Are you certain these switches are normally closed ? The picture of the light circuit indicates they are normally open, without magnet.

You are correct. Almost all of the reed switches on Amazon universally have the NO/NC descriptions backwards. Even the guy who responded to you about his RV steps was mistaken as his application would require a normally closed switch (ie. door opening and removing the magnet would allow the current to flow). I think the big misunderstanding is these vendors (and some people) think the "normal" position is with a magnet adjacent the reed switch. It is not.

UPC	726972605882
Manufacturer	Gebildet
Model Number	DE453
Product Dimensions	14 x 11 x 1.1 cm; 50 g
Are Batteries Included	No
Item Weight	50 g

Gebildet 3個 埋め込み式有線セキュリティウィンドウゲート 接触センサー アラーム 磁気リードスイッチ ブラック 磁気ドアセンサー 通常開く磁気スイッチ

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions

Gebildet 3個埋め込み式有線セキュリティウィンドウゲート接触センサーアラーム磁気リードスイッチブラック磁気ドアセンサー通常開く磁気スイッチ