HP / Agilent 7694 Headspace Sampler G1289B
The 7694 Headspace Sampler provides an automated method to run up to 44 samples consecutively without operator attention. It is compatible with HP 5890 series GCs and Agilent 6890 series GCs. The sampler’s microprocessor optimizes the time spent for each run according to the values programmed in by the operator. Up to four different methods can be stored and used to analyze a series of samples.
The unit is made up of the, the oven and heated zones, the oven contains a circular aluminum sample carousel that can hold up to six 10- or 20 ml sample vials. There are three heated zones. They are the vial oven, the loop, and the transfer line.
The vial oven is where the vial is heated during thermal and chemical stabilization. Setpoint temperature range is between 40 and 200°C. At this point, the needle has not pierced the septum. The loop zone is controlling the temperature of the upper chamber, the valve, and the sample loop. The setpoint range of the loop is between 50 and 200°C. It is recommended that the loop temperature is kept 15°C higher than the vial temperature for most operations.
The 44–sample vial tray is located on top of the unit to the left of the oven. The tray is constructed of a flexible belt with dividers for each vial compartment. Tray rotation is controlled via the keypad to assist filling the tray with headspace vials. The tray can move forward and backward. A robotic arm moves samples from the vial tray into the oven and back.
Vials are lifted from the tray, carried across the unit until centered above a port in the oven, and then dropped into place. The rail supporting the robotic arm swings away to allow access to the oven.
Used. Good condition.
- HP / Agilent 7694 (G1289B) unit
- Sample transfer line
- Power cable
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