Sigma-Tek 3-1/8 Dg 4000B 22 White Display

The Sigma-Tek 4000B-22 is an air-driven directional gyro from the 4000B standard directional gyro series. Part number 1U262-002-32 identifies the white-display configuration with white aircraft and index markers, a white dial at 30° intervals, and lettering at 90° intervals.

The instrument uses a heading selector knob to set the indicated heading. Its vertical dial rotates with aircraft turns to provide directional reference information.

• Manufacturer: Sigma-Tek
• Model: 4000B-22
• Manufacturer part number: 1U262-002-32
• Air-driven directional gyro
• White display markings
• Lighted configuration
• No heading-reference bug
• Manufacturer-published maximum dimensions for the 4000B series: approximately 83 mm high × 86 mm wide × 170 mm deep
• Manufacturer-published maximum weight for the 4000B series: approximately 1.1 kg

Installation note: Sigma-Tek states that lighted instruments are supplied without a lamp tray; the appropriate lamp tray voltage must be specified separately. Confirm part number, lighting arrangement, installation data and applicable airworthiness requirements before purchase or installation.

Documentation: Sigma-Tek provides 4000B-series installation information and technical documentation through its technical-information service.