3-1/8 UMA VSI 0-4000 FT.

Part# 10-20506
MFR Model# 8-310-40
DescriptionPart No.
3-1/8 UMA Vertical Speed Indicator
Range: 4,000 ft/min.


The vertical speed indicator is a precision instrument which provides an accurate indication of rate of change of altitude. This instrument is temperature compensated and is provided with a zero adjustment screw on the face of the case in the seven oclock position. Power: Static system.

3-1/8" Vertical Speed Indicator (Refer to Image #1)
Case: Valox 420 Plastic
Weight: 8.8 oz.
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WARNING: Cancer and Reproductive Harm -

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Good cheap VSI that we used as a replacement for one in a pitot static test set that had been over pressured.

January 12, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is this UMA vertical speed indicator FAA TSO Approved?

No, this unit is not FAA Approved.

Q: Which fitting size should I use for the part # 10-20505?

The one recommended to use by the manufacturer is AN816-4D.

Q: Does this UMA VSI have backlighting?

No. This is not lighted.

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