diff --git a/basis/liquid_lib.lua b/basis/liquid_lib.lua
index 6801070..6bc3a54 100644
--- a/basis/liquid_lib.lua
+++ b/basis/liquid_lib.lua
@@ -55,7 +55,9 @@ techage.liquid.recv_message = {
 	on_recv_message = function(pos, src, topic, payload)
 		if topic == "load" then
 			local nvm = techage.get_nvm(pos)
-			return techage.power.percent(LQD(pos).capa, (nvm.liquid and nvm.liquid.amount) or 0)
+			nvm.liquid = nvm.liquid or {}
+			nvm.liquid.amount = nvm.liquid.amount or 0
+			return techage.power.percent(LQD(pos).capa, nvm.liquid.amount), nvm.liquid.amount
 		elseif topic == "size" then
 			return LQD(pos).capa
 		else
diff --git a/liquids/silo.lua b/liquids/silo.lua
index 25be282..5e809d2 100644
--- a/liquids/silo.lua
+++ b/liquids/silo.lua
@@ -309,7 +309,7 @@ techage.register_node({"techage:ta3_silo", "techage:ta4_silo"}, {
 			local nvm = techage.get_nvm(pos)
 			nvm.item_count = nvm.item_count or get_item_count(pos)
 			nvm.capa = nvm.capa or get_silo_capa(pos)
-			return techage.power.percent(nvm.capa, nvm.item_count)
+			return techage.power.percent(nvm.capa, nvm.item_count), nvm.item_count
 		else
 			return "unsupported"
 		end
diff --git a/manuals/ta4_lua_controller_EN.md b/manuals/ta4_lua_controller_EN.md
index 2cca94e..aa97019 100644
--- a/manuals/ta4_lua_controller_EN.md
+++ b/manuals/ta4_lua_controller_EN.md
@@ -358,12 +358,12 @@ In addition to Lua standard function the Lua Controller provides the following f
 | "state"      | one of: "empty", "loaded", "full"                            | State of a chest or Sensor Chest                             |
 | "fuel"       | number                                                       | fuel value of a fuel consuming block                         |
 | "depth"      | number                                                       | Read the current depth value of a quarry block (1..80)       |
-| "load"       | number                                                       | Read the load value in percent  (0..100) of a tank/storage block, a silo block, an accu block, or of the Signs Bot Box. |
+| "load"       | number                                                       | Read the load value in percent  (0..100) of a tank/storage block, a silo block, an accu block, or of the Signs Bot Box. Silo and tank return two values: The percentage value and the absolute value in units.<br /> Example: percent, absolute = $read_data("223", "load") |
 | "delivered"  | number                                                       | Read the current delivered power value of a generator block. A power consuming block (accu) provides a negative value |
 | "action"     | player-name, action-string                                   | only for Sensor Chests                                       |
 | "stacks"     | Array with up to 4 Stores with the inventory content (see example) | only for Sensor Chests                                       |
 | "count"      | number                                                       | Read the item counter of the TA4 Item Detector block         |
-| "count"      | number of items                                              | Read the total amount of TA4 chest items. An optional  number as `add_data` is used to address only on inventory slot (1..8, from left to right). |
+| "count"      | number of items                                              | Read the total amount of TA4 chest items. An optional  number as `add_data` is used to address only one inventory slot (1..8, from left to right). |
 | "itemstring" | item string of the given slot                                | Specific command for the TA4 8x2000 Chest to read the item type (technical name) of one chest slot, specified via `add_data` (1..8).<br />Example: s = $read_data("223", "itemstring", 1) |
 
 
diff --git a/manuals/ta4_lua_controller_EN.pdf b/manuals/ta4_lua_controller_EN.pdf
index 87dc030..39d8dce 100644
Binary files a/manuals/ta4_lua_controller_EN.pdf and b/manuals/ta4_lua_controller_EN.pdf differ