AUTOSAMPLERS

The “Zero Blank” autosampler developed by Costech, uses a “sealed carousel” design. All samples are purged simultaneously with helium in an enclosed chamber. This eliminates any nitrogen background (from atmosphere) which is introduced in the open carousel sampler when it moves to drop the sample into the reactor.

The microstepper motor which drives the autosampler can switch from a 50 position carousel to a 32 position carousel for large or bulky samples.

The autosampler controls (set in the ECS software) are: manual advance, carousel selection (50 or 32 position), and “jog”, which is used to initially align the carousel.

“Isolation Valve”

An optional valve to minimize system changes is available. It replaces the standard drop tube and is the same length. The carrier gas connection is below the valve and a separate purge connection is provided above thevalve. When opening the carousel to add samples, turn the valve, thus isolating the entire carousel section. The carrier gas will continue to flow through the rest of the analytical circuit. After adding samples to the carousel, close the lid, turn on the purge flow and let the carousel purge for 2-5 minutes. Close the purge vent, turn off the purge flow, and open the isolation valve.

 

High Throughput Pneumatic Autosampler

Our 150 position pneumatic autosampler has carousels (three) which are open to atmosphere, and samples can be added continuously while running. The sample holes in the carousels are 11.5 mm in diameter and can accommodate samples like glass fiber filters or large, bulky samples. A large viewing port allows you to clearly see the sample combustion during the analysis.

Autosampler For Liquids

This autosampler is designed for the analysis of liquid samples. The rotating tray can house up to 110 vials of different volumes. Filling by interchangeable trays with different capacities. Trays can either be fixed or rotating type, positioned at right or left hand side.
Moreover, a wide selection of different syringes from 1 to 75 microliters can be utilized.
The AS 300 can work in many different modes: wash with sample and/or with solvent, pumping to eliminate air bubbles, aspiration and injection speed controlled. The autosampler can use four different solvents located in four vials of good capacity for the syringe wash. A bigger vial is dedicated to waste.
The instrument can be controlled by PC via the RS 232 interface, or through the keyboard on the front.