From fa8e0fb8b75a808e029b090747fb60b35debb44a Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Wed, 5 Jun 2019 10:46:57 -0600 Subject: [PATCH] add an explicit reference to Poron open-cell foam in Appendix A --- doc/micropeak.txt | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/doc/micropeak.txt b/doc/micropeak.txt index 3621a2dc..b6dd0ddb 100644 --- a/doc/micropeak.txt +++ b/doc/micropeak.txt @@ -327,10 +327,16 @@ Keith Packard ; Bdale Garbee sensor out of direct sunlight. The barometric sensor sampling ports must be able to - "breathe", both by not being covered by foam or tape or other - materials that might directly block the hole on the top of the - sensor, and also by having a suitable static vent to outside - air. + "breathe", both by not being covered by solid foam or tape or + other materials that might directly block the hole on the top + of the sensor, and also by having a suitable static vent to + outside air. + + One good solution is to use a small rectangle of Poron + 50-30031-12X12P or equivalent to cover the sensor. This is an + open cell foam in 1/32" thickness with an adhesive backing. It + seems to do a good job of blocking sun while still allowing + airflow to and from the sensor internals. As with all other rocketry electronics, Altus Metrum altimeters must be protected from exposure to corrosive motor -- 2.30.2