diff --git a/interface/src/project/SettingsCustomization.tsx b/interface/src/project/SettingsCustomization.tsx
index 562c9faad..850054ad3 100644
--- a/interface/src/project/SettingsCustomization.tsx
+++ b/interface/src/project/SettingsCustomization.tsx
@@ -66,7 +66,7 @@ const SettingsCustomization: FC = () => {
 
   const entities_theme = useTheme({
     Table: `
-      --data-table-library_grid-template-columns: 120px repeat(1, minmax(0, 1fr)) 120px;
+      --data-table-library_grid-template-columns: 120px repeat(1, minmax(80px, 1fr)) 40px 40px 120px;
     `,
     BaseRow: `
       font-size: 14px;
@@ -75,6 +75,12 @@ const SettingsCustomization: FC = () => {
       }
     `,
     BaseCell: `
+      &:nth-of-type(3) {
+        text-align: right;
+      }
+      &:nth-of-type(4) {
+        text-align: right;
+      }
       &:last-of-type {
         text-align: right;
       }
@@ -122,6 +128,12 @@ const SettingsCustomization: FC = () => {
       &:nth-of-type(2) {
         padding: 8px;
       }
+      &:nth-of-type(3) {
+        padding-right: 4px;
+      }
+      &:nth-of-type(4) {
+        padding-right: 4px;
+      }
       &:last-of-type {
         padding-right: 8px;
       }
@@ -446,6 +458,8 @@ const SettingsCustomization: FC = () => {
                       {LL.NAME()}
                     </Button>
                   </HeaderCell>
+                  <HeaderCell stiff>min</HeaderCell>
+                  <HeaderCell stiff>max</HeaderCell>
                   <HeaderCell resize>{LL.VALUE(0)}</HeaderCell>
                 </HeaderRow>
               </Header>
@@ -497,6 +511,8 @@ const SettingsCustomization: FC = () => {
                       </ToggleButtonGroup>
                     </Cell>
                     <Cell>{formatName(de)}</Cell>
+                    <Cell>{!(de.m & DeviceEntityMask.DV_READONLY) && (formatValue(de.mi))}</Cell>
+                    <Cell>{!(de.m & DeviceEntityMask.DV_READONLY) && (formatValue(de.ma))}</Cell>
                     <Cell>{formatValue(de.v)}</Cell>
                   </Row>
                 ))}
@@ -626,7 +642,7 @@ const SettingsCustomization: FC = () => {
                   onChange={updateValue(setDeviceEntity)}
                 />
               </Grid>
-              {typeof de.v === 'number' && de.w && (
+              {typeof de.v === 'number' && de.w && !(de.m & DeviceEntityMask.DV_READONLY) && (
                 <>
                   <Grid item>
                     <TextField
diff --git a/src/emsdevice.cpp b/src/emsdevice.cpp
index c0cd2c67e..b32d9fa46 100644
--- a/src/emsdevice.cpp
+++ b/src/emsdevice.cpp
@@ -947,15 +947,14 @@ void EMSdevice::generate_values_web_customization(JsonArray & output) {
         obj["m"] = dv.state >> 4; // send back the mask state. We're only interested in the high nibble
         obj["w"] = dv.has_cmd;    // if writable
 
-        if (dv.has_cmd) {
-            // set the custom min and max values if there are any
+        if (dv.has_cmd &&  (obj["v"].is<float>() || obj["v"].is<int>())) {
+            // set the min and max values if there are any and if entity has a value
             int16_t  dv_set_min;
             uint16_t dv_set_max;
-            if (dv.get_custom_min(dv_set_min)) {
-                obj["mi"] = fahrenheit ? (int)(dv_set_min * 1.8 + 32 * (fahrenheit - 1)) : dv_set_min;
-            }
-            if (dv.get_custom_max(dv_set_max)) {
-                obj["ma"] = fahrenheit ? (int)(dv_set_max * 1.8 + 32 * (fahrenheit - 1)) : dv_set_max;
+            if (dv.get_min_max(dv_set_min, dv_set_max)) {
+                char s[10];
+                obj["mi"] = Helpers::render_value(s, dv_set_min, 0, fahrenheit);
+                obj["ma"] = Helpers::render_value(s, dv_set_max, 0, fahrenheit);
             }
         }
     }
diff --git a/src/emsdevicevalue.cpp b/src/emsdevicevalue.cpp
index dd15a653b..9fedd8c7a 100644
--- a/src/emsdevicevalue.cpp
+++ b/src/emsdevicevalue.cpp
@@ -287,13 +287,13 @@ bool DeviceValue::get_min_max(int16_t & dv_set_min, uint16_t & dv_set_max) {
 
     if (type == DeviceValueType::USHORT) {
         dv_set_min = Helpers::transformNumFloat(0, numeric_operator, fahrenheit);
-        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_USHORT_NOTSET, numeric_operator, fahrenheit);
+        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_USHORT_NOTSET - 1, numeric_operator, fahrenheit);
         return true;
     }
 
     if (type == DeviceValueType::SHORT) {
-        dv_set_min = Helpers::transformNumFloat(-EMS_VALUE_SHORT_NOTSET, numeric_operator, fahrenheit);
-        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_SHORT_NOTSET, numeric_operator, fahrenheit);
+        dv_set_min = Helpers::transformNumFloat(-EMS_VALUE_SHORT_NOTSET + 1, numeric_operator, fahrenheit);
+        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_SHORT_NOTSET - 1, numeric_operator, fahrenheit);
         return true;
     }
 
@@ -301,7 +301,7 @@ bool DeviceValue::get_min_max(int16_t & dv_set_min, uint16_t & dv_set_max) {
         if (uom == DeviceValueUOM::PERCENT) {
             dv_set_max = 100;
         } else {
-            dv_set_max = Helpers::transformNumFloat(EMS_VALUE_UINT_NOTSET, numeric_operator, fahrenheit);
+            dv_set_max = Helpers::transformNumFloat(EMS_VALUE_UINT_NOTSET - 1, numeric_operator, fahrenheit);
         }
         return true;
     }
@@ -311,19 +311,19 @@ bool DeviceValue::get_min_max(int16_t & dv_set_min, uint16_t & dv_set_max) {
             dv_set_min = -100;
             dv_set_max = 100;
         } else {
-            dv_set_min = Helpers::transformNumFloat(-EMS_VALUE_INT_NOTSET, numeric_operator, fahrenheit);
-            dv_set_max = Helpers::transformNumFloat(EMS_VALUE_INT_NOTSET, numeric_operator, fahrenheit);
+            dv_set_min = Helpers::transformNumFloat(-EMS_VALUE_INT_NOTSET + 1, numeric_operator, fahrenheit);
+            dv_set_max = Helpers::transformNumFloat(EMS_VALUE_INT_NOTSET - 1, numeric_operator, fahrenheit);
         }
         return true;
     }
 
     if (type == DeviceValueType::ULONG) {
-        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_ULONG_NOTSET, numeric_operator);
+        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_ULONG_NOTSET - 1, numeric_operator);
         return true;
     }
 
     if (type == DeviceValueType::TIME) {
-        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_ULONG_NOTSET, numeric_operator);
+        dv_set_max = Helpers::transformNumFloat(EMS_VALUE_ULONG_NOTSET - 1, numeric_operator);
         return true;
     }