21 CFR Part 11 electronic signature requirements.  TRINITY V3 requires no routine maintenance; it contains no motors or moving parts, only solid state digital electronics.

Giles Scientific also provides peni cylinders and peni cylinder dispensers designed and manufactured in the USA. 


Antibiotic Assay Types

TRINITY V3 automates cylinder plate assays following USP, EP, BP, and JP methods. 

TRINITY V3 interprets zones and calculates potency for: Amphotericin B, Bacitracin, Bleomycin, Carbenicillin, Cloxacillin, Colistemethate, Colistin, Dihydrostreptomycin, Erythromycin, Gentamicin, Nafcillin, Natamycin, Neomycin, Novobiocin, Nystatin, Paromomycin, Penicillin G, Polymyxin B, Sisomicin, and Vancomycin