1.0Industrial | Air Monitorhttps://www.airmonitor.com/industrialrich600338<blockquote class="wp-embedded-content" data-secret="7zioXIY1Rz"><a href="https://www.airmonitor.com/industrial/product/vel-trol-ii-transmitter/">VEL-trol II</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.airmonitor.com/industrial/product/vel-trol-ii-transmitter/embed/#?secret=7zioXIY1Rz" width="600" height="338" title="“VEL-trol II” — Industrial | Air Monitor" data-secret="7zioXIY1Rz" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.airmonitor.com/industrial/wp-includes/js/wp-embed.min.js /* ]]> */ </script> https://www.airmonitor.com/industrial/wp-content/uploads/sites/3/vel-trol-ii-transmitter.png600600Product Type: Differential Pressure & Flow Transmitters Technology Type: Ultra-low range DP & Flow Transmitter with a controller and Auto Zero Get process control with ultra-low flow accuracy and reliable airflow measurement over time with auto zeroing capability. The VEL-trol II transmitter-controller is furnished with an automatic zeroing circuit capable of electronically adjusting the transmitter zero at predetermined time intervals while simultaneously holding the transmitter output signal. The VEL-trol II transmitter incorporates the three control modes of proportional, integral reset, and inverse derivative. This feature permits the controller action to be tuned to the extreme dynamics of the airflow or pressurization control process. High accuracy at very low flows Automatic zeroing to avoid offset drifts Maintain control of associated process variables