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Parameter

Colony Counting

A colony count is the number of bacterial or fungal colonies grown on a Petri dish, used to estimate the microbes in a sample. Hintron colony counters mark each colony with an electronic pen and add it to the count, so every colony is counted once.

Count
0 to 999999
Dish
up to Ø 110 mm
Magnifier
1.7×
Marking
electronic pen
Instruments

Recommended instruments

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Method

How it is counted

01

Place

Set the incubated Petri dish on the lit counting plate and bring the magnifier into focus.

02

Mark

Touch each colony with the electronic pen. It leaves a mark and adds one to the count.

03

Report

Read the total on the 6-digit display and work out colony-forming units from the dilution.

Applications

Where it is used

Related parameters
Questions

Frequently asked

How does the electronic marking pen count?

Each touch of the pen on a colony marks it on the dish and adds one to the count on the 6-digit display. Nothing is counted twice, and the marks show which colonies are done.

What if I count a colony by mistake?

Press the ▼ key under CORRECTION to take one off the count. RESET clears the display for the next dish.

What dish sizes does the counter take?

Petri dishes up to Ø 110 mm. The dish sits on an evenly lit counting plate under a 1.7× magnifier on an adjustable arm.

Application support

Need a colony counter?

Tell us the samples, the dish size and the quantity. A quotation follows.

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