Kjeldahl Digestor (Automated)

Tecator™ Line Digestion Systems – Digestor™ 2508 and 2520

Fully automated digestor for safe and flexible Kjeldahl digestion

FOSS Tecator line Digestion systems allow fully automated digestion for convenient, safe and flexible Kjeldahl analysis.Two way PC communication supports traceability and GLP. Capable of handling eight or twenty tubes.

Samples	Parameters
• Raw materials and finished products in food, feed, agriculture and related matrices • Water & wastewater and a wide range of industrial compounds • Also used in a wide range of industrial applications	• Kjeldahl digestions • Chemical oxygen demand & other reflux chemistries • Trace metal analysis by AAS or ICP instruments • Often used in combination with FIA and SFA systems

System Description

Digestors: All models are delivered with a tube rack with integrated heat shields. They should always be combined with a matching exhaust manifold or reflux head and test tubes – 100 ml, 250 ml or 400 ml volume.
For Kjeldahl digestions the Scrubber 2501 should always be considered for safe and efficient neutralisation of corrosive gases. This replaces the water aspirator, supplied as standard.

Lift models, complete with lift and integrated controller for fully automatic control of digestion applications, including the operation of the lift and a scrubber unit (optional extra). The digestor can be connected to PC for application updates, traceability and logging purposes.
NOTE. An appropriate exhaust manifold or reflux head MUST be added for an automatic system.

Rack models, complete with rack and integrated controller for full control of digestion applications, including the operation of a scrubber (optional extra). The digestion unit can be connected to PC for application updates, traceability and logging purposes.
Can be upgraded to an auto lift system by addition of the lift.
NOTE. An appropriate exhaust manifold or reflux head MUST be added for an automatic system.

Scrubber Unit 2501 (supplied as standard)

Where water is a scarce or expensive commodity, or simply when a higher level of automation is desired, the water aspirator should be replaced with an efficient scrubber unit. Exhaust manifolds and scrubber units which require an external water source are subject to variation in vacuum efficiency due to fluctuations in local water pressure.
The compact bench top Tecator™ Line Scrubber 2501 is self contained and is therefore unaffected by water supply issues. During digestion moist, acidic fumes from the connected exhaust are drawn through the scrubber. Acid vapours are first condensed and diluted in a large acid trap.
Any residual fumes are collected, washed and neutralised before passing through a second small acid trap which protects the vacuum pump in the event that the scrubbing agents are exhausted. The cleaned air is then vented via a tubing outlet. In the interest of GLP and H&S this venting tube should be directed into a fume cupboard. When the scrubber is connected to the lift or rack system the program will fully control the function including switching from high to low aspiration settings.

Technical specification

Performance data at 230 V

Temperature range	Ambient – 440°C
Temperature setting repeatability	1°C
Temperature stability at 100°C	± 2°C
Temperature stability at 400°C	± 1°C
Heating up time 20 to 400 °Cat  230 V	Digestor 2508: ~35 min Digestor 2520: ~40 min
Digestion application memory	Up to 254
Digestion steps per application	Up to 23
Lift connection	Yes, full control
Scrubber	Digestor 2508/2520: Yes, full control
Tubes/batch	Digestor 2508: 8 tubes Digestor 2520: 20 tubes
Installation requirements	Digestor 2508	Digestor 2520
Power supply	200-240 V, 50-60 Hz	200-240 V, 50-60 Hz
Power consumption	1100 W	2300 W
Weight net	10 kg	18 kg
Dimensions (W x D x H)	300 × 390 × 140 mm	300 × 550 × 140 mm
Water supply	EM 2508 Exhaust Manifold: 3 -5 l/min for 5 minutes, then 1 l/min	EM 2520 Exhaust Manifold: 10 – 12 l/min for 5 minutes, then 3-5 l/min
Ventilation requirement	Exhaust system and Fume hood