{"title":"Speed Switches \u0026 Shaft Encoders","description":"\u003cp\u003e4B motion, speed, and shaft-encoder sensors for bucket elevators, conveyors, and rotating equipment — speed switches, rotary shaft encoders, sensor mounts, and system testing devices.\u003c\/p\u003e","products":[{"product_id":"4b-whirligig®-universal-shaft-sensor-mount","title":"4B Whirligig® – Universal Shaft Sensor Mount","description":"\u003cp\u003eThe Whirligig® is a fully guarded target that makes mounting motion and speed sensors simple, safe, and reliable. This universal shaft sensor mount accepts all industry-standard 18 mm and 30 mm cylindrical and DIN-style inductive sensors — including 4B's M100, M300, M800 Elite, and Milli-Speed sensors.\u003c\/p\u003e\n\u003cp\u003eThe sensor bolts to the Whirligig base plate, and the complete assembly mounts to the machine shaft through a 1\/2 in. UNC tapped hole or connects magnetically with 4B's patented Mag-Con™ adaptor. Because the entire assembly turns with the shaft, machine or shaft vibration does not affect sensor performance.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFully guarded target for easy, safe sensor mounting\u003c\/li\u003e\n\u003cli\u003eFits DIN-style and standard cylindrical inductive sensors (18 \u0026amp; 30 mm)\u003c\/li\u003e\n\u003cli\u003eSimple installation — 1\/2 in. UNC tapped hole or Mag-Con™ magnetic connection\u003c\/li\u003e\n\u003cli\u003eAvailable with 1, 2, 4, or 8 targets\u003c\/li\u003e\n\u003cli\u003eCompatible with all 4B speed switches and inductive sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShaft material: stainless steel\u003c\/li\u003e\n\u003cli\u003eBody material: polypropylene\u003c\/li\u003e\n\u003cli\u003eBearing: sealed heavy-duty stainless steel\u003c\/li\u003e\n\u003cli\u003eThread size: 1\/2 in. UNC\u003c\/li\u003e\n\u003cli\u003eHex wrench size: 5\/8 in.\u003c\/li\u003e\n\u003cli\u003eMaximum speed: 1,500 RPM\u003c\/li\u003e\n\u003cli\u003ePulses \/ targets: 1, 2, 4, or 8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible 4B sensors\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMilli-Speed Switch, M800 Elite, M300 Slipswitch, M100 Stopswitch\u003c\/li\u003e\n\u003cli\u003eP800 \/ P300 \/ P100 ProxSwitch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: an 18\/30 mm bracket (WGB1830) is included with each Whirligig. The Mag-Con™ magnetic connector (MAG2000) is available separately.\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"1 Target","offer_id":46203948597384,"sku":"WG1-4B-1","price":999.99,"currency_code":"USD","in_stock":false},{"title":"2 Targets","offer_id":46203948630152,"sku":"WG1-4B-2","price":999.99,"currency_code":"USD","in_stock":false},{"title":"4 Targets","offer_id":46203948662920,"sku":"WG1-4B-4","price":999.99,"currency_code":"USD","in_stock":false},{"title":"4 Targets – Stainless Steel","offer_id":46203948695688,"sku":"WG4-4B-4","price":999.99,"currency_code":"USD","in_stock":false},{"title":"8 Targets","offer_id":46203948728456,"sku":"WG1-4B-8","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/Whirligig-On-Bearing_c980ae02-eff5-4482-8281-8ad7a2486e01.jpg?v=1784638755"},{"product_id":"4b-milli-speed™-switch-4-20-ma-inductive-speed-sensor","title":"4B Milli-Speed™ Switch – 4–20 mA Inductive Speed Sensor","description":"\u003cp\u003eThe Milli-Speed™ is a sealed inductive speed switch with a linear 4–20 mA output, built to detect belt slip, underspeed, stop-motion, low-speed, or zero-speed conditions on bucket elevators, conveyors, airlocks, mixers, fans, grinders, and other rotating equipment. Rugged and simple to calibrate, it performs reliably in the harshest conditions.\u003c\/p\u003e\n\u003cp\u003eAn analog inductive sensor in the nose of the enclosure detects a metal target — an existing bolt head or a device mounted to the shaft, such as 4B's Whirligig® sensor mount. The Milli-Speed operates over a 20–3,600 PPM range and is set to normal running speed by simple magnetic calibration (17 mA); output rises toward 20 mA above normal speed and falls toward 4 mA as speed drops.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLinear 4–20 mA output for belt slip, underspeed, stop-motion, low- and zero-speed detection\u003c\/li\u003e\n\u003cli\u003eTotally sealed for the harshest conditions\u003c\/li\u003e\n\u003cli\u003eSimple magnetic calibration\u003c\/li\u003e\n\u003cli\u003eWide 20–3,600 PPM speed range\u003c\/li\u003e\n\u003cli\u003eWorks with an existing bolt-head target or 4B's Whirligig® mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated accessories: Whirligig® shaft sensor mount (WG1-4B-4), Mag-Con™ magnetic connector (MAG2000), SpeedMaster™ calibration tool (SM2).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"Default Title","offer_id":46204114174088,"sku":"MIL8001V4C","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/Milli-Speed-Switch_6ae1e569-70e0-439b-ae13-7ef4555a52ee.jpg?v=1784638758"},{"product_id":"4b-m800-elite-speed-switch-inductive-zero-speed-sensor","title":"4B M800 Elite Speed Switch – Inductive Zero-Speed Sensor","description":"\u003cp\u003eThe M800 Elite Speed Switch detects belt slip, underspeed, stop-motion, low-speed, or zero-speed conditions on bucket elevators, conveyors, airlocks, mixers, fans, grinders, and other rotating machines. Totally sealed and simple to calibrate, it performs in the harshest conditions.\u003c\/p\u003e\n\u003cp\u003eAn inductive sensor in the nose of the enclosure detects a metal target — an existing bolt head or a device attached to the shaft. During installation, the M800 Elite is calibrated to normal shaft RPM using the supplied magnet, and its internal microprocessor sets the alarm and shutdown relays.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMicroprocessor-controlled alarm and shutdown relays\u003c\/li\u003e\n\u003cli\u003eDual trip points for early warning and shutdown\u003c\/li\u003e\n\u003cli\u003eTotally sealed for harsh, dusty environments\u003c\/li\u003e\n\u003cli\u003eSimple magnetic calibration to normal running speed\u003c\/li\u003e\n\u003cli\u003eWorks with a bolt-head target or 4B's Whirligig® mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eModels\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM8001V10C\u003c\/strong\u003e — trip points at 10% and 20% below normal speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM8002V10C\u003c\/strong\u003e — trip points at 5% and 10% below normal speed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated accessories: Whirligig® mount (WG1-4B-4), Mag-Con™ (MAG2000), Tacho Display (TACH3V5), SpeedMaster™ (SM2).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"10% \u0026 20% trip","offer_id":46204116205704,"sku":"M8001V10C","price":999.99,"currency_code":"USD","in_stock":false},{"title":"5% \u0026 10% trip","offer_id":46204116238472,"sku":"M8002V10C","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/M800-Elite-Speed-Switch_5707d461-45bf-4784-8dfa-d26a9ef47c3b.jpg?v=1784638760"},{"product_id":"4b-m300-slipswitch-inductive-underspeed-sensor","title":"4B M300 Slipswitch – Inductive Underspeed Sensor","description":"\u003cp\u003eThe M300 Slipswitch is a simple, self-contained inductive shaft-speed monitor with a single set point that signals when shaft speed drops 20% below normal running speed. It's used to catch dangerous slow-downs and underspeed on conveyors, bucket elevators, airlocks, mixers, fans, grinders, and many other machines.\u003c\/p\u003e\n\u003cp\u003eAn inductive sensor in the nose of the enclosure detects a metal target — an existing bolt head or a device attached to the shaft. During installation the M300 is calibrated to normal shaft RPM with the supplied magnet, and its internal microprocessor sets the underspeed output to trip at exactly 20% below normal speed, suitable for automatic machine shutdown.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle 20%-underspeed trip point\u003c\/li\u003e\n\u003cli\u003eSelf-contained, microprocessor-controlled\u003c\/li\u003e\n\u003cli\u003eSimple magnetic calibration\u003c\/li\u003e\n\u003cli\u003eOutput suitable for automatic shutdown\u003c\/li\u003e\n\u003cli\u003eWorks with a bolt-head target or 4B's Whirligig® mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM3003V10C\u003c\/strong\u003e — 2-wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM3005V10CA\u003c\/strong\u003e — 5-wire\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated accessories: 3\/4 in NPT conduit adapter (A34NPT), Whirligig® mount (WG1-4B-4), Mag-Con™ (MAG2000), SpeedMaster™ (SM2), 2-wire load devices (CDL1 110 VAC \/ CDL4 24 VDC).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"2 Wire","offer_id":46204116762760,"sku":"M3003V10C","price":999.99,"currency_code":"USD","in_stock":false},{"title":"5 Wire","offer_id":46204116795528,"sku":"M3005V10CA","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/M300-Slipswitch_21b2d00e-ceda-4da2-b5a6-78b8720508cd.jpg?v=1784638762"},{"product_id":"4b-m100-stopswitch-inductive-zero-speed-stop-motion-sensor","title":"4B M100 Stopswitch – Inductive Zero-Speed \/ Stop-Motion Sensor","description":"\u003cp\u003eThe M100 Stopswitch is a simple, self-contained inductive shaft-speed monitor with a single set point that signals when the shaft has stopped rotating. It's ideal for process control, motion detection, and stopped-shaft indication.\u003c\/p\u003e\n\u003cp\u003eAn inductive sensor in the nose of the enclosure detects a metal target — an existing bolt head or a device attached to the shaft. The M100 requires no calibration and provides an output the moment the shaft stops turning.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStopped-motion monitor with a single trip set point\u003c\/li\u003e\n\u003cli\u003eInductive proximity sensing — non-contacting and fail-safe\u003c\/li\u003e\n\u003cli\u003eNo calibration required\u003c\/li\u003e\n\u003cli\u003eTotally sealed, submersible construction\u003c\/li\u003e\n\u003cli\u003eWorks with a bolt-head target or 4B's Whirligig® mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated accessories: 1\/2 in NPT conduit adapter (A12NPT), Whirligig® mount (WG1-4B-4), Mag-Con™ (MAG2000), 2-wire load devices (CDL1 110 VAC \/ CDL4 24 VDC).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"Default Title","offer_id":46204117024904,"sku":"M1001V10F","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/M100-Stopswitch_ccc7c554-21f9-4ccf-a374-2a81d6fb567e.jpg?v=1784638764"},{"product_id":"4b-speedmaster™-speed-switch-system-testing-device","title":"4B SpeedMaster™ – Speed Switch \u0026 System Testing Device","description":"\u003cp\u003eThe SpeedMaster™ with Pulse Pilot provides independent, real-time verification of your entire speed-monitoring system, confirming that alarms and shutdowns work exactly as expected.\u003c\/p\u003e\n\u003cp\u003eThe SpeedMaster operates in two modes: \u003cstrong\u003eInput mode\u003c\/strong\u003e measures the pulse rate at normal running speed, and \u003cstrong\u003eOutput mode\u003c\/strong\u003e lets you inject pulses into the sensor for testing. The Pulse Pilot fits in the gap between the 4B speed sensor and the Whirligig® cover for in-place testing.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndependent, real-time speed-system verification\u003c\/li\u003e\n\u003cli\u003eInput and Output test modes\u003c\/li\u003e\n\u003cli\u003eConfirms alarm and shutdown functionality\u003c\/li\u003e\n\u003cli\u003eWorks with the full 4B speed-switch range (Milli-Speed, M800 Elite, M300, M100)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePart numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSM2\u003c\/strong\u003e — SpeedMaster™ testing device\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePP2\u003c\/strong\u003e — Pulse Pilot\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"4B Components","offers":[{"title":"SpeedMaster (SM2)","offer_id":46204120694920,"sku":"SM2","price":999.99,"currency_code":"USD","in_stock":false},{"title":"Pulse Pilot (PP2)","offer_id":46204120727688,"sku":"PP2","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/speedmaster_1e3d3cb0-a673-4ca1-92c7-622283392600.jpg?v=1784638766"},{"product_id":"4b-rotech-rotary-shaft-encoder-stainless-steel","title":"4B Rotech Rotary Shaft Encoder – Stainless Steel","description":"\u003cp\u003eThe 4B heavy-duty stainless steel Rotech rotary shaft encoder protects equipment and personnel from dangerous underspeed and belt-slip conditions in extreme environments. It's also used for accurate speed control, direction-of-rotation detection, gate-position indication, and counting shaft revolutions.\u003c\/p\u003e\n\u003cp\u003eAn inductive sensor in the encoder body detects a steel rotor; for slow-speed or accurate position control, a photodiode reads slots on a steel disk, producing one pulse per rotor slot. The stainless housing suits washdown and corrosive environments.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy-duty stainless steel construction for extreme\/washdown environments\u003c\/li\u003e\n\u003cli\u003eUnderspeed, belt-slip, speed control, direction and position sensing\u003c\/li\u003e\n\u003cli\u003eInductive + photodiode sensing for accurate low-speed output\u003c\/li\u003e\n\u003cli\u003eAvailable in 304 or 316 stainless\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSE304SS4VB\u003c\/strong\u003e — 304 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSE316SS4VB\u003c\/strong\u003e — 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated: Ultra Wash Down version with grease zerk (XRSE), Speed Relay (SR2V1-1), Tachometer (TACH3V5).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"304 Stainless Steel","offer_id":46204121907336,"sku":"RSE304SS4VB","price":999.99,"currency_code":"USD","in_stock":false},{"title":"316 Stainless Steel","offer_id":46204121940104,"sku":"RSE316SS4VB","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/Rotech-Encoder-Stainless-Steel_75da74dd-701b-4a48-81fe-f236e4067c79.jpg?v=1784638768"},{"product_id":"4b-rotech-rotary-shaft-encoder-aluminum","title":"4B Rotech Rotary Shaft Encoder – Aluminum","description":"\u003cp\u003eThe 4B heavy-duty aluminum Rotech rotary shaft encoder protects equipment and personnel from dangerous underspeed and belt-slip conditions in extreme environments. It's also used for accurate speed control, direction-of-rotation detection, gate-position indication, and counting shaft revolutions.\u003c\/p\u003e\n\u003cp\u003eAn inductive sensor in the encoder body detects a steel rotor; for slow-speed or accurate position control, a photodiode reads slots on a steel disk, producing one pulse per rotor slot. Standard, high-temperature, and low-temperature versions are available.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy-duty aluminum construction\u003c\/li\u003e\n\u003cli\u003eUnderspeed, belt-slip, speed control, direction and position sensing\u003c\/li\u003e\n\u003cli\u003eInductive + photodiode sensing for accurate low-speed output\u003c\/li\u003e\n\u003cli\u003eStandard, high-temp, and low-temp options\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSE\u003c\/strong\u003e — standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSEHT\u003c\/strong\u003e — high temp, up to +257°F \/ +125°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSEHHT\u003c\/strong\u003e — high temp, up to +302°F \/ +150°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSE4VBF-40\u003c\/strong\u003e — low temp, down to −40°F \/ −40°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated: Mag-Con™ (MAG2000), Speed Relay (SR2V1-1), Tachometer (TACH3V5).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"Standard","offer_id":46204122595464,"sku":"RSE","price":999.99,"currency_code":"USD","in_stock":false},{"title":"High Temp (+125°C)","offer_id":46204122628232,"sku":"RSEHT","price":999.99,"currency_code":"USD","in_stock":false},{"title":"High Temp (+150°C)","offer_id":46204122661000,"sku":"RSEHHT","price":999.99,"currency_code":"USD","in_stock":false},{"title":"Low Temp (−40°C)","offer_id":46204122693768,"sku":"RSE4VBF-40","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/Rotech-Encoder-Aluminum_8a4f2f34-8379-4a6d-b788-5082cb9988bd.jpg?v=1784638772"},{"product_id":"4b-rotech-rotary-shaft-encoder-polypropylene","title":"4B Rotech Rotary Shaft Encoder – Polypropylene","description":"\u003cp\u003eThe 4B heavy-duty polypropylene Rotech rotary shaft encoder protects equipment and personnel from dangerous underspeed and belt-slip conditions in extreme environments. It's also used for accurate speed control, direction-of-rotation detection, gate-position indication, and counting shaft revolutions.\u003c\/p\u003e\n\u003cp\u003eAn inductive sensor in the encoder body detects a steel rotor; for slow-speed or accurate position control, a photodiode reads slots on a steel disk, producing one pulse per rotor slot. The corrosion-resistant polypropylene housing suits chemically aggressive environments.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCorrosion-resistant polypropylene construction\u003c\/li\u003e\n\u003cli\u003eUnderspeed, belt-slip, speed control, direction and position sensing\u003c\/li\u003e\n\u003cli\u003eInductive + photodiode sensing for accurate low-speed output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePart number\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRSEP\u003c\/strong\u003e — Rotech Encoder, polypropylene\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated: Mag-Con™ (MAG2000), Speed Relay (SR2V1-1), Tachometer (TACH3V5).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"Default Title","offer_id":46204122890376,"sku":"RSEP","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/Rotech-Encoder-Poly_5e3bcbda-f7fc-4a77-bb88-b236849cbbad.jpg?v=1784638773"},{"product_id":"4b-wda-motion-belt-alignment-sensor","title":"4B WDA Motion \u0026 Belt Alignment Sensor","description":"\u003cp\u003eThe WDA is a non-contacting, extended-range magnetic proximity sensor that detects moving ferrous material up to 3 inches away and is unaffected by dust or material build-up.\u003c\/p\u003e\n\u003cp\u003eDesigned for bucket elevators and conveyors, the WDA measures belt speed and alignment, detecting metal elevator buckets or the ferrous bolts on plastic buckets. It also works as a broken\/slack-chain detector on drag-chain conveyors and as a speed switch for screw conveyors.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNon-contacting magnetic proximity sensing up to 3 in. range\u003c\/li\u003e\n\u003cli\u003eUnaffected by dust or material build-up\u003c\/li\u003e\n\u003cli\u003eBelt speed, alignment, motion, and slack-chain detection\u003c\/li\u003e\n\u003cli\u003eStandard and high-temperature versions\u003c\/li\u003e\n\u003cli\u003eSensor mount (WDAMB) included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWDA3V34C\u003c\/strong\u003e — standard sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHTAS1V34\u003c\/strong\u003e — high-temperature sensor\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"4B Components","offers":[{"title":"Standard","offer_id":46204123840648,"sku":"WDA3V34C","price":999.99,"currency_code":"USD","in_stock":false},{"title":"High Temperature","offer_id":46204123873416,"sku":"HTAS1V34","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/WDA-Sensor_76b8ad7a-c491-4fe0-a31f-3f4dcecb8291.jpg?v=1784638776"},{"product_id":"4b-heavy-duty-whirligig®-shaft-sensor-mount","title":"4B Heavy-Duty Whirligig® – Shaft Sensor Mount","description":"\u003cp\u003eThe Heavy-Duty (HD) Whirligig® is a fully guarded target for easy mounting of motion sensors, built for the toughest rotating machinery. It works with 4B's inductive proximity sensors including the M100 Stopswitch, P100 ProxSwitch, and P300 ProxSwitch.\u003c\/p\u003e\n\u003cp\u003eUsed on conveyors, bucket elevators, and other rotating equipment, the HD Whirligig monitors shaft speed for continuous, low-speed, or high-speed conditions. The sensor (sold separately) inserts into the HD Whirligig housing and the complete assembly bolts to the machine shaft through a UNC tapped hole. Because the assembly turns with the shaft, machine vibration or movement does not affect performance.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFully guarded target for heavy-duty applications\u003c\/li\u003e\n\u003cli\u003eAvailable in 2- or 4-pulse configurations\u003c\/li\u003e\n\u003cli\u003eChoice of 1\/2 in. or 5\/8 in. UNC threads\u003c\/li\u003e\n\u003cli\u003eCompatible with M100 Stopswitch and P100 ProxSwitch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConfigurations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWGHD1-2-18-R1\/2\u003c\/strong\u003e — 2 pulse, 1\/2 in. UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWGHD1-2-18-R\u003c\/strong\u003e — 2 pulse, 5\/8 in. UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWGHD1-4-18-R1\/2\u003c\/strong\u003e — 4 pulse, 1\/2 in. UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWGHD1-4-18-R\u003c\/strong\u003e — 4 pulse, 5\/8 in. UNC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eRelated: Speed Relay (IFMFR1L, 120\/240 VAC or 24 VDC).\u003c\/em\u003e\u003c\/p\u003e","brand":"4B Components","offers":[{"title":"2 Pulse, 1\/2\" UNC","offer_id":46204124102792,"sku":"WGHD1-2-18-R1\/2","price":999.99,"currency_code":"USD","in_stock":false},{"title":"2 Pulse, 5\/8\" UNC","offer_id":46204124135560,"sku":"WGHD1-2-18-R","price":999.99,"currency_code":"USD","in_stock":false},{"title":"4 Pulse, 1\/2\" UNC","offer_id":46204124168328,"sku":"WGHD1-4-18-R1\/2","price":999.99,"currency_code":"USD","in_stock":false},{"title":"4 Pulse, 5\/8\" UNC","offer_id":46204124201096,"sku":"WGHD1-4-18-R","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/3474\/0360\/files\/HD-Whirligig_e3f2337a-1b99-42c2-bd52-28245c2d6448.jpg?v=1784638778"},{"product_id":"4b-encoder-flex-1024-rotary-shaft-encoder-gate-position-monitor","title":"4B Encoder-Flex 1024 – Rotary Shaft Encoder \u0026 Gate Position Monitor","description":"\u003cp\u003eThe Encoder-Flex 1024 is a rotary shaft encoder that monitors slide-gate position, shaft position, or shaft speed — for rack-and-pinion gates, valves, distributors, and rotating shafts on slow-moving conveyors, mixers, and dryers.\u003c\/p\u003e\n\u003cp\u003eResolution is programmable from 1 to 1,024 pulses per revolution. 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