Haloes Caliper – Measure the Zone of Inhibition

Making a precise inhibition zone measurement (100 µm resolution) manually can become a challenge. The Haloes Caliper helps to perform this in a simple and precise fashion while avoiding parallax errors in readings. Pharmaceutical and clinical labs involved in inhibition zone measurements benefit from the use of this device. A precision rotating wheel accurately measures inhibition zones while being manually spun. This comes in handy during antibiotic susceptibility testing and antibiotic potency measurements.


High resolution: The Haloes Caliper has a 100 µm resolution. 

No parallax error: The Haloes Caliper’s exclusive screen-lense system avoids missing the ends of the haloes through its unique perpendicular reading technology. 

Clear display of results: Results will be clearly featured in a digital display.

Haloes Caliper - Inhibition Zone Measurement - IUL instruments

Technical data



Magnification:   Factor 2.25
Measuring range:   0-35 mm
Resolution:   0.1 mm
Mains:  100/240 V 50/60 Hz 
Power:   50 W
Dimensions (W x D x H):  27 x 23 x 27 cm / 10.6 x 9.0x 10.6 in 
Weight:   3 kg / 6.6 lb
Power:   40 W







Technical Service

During our business hours, our free telephone support will be glad to assist you in case of any questions. Our Technicians take care of the delivery and installation of original spare parts of the highest quality as well as certified testing, measuring, and control equipment. Our maintenance according to manufacturer specifications includes functional tests, cleaning, accuracy testing with calibration as well as a detailed report. In addition, our maintenance contracts protect your investments and reduce the total cost of ownership.

Detailed information about our support options can be found here.

Logo IUL Instruments S.A.
IUL Instruments S.A.

IUL SA was established in 1987 in Barcelona, Spain. The company's expertise lies in designing and manufacturing automated solutions for microbiology laboratories, and they strive to provide safe, secure, and comfortable solutions that will improve the microbiological quality assurance in the pharmaceutical, food, cosmetics, and research labs industry. IUL best sellers are a gravimetric dilutor, homogenizer, spiral plater for inoculation, automatic colony counter and air sampler. The company is turned towards the international market, as it is exporting 90% of their production and is present in over 100 countries.

More about IUL: https://iul-instruments.com

125 employees
10 locations in europe
32 years of experience
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