{"product_id":"magnetic-reed-switch-2x14mm-normally-open-no-glass-tube-arduino-5pack","title":"Magnetic Reed Switch — 2×14mm, Normally Open (NO), Glass Tube, Arduino (5-Pack)","description":"\u003ch2\u003eMagnetic Reed Switch — 2×14mm, Normally Open (NO), Glass Tube (5-Pack)\u003c\/h2\u003e\u003cp\u003eThese 2×14mm glass-encapsulated normally open (NO) reed switches are the compact version of the standard 4×28mm reed switch, offering the same reliable magnetic proximity switching in a smaller package. The contacts close when a magnet is brought within proximity and open when the magnet is removed. The hermetically sealed glass tube protects the contacts from contamination, making them suitable for compact door\/window sensors, flow meters, bicycle speedometers, and miniature proximity detection applications where the larger 4×28mm switch does not fit.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e2mm diameter × 14mm length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Type\u003c\/td\u003e\n\u003ctd\u003eNormally Open (NO) — closes on magnet proximity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eHermetically sealed glass tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e10W max (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Switching Voltage\u003c\/td\u003e\n\u003ctd\u003e100V DC \/ 100V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Switching Current\u003c\/td\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperate Distance\u003c\/td\u003e\n\u003ctd\u003e~5–15mm (magnet dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003e2×14mm vs 4×28mm Reed Switch\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003e2×14mm (this listing)\u003c\/th\u003e\n\u003cth\u003e4×28mm\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eCompact (2mm × 14mm)\u003c\/td\u003e\n\u003ctd\u003eStandard (4mm × 28mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperate distance\u003c\/td\u003e\n\u003ctd\u003e~5–15mm\u003c\/td\u003e\n\u003ctd\u003e~10–20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent rating\u003c\/td\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eCompact sensors, PCB mount, tight spaces\u003c\/td\u003e\n\u003ctd\u003eDoor\/window sensors, standard applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose 2×14mm Reed Switches?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 2×14mm size\u003c\/strong\u003e — fits in tight spaces where 4×28mm switches are too large\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHermetically sealed\u003c\/strong\u003e — contacts protected from dust, moisture, and corrosive gases\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo power consumption\u003c\/strong\u003e — passive switch, zero idle current draw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast switching\u003c\/strong\u003e — \u0026lt;1ms operation for flow meter pulse counting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-pack value\u003c\/strong\u003e — sufficient for multiple sensor installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With \/ Common Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino door\/window sensor\u003c\/strong\u003e: Connect between GPIO (INPUT_PULLUP) and GND — LOW = magnet present, HIGH = magnet removed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact flow meter\u003c\/strong\u003e: 2×14mm switch triggered by rotating magnet on miniature flow meter paddle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBicycle speedometer\u003c\/strong\u003e: Small reed switch + magnet on spoke for compact speed sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCB-mounted sensor\u003c\/strong\u003e: Solder leads directly to PCB for compact proximity detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWearable electronics\u003c\/strong\u003e: Compact magnetic switch for wearable device lid\/clasp detection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I connect a 2×14mm reed switch to Arduino?\u003c\/strong\u003e\u003cbr\u003eA: Connect one lead to a digital pin (e.g., D2), the other lead to GND. In code: \u003ccode\u003epinMode(2, INPUT_PULLUP);\u003c\/code\u003e When the magnet is near, the switch closes and the pin reads LOW. When the magnet is removed, the internal pull-up holds the pin HIGH. No external resistor needed with INPUT_PULLUP mode.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What magnet works best with the 2×14mm reed switch?\u003c\/strong\u003e\u003cbr\u003eA: Use a small neodymium (NdFeB) magnet for reliable operation at 5–15mm distance. The smaller size of this switch means it has a shorter operate distance than the 4×28mm version — position the magnet within 10mm for reliable switching. Rare earth magnets (neodymium) provide stronger fields than ceramic magnets for the same size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I solder the 2×14mm reed switch leads directly to a PCB?\u003c\/strong\u003e\u003cbr\u003eA: Yes — the leads can be soldered to PCB through-holes. Use a low-wattage iron (25–30W) and apply heat briefly (2–3 seconds maximum) to avoid cracking the glass tube from thermal shock. Do not grip the glass tube with pliers during soldering — hold the leads only. Bend leads gently at least 3mm from the glass end.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e5× Magnetic Reed Switch (2×14mm, normally open, glass tube)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991470854379,"sku":"\u003cnone\u003e","price":5.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/no-magnetic-reed-switch-2x14mm-arduino.webp?v=1761633876","url":"https:\/\/keszoox.com\/products\/magnetic-reed-switch-2x14mm-normally-open-no-glass-tube-arduino-5pack","provider":"Keszoox","version":"1.0","type":"link"}