{"id":23532,"date":"2020-12-14T13:58:55","date_gmt":"2020-12-14T06:58:55","guid":{"rendered":"https:\/\/techmaster.com.vn\/?post_type=product&#038;p=23532"},"modified":"2023-07-11T15:04:32","modified_gmt":"2023-07-11T08:04:32","slug":"extech-461891-high-precision-contact-tachometer","status":"publish","type":"product","link":"https:\/\/techmaster.com.vn\/en\/extech-461891-high-precision-contact-tachometer\/","title":{"rendered":"Extech 461891: High Precision Contact Tachometer"},"content":{"rendered":"<p><strong>SPECIFICATIONS EXTECH 461891: HIGH PRECISION CONTACT TACHOMETER<\/strong><\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<ul>\n<li>General Specifications Extech 461891<\/li>\n<\/ul>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Circuit: Custom one-chip LSI microprocessor circuit<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Timebase: Quartz crystal<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Display: 5-digit multi-function LCD display<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"section\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Measurements: Rotation Speed 0.5 to 19,999 rpm; Surface Speed 0.2 to 6560 ft\/min. 0.05 to 1999.9 m\/min<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Memory: Last and Max\/Min readings<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Extech 461891 Sampling Time: 1 second<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Operating Temperature\/RH: 32 \u00b0F to 122 \u00b0F (0 \u00b0C to 50 \u00b0C) \/ &lt;80% RH<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Power Supply: 4 x 1.5V AA batteries<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Power Consumption: Approx. 10 mA<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Weight: 0.62 lb (280 g) including batteries<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Dimensions: 8.2 x 2.8 x1.5&#8243; (208 x 72 x 37 mm)<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Accessories: Cone rpm adaptor, funnel rpm adaptor, surface speed test wheel, and carrying case<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<ul>\n<li>Range Specifications Extech 461891<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<p>\u2014\u00a0<span style=\"color: #555555;\">rpm<\/span><\/p>\n<\/div>\n<div>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Range: 0.5 to 19,999 rpm<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Resolution: 0.1 rpm (0.5 to 999.9 rpm); 1 rpm (over 1000 rpm)<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Accuracy: + (0.05% rdg +1d) @23+ 5oC<\/p>\n<p>\u2014\u00a0ft\/min<\/p>\n<p>Range: 0.2 to 6560 ft\/min<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Resolution: 0.1 ft\/min (0.2 to 999.9 ft\/min); 1 ft\/min (over 1000 ft\/min)<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Accuracy: \u00b1 (1% rdg + 1 digit)<\/p>\n<p>\u2014\u00a0m\/min<\/p>\n<p>Range: 0.05 to 1999.9 m\/min<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Resolution: 0.01 m\/min (0.05 to 99.99 m\/min); 0.1 m\/min (over 100 m\/min)<\/p>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>Accuracy: \u00b1 (1% rdg + 1 digit)<\/p>\n<h2><strong>Introduction Extech 461891<\/strong><\/h2>\n<h3>Fast and accurate rpm and surface speed measurements to 20,000rpm<\/h3>\n<p>The 461891 is a contact Tachometer. Surface wheels measure contact surface speeds (10 to 9,999 rpm) of rotating objects. The memory button holds the last reading and recalls the min\/max readings display. Complete with wheels for linear surface speed (0.2 to 6560 feet\/minute; 0.05 to 1999.9 meters\/minute) or RPM measurements. Comes with a cone tip, flat tip, and spare wheel for surface speed measurements, four AA batteries, a carrying case, and a user manual.<\/p>\n<h2><strong>Features<\/strong><\/h2>\n<div class=\"page\" title=\"Page 1\">\n<div class=\"section\">\n<div class=\"layoutArea\">\n<div class=\"column\">&#8211; Large 5 digit LCD display is easy to read<br \/>\n&#8211; Built-in memory recalls the last MAX\/MIN value stored<br \/>\n&#8211; Autoranging with 0.05% accuracy<br \/>\n&#8211; Contact measurements from 0.5 to 19,999rpm plus linear surface <a href=\"https:\/\/techmaster.com.vn\/en\/extech-461825-combination-photo-tachometer-stroboscope\/\">speed measures<\/a> in ft\/min or m\/min<br \/>\n&#8211; Simply contact rotating object with sensor tip and read<br \/>\n&#8211; Accessory wheels enable the tachometer to measure linear surface speeds<br \/>\n&#8211; Complete with cone tip, flat tip, and\u00a0spare wheel for surface speed measurements, four 1.5V AA batteries, and case<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<h2><strong>Key Features<\/strong><\/h2>\n<ul id=\"features\">\n<li>Large 5 digit LCD display is easy to read<\/li>\n<li>0.05% basic accuracy<\/li>\n<li>Make contact measurements of rotating objects<\/li>\n<li>Measure linear surface speeds in ft\/min or m\/min using three accessory wheels provided<\/li>\n<li>Recalls Last\/MAX\/MIN values<\/li>\n<\/ul>\n","protected":false},"featured_media":5845,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[260,621],"product_tag":[],"class_list":{"0":"post-23532","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-measuring-instruments","7":"product_cat-tachometer","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Extech 461891: High Precision Contact Tachometer - Techmaster Electronics JSC<\/title>\n<meta name=\"description\" content=\"The Extech 461891 is a contact Tachometer. 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