Quick Answer:The Tullgren Funnel extracts small organisms from soil: the sample sits on a perforated plate under a heating lamp, which drives the organisms down through the funnel into a collecting jar. It has a 170 mm sieve and a 175 mm funnel.
Last updated: 18 October 2026
Key Features
Coarse and fine mesh supplied.
Horizontal support rod and bosshead included.
Sieve 170 mm in diameter and 65 mm deep.
Funnel 175 mm in diameter.
Takes a low-wattage B22D bayonet bulb of 40 watts or less.
Technical Specifications
Specification
Value
Sieve diameter
170 mm
Sieve depth
65 mm
Funnel diameter
175 mm
Lamp
220V heating lamp
Bulb
Low wattage, B22D bayonet (22 mm), 40 W or less
Included
Coarse and fine mesh, horizontal support rod, bosshead
How It Is Used
A soil sample is placed on the perforated plate and the lamp is held above it. Heat from the lamp drives the soil organisms downwards, through the funnel and into the collecting jar, where they can be collected for study.
Frequently Asked Questions
What bulb does the Tullgren Funnel need?
A low-wattage B22D bayonet-fitting bulb, 22 mm in diameter, of 40 watts or less, for its 220V heating lamp.
What comes with the Tullgren Funnel?
Coarse and fine mesh, a horizontal support rod and a bosshead.
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