diff --git a/src/pbHelpers/ComponentTypes/DragerGasDongle.ts b/src/pbHelpers/ComponentTypes/DragerGasDongle.ts
index cb2b3c6..a8f2090 100644
--- a/src/pbHelpers/ComponentTypes/DragerGasDongle.ts
+++ b/src/pbHelpers/ComponentTypes/DragerGasDongle.ts
@@ -167,7 +167,8 @@ export function dragerGasDongle(subtype: number = 0): ComponentTypeExtension {
         lines: [],
         average: []
       };
-      if (subtype === quack.DragerGasDongleSubtype.DRAGER_GAS_DONGLE_SUBTYPE_O2) {
+      //sets the value as a percent for the chart data
+      if (subtype === quack.DragerGasDongleSubtype.DRAGER_GAS_DONGLE_SUBTYPE_O2 || subtype === quack.DragerGasDongleSubtype.DRAGER_GAS_DONGLE_SUBTYPE_LEL) {
         let firstTime: Moment | undefined;
         let lastTime: Moment | undefined;
         let valMap: Map<number, number[]> = new Map<number, number[]>();