Measures tension on the rope, to an accuracy of ± 5 percent. Accuracy is not affected by initial rope size, or the change in rope size as it is loaded. 0-10 VDC Analog output to optional strip chart recorder for permanent record of pulling force. Switchable 120VAC receptacle for chart recorder. Use with pulling rope up to 7/8” diameter (22.2 mm) maximum. Also use with Kevlar® tape