For determining the acid-soluble proportion of metals in sewage sludges, sediments and soils with aqua regia, e.g. in accordance with DIN 38414/German standard method.

Digestion in aluminium heating block with precise temperature control.
Racks and frame coated with special acid-resistant paint.

Tried and tested C. Gerhardt technology, with temperature/time control and motorised multi-level console for automatically raising and lowering the sample frame and water condenser.

Available with various fittings.

Reproducible digestion conditions

Programmable, precisely controlled temperature/time phases enable secure and reproducible digestion conditions.

Up to 9 temperature/time programs with up to 10 temperature levels can be defined precisely, saved and retrieved again.

Large number of samples in small area

Depending on the block system, 8 or 20 samples can digested simultaneously in 250 ml tubes.

A 20-unit heavy metal digestion unit with a lift has a footprint of only 47 x 53 cm.

Convenient and safe

The precise temperature/time control ensures a secure digestion process.

The motorised multi-level console enables convenient and safe lifting and lowering of the loaded insert rack.

The extraction unit and water jet pump provided or the powerful (optional) TURBOSOG fume suction station ensure effective extraction of acid fumes. TURBOSOG and the cooling water valve for optional water drainage can be switched on automatically.


Order data

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Dimensions (W x D x H)

415 x 415 x 1000 mm (8-unit, without lift)
470 x 415 x 1000 mm (8-unit, with lift)
470 x 530 x 1000 mm (20-unit, with lift)


29/32 kg (8-unit, without/with lift)
46 kg (20-unit, with lift)

Scope of delivery

KJELDATHERM digestion block
Insert rack for digestion tubes
Insert rack for water condenser
Multi-level console
Water condenser
Heavy metal condensation traps
Digestion tubes
Tubing set
Cooling water lines
Drip tray
PVC exhaust manifold
Water jet pump
Electronic controller
Operating manual