CEST Combined Extrudate Swell & Temperature Monitor from Celsum Technologies - Instrumentation for die swell and viscous dissipation (shear heating) measurement in capillary extrusion rheometry and extrusion.

Celsum Technologies has combined the CADS optical micrometer and the CIRP Infra-Red Pyrometer, complete with a computer system with especially-written software for collecting, displaying and storing the data. The CADS transmitter and receiver elements are mounted 300 mm apart on a flat mounting plate designed especially to fit the ACER, Eta 2100, BFR 2100 and MiniCER capillary extrusion rheometers, although the system may be used with other rheometers and extruders. The bracket is provided with a mount for a photographic tripod as well as with other mounting holes. The CEST system is designed to be portable so that it may be used, for example, on extrusion lines as well as rheology equipment.

An instrument case houses the conditioning and drive electronics for the optical micrometer and pyrometer, which in turn connects to the computer system. Universal voltage devices ensure that the equipment can function using mains supplies from 110V to 240V AC, with frequencies of 50 to 60 Hz.

The CADS optical micrometer used in CEST uses, rather than a laser, a collimated blue-green light fan derived from a very stable LED source. This confers inherent intrinsic safety whilst giving a level of stability, resolution and repeatabilty much better than many laser micrometers.

Key Specification Features:

Micrometer field of view 30 mm
Transmitter and receiver mounted 300mm apart
Repeatability 0.2 micrometre
Smallest detectable object 5 micrometers
Thickness of measured sample approx 0.1 mm
Maximum scan speed (internal) 2,400 Hz
Maximum speed of reading by computer approx 500 Hz
Pyrometer target size 0.8 mm dia from a range of 5mm
Pyrometer range ambient to 500°C
Runs from 110V to 240V 50/60Hz mains
Conditioning module contains low voltage power supply and interface adaptors
Complete with fully configured computer system
Supplied with 2 photographic tripods and adaptors
Results kept in easy-to-read CSV format files
May be used on a wide range of capillary extrusion rheometers and extrusion lines
Pyrometer and micrometer head may be used together or independently
Software event marker for ease of synchronisation