diff --git a/furnace/furnace_top.lua b/furnace/furnace_top.lua
index 1b70eee..6e0dafc 100644
--- a/furnace/furnace_top.lua
+++ b/furnace/furnace_top.lua
@@ -242,7 +242,12 @@ local tubing = {
 		end
 	end,
 	on_recv_message = function(pos, src, topic, payload)
-		return CRD(pos).State:on_receive_message(pos, topic, payload)
+		if topic == "output" then
+			local nvm = techage.get_nvm(pos)
+			return string.split(nvm.output or "unknown", " ")[1]
+		else
+			return CRD(pos).State:on_receive_message(pos, topic, payload)
+		end
 	end,
 }
 
diff --git a/manuals/ta4_lua_controller_EN.md b/manuals/ta4_lua_controller_EN.md
index 0db0d14..3faab69 100644
--- a/manuals/ta4_lua_controller_EN.md
+++ b/manuals/ta4_lua_controller_EN.md
@@ -364,11 +364,12 @@ Please note, that this is not a technical distinction, only a logical.
 | "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, silo, accu, or battery block, or from the Signs Bot Box. Silo and tank return two values: The percentage value and the absolute value in units.<br /> Example: percent, absolute = $send_cmnd("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                                       |
+| "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 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 = $send_cmnd("223", "itemstring", 1) |
+| "output"     | recipe output string, <br />e.g.: "default:glass"            | Only for the Industrial Furnace. If no recipe is active, the command returns "unknown" |
 
 
 
diff --git a/manuals/ta4_lua_controller_EN.pdf b/manuals/ta4_lua_controller_EN.pdf
index 7469d82..1127fdf 100644
Binary files a/manuals/ta4_lua_controller_EN.pdf and b/manuals/ta4_lua_controller_EN.pdf differ
diff --git a/tools/repairkit.lua b/tools/repairkit.lua
index 9c32af7..ea1a850 100644
--- a/tools/repairkit.lua
+++ b/tools/repairkit.lua
@@ -245,6 +245,11 @@ local function read_state(itemstack, user, pointed_thing)
 					fuel = dump(fuel)
 					minetest.chat_send_player(user:get_player_name(), ndef.description.." "..number..": fuel = "..fuel.."    ")
 				end
+				local output = techage.send_single("0", number, "output", nil)
+				if output and output ~= "" and output ~= "unsupported" then
+					output = dump(output)
+					minetest.chat_send_player(user:get_player_name(), ndef.description.." "..number..": output = "..output.."    ")
+				end
 				local load, abs = techage.send_single("0", number, "load", nil)
 				if load and load ~= "" and load ~= "unsupported" then
 					load, abs = dump(load), abs and dump(abs) or "--"