diff --git a/function/rbe/README.md b/function/rbe/README.md
index e7475bf5..c43946ff 100644
--- a/function/rbe/README.md
+++ b/function/rbe/README.md
@@ -18,6 +18,9 @@ Usage
 A simple node to provide report by exception (RBE) and deadband function
 - only passes on data if it has changed.
 
+This works on a per **msg.topic** basis. This means that a single rbe node can
+handle multiple topics at the same time.
+
 ###RBE mode
 
 Outputs the **msg** if the **msg.payload** is different to the previous one.
@@ -29,4 +32,14 @@ same value. Saves bandwidth, etc...
 In deadband mode the incoming payload should contain a parseable *number* and is
 output only if greater than + or - the *band gap* away from the previous output.
 
-Will accept numbers, or parseable strings like  "18.4 C"  or "$500"
+The deadband value can be specified as a fixed number, or a percentage. E.g. 10
+or 5% . If % mode is used then the output will only get sent if the input payload
+value is equal or more than the specified % away from the previously sent value.
+
+For example - if last sent value was 100, and deadband is set to 10% - a value
+of 110 will pass - then the next value has to be 121 in order to pass (= 110 + 10% = 121).
+
+This is mainly useful if you want to operate across multiple topics at the same
+time that may have widely differing input ranges.
+
+Will only accept numbers, or parseable strings like  "18.4 C"  or "$500"
diff --git a/function/rbe/locales/en-US/rbe.json b/function/rbe/locales/en-US/rbe.json
new file mode 100644
index 00000000..fda5cecd
--- /dev/null
+++ b/function/rbe/locales/en-US/rbe.json
@@ -0,0 +1,19 @@
+{
+    "rbe": {
+        "label": {
+            "func": "Mode",
+            "bandgap": "Band gap",
+            "name": "Name"
+        },
+        "eg":{
+            "bandgap": "e.g. 10 or 5%"
+        },
+        "opts": {
+            "rbe": "RBE - report if value changed",
+            "deadband": "Deadband - report if changed more than",
+        },
+        "warn": {
+            "nonumber": "no number found in payload"
+        }
+    }
+}
diff --git a/function/rbe/package.json b/function/rbe/package.json
index 5add0be8..e9a86991 100644
--- a/function/rbe/package.json
+++ b/function/rbe/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-rbe",
-    "version"       : "0.0.4",
+    "version"       : "0.0.7",
     "description"   : "A Node-RED node that provides report-by-exception (RBE) and deadband capability.",
     "dependencies"  : {
     },
diff --git a/function/rbe/rbe.html b/function/rbe/rbe.html
index 2476fa95..c8fa4b4f 100644
--- a/function/rbe/rbe.html
+++ b/function/rbe/rbe.html
@@ -16,19 +16,19 @@
 
 <script type="text/x-red" data-template-name="rbe">
     <div class="form-row">
-        <label for="node-input-func"><i class="fa fa-wrench"></i> Mode</label>
+        <label for="node-input-func"><i class="fa fa-wrench"></i> <span data-i18n="rbe.label.func"></span></label>
         <select type="text" id="node-input-func" style="width:74%;">
-            <option value="rbe">RBE - report if value changed</option>
-            <option value="deadband">Deadband - report if changed more than</option>
+            <option value="rbe" data-i18n="rbe.opts.rbe"></option>
+            <option value="deadband" data-i18n="rbe.opts.deadband></option>
         </select>
     </div>
     <div class="form-row" id="node-bandgap">
-        <label for="node-input-gap"><i class="fa fa-random"></i> Band gap</label>
-        <input type="text" id="node-input-gap" placeholder="e.g. 10" style="width:71%;">
+        <label for="node-input-gap"><i class="fa fa-random"></i> <span data-i18n="rbe.label.bandgap"></span></label>
+        <input type="text" id="node-input-gap" data-i18n="[placeholder]rbe.eg.bandgap" style="width:71%;">
     </div>
     <div class="form-row">
-        <label for="node-input-name"><i class="fa fa-tag"/> Name</label>
-        <input type="text" id="node-input-name" placeholder="Name" style="width:71%;">
+        <label for="node-input-name"><i class="fa fa-tag"/> <span data-i18n="rbe.label.name"></span></label>
+        <input type="text" id="node-input-name" data-i18n="[placeholder]rbe.label.name" style="width:71%;">
     </div>
 </script>
 
@@ -38,16 +38,19 @@
     different to the previous one. Works on numbers and strings.</p>
     <p>In <b>deadband</b> mode the incoming payload should contain a parseable <i>number</i> and is
     output only if greater than + or - the <i>band gap</i> away from the previous output.</p>
+    <p>Deadband also supports % - only sends if the input differs by more than x% of the original value.</p>
+    <p><b>Note:</b> This works on a per <b>msg.topic</b> basis. This means that a single rbe node can
+handle multiple topics at the same time.</p>
 </script>
 
 <script type="text/javascript">
-    RED.nodes.registerType('rbe',{
+    RED.nodes.registerType("rbe", {
         color:"#E2D96E",
         category: 'function',
         defaults: {
             name: {value:""},
             func: {value:"rbe"},
-            gap: {value:"",validate:RED.validators.regex(/^(\d*|)$/)}
+            gap: {value:"",validate:RED.validators.regex(/^(\d*|)(%|)$/)}
         },
         inputs:1,
         outputs:1,
diff --git a/function/rbe/rbe.js b/function/rbe/rbe.js
index 45e151f2..3c0b4269 100644
--- a/function/rbe/rbe.js
+++ b/function/rbe/rbe.js
@@ -1,5 +1,5 @@
 /**
- * Copyright 2014 IBM Corp.
+ * Copyright 2014, 2015 IBM Corp.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,33 +16,40 @@
 
 module.exports = function(RED) {
     "use strict";
-
     function RbeNode(n) {
         RED.nodes.createNode(this,n);
         this.func = n.func || "rbe";
-        this.gap = n.gap || 0;
+        this.gap = n.gap || "0";
+        this.pc = false;
+        if (this.gap.substr(-1) === "%") {
+            this.pc = true;
+            this.gap = parseFloat(this.gap);
+        }
+        this.g = this.gap;
         var node = this;
 
-        var previous = null;
+        node.previous = {};
         this.on("input",function(msg) {
             if (msg.hasOwnProperty("payload")) {
+                var t = msg.topic || "_no_topic";
                 if (this.func === "rbe") {
-                    if (msg.payload != previous) {
-                        previous = msg.payload;
+                    if (msg.payload != node.previous[t]) {
+                        node.previous[t] = msg.payload;
                         node.send(msg);
                     }
                 }
                 else {
                     var n = parseFloat(msg.payload);
                     if (!isNaN(n)) {
-                        if (previous == null) { previous = n - node.gap; }
-                        if (Math.abs(n - previous) >= node.gap) {
-                            previous = n;
+                        if (node.pc) { node.gap = (node.previous[t] * node.g / 100) || 0; }
+                        if (!node.previous.hasOwnProperty(t)) { node.previous[t] = n - node.gap; }
+                        if (Math.abs(n - node.previous[t]) >= node.gap) {
+                            node.previous[t] = n;
                             node.send(msg);
                         }
                     }
                     else {
-                        node.warn("no number found in payload");
+                        node.warn(RED._("rbe.warn.nonumber"));
                     }
                 }
             } // ignore msg with no payload property.
diff --git a/test/function/rbe/rbe_spec.js b/test/function/rbe/rbe_spec.js
index 9a885b52..ba70ce27 100644
--- a/test/function/rbe/rbe_spec.js
+++ b/test/function/rbe/rbe_spec.js
@@ -37,13 +37,13 @@ describe('rbe node', function() {
             var n1 = helper.getNode("n1");
             n1.should.have.property("name", "rbe1");
             n1.should.have.property("func", "rbe");
-            n1.should.have.property("gap", 0);
+            n1.should.have.property("gap", "0");
             done();
         });
     });
 
     it('should only send output if payload changes', function(done) {
-        var flow = [{"id":"n1", "type":"rbe", func:"rbe", gap:0, wires:[["n2"]] },
+        var flow = [{"id":"n1", "type":"rbe", func:"rbe", gap:"0", wires:[["n2"]] },
             {id:"n2", type:"helper"} ];
         helper.load(testNode, flow, function() {
             var n1 = helper.getNode("n1");
@@ -70,7 +70,7 @@ describe('rbe node', function() {
     });
 
     it('should only send output if more than x away from original value', function(done) {
-        var flow = [{"id":"n1", "type":"rbe", func:"gap", gap:10, wires:[["n2"]] },
+        var flow = [{"id":"n1", "type":"rbe", func:"gap", gap:"10", wires:[["n2"]] },
             {id:"n2", type:"helper"} ];
         helper.load(testNode, flow, function() {
             var n1 = helper.getNode("n1");
@@ -100,8 +100,37 @@ describe('rbe node', function() {
         });
     });
 
+    it('should only send output if more than x% away from original value', function(done) {
+        var flow = [{"id":"n1", "type":"rbe", func:"gap", gap:"10%", wires:[["n2"]] },
+            {id:"n2", type:"helper"} ];
+        helper.load(testNode, flow, function() {
+            var n1 = helper.getNode("n1");
+            var n2 = helper.getNode("n2");
+            var c = 0;
+            n2.on("input", function(msg) {
+                if (c === 0) {
+                    msg.should.have.a.property("payload", 100);
+                }
+                else if (c === 1) {
+                    msg.should.have.a.property("payload", 120);
+                }
+                else {
+                    msg.should.have.a.property("payload", 132);
+                    done();
+                }
+                c += 1;
+            });
+            n1.emit("input", {payload:100});
+            n1.emit("input", {payload:95});
+            n1.emit("input", {payload:105});
+            n1.emit("input", {payload:120});
+            n1.emit("input", {payload:130});
+            n1.emit("input", {payload:132});
+        });
+    });
+
     it('should warn if no number found in gap mode', function(done) {
-        var flow = [{"id":"n1", "type":"rbe", func:"gap", gap:10, wires:[["n2"]] },
+        var flow = [{"id":"n1", "type":"rbe", func:"gap", gap:"10", wires:[["n2"]] },
             {id:"n2", type:"helper"} ];
         helper.load(testNode, flow, function() {
             var n1 = helper.getNode("n1");
@@ -121,7 +150,7 @@ describe('rbe node', function() {
                 msg.should.have.property('level', helper.log().WARN);
                 msg.should.have.property('id', 'n1');
                 msg.should.have.property('type', 'rbe');
-                msg.should.have.property('msg', 'no number found in payload');
+                msg.should.have.property('msg', 'rbe.warn.nonumber');
                 done();
             },50);
             n1.emit("input", {payload:"banana"});