Resident Evil 4 Remake: How To Get Thermal Scope 

Catch enemies in sight before they can see you with the Thermal Scope in Resident Evil 4 Remake!

RE4 Remake has a few weapon attachments mounted on the best weapons to help them serve another purpose. The Resident Evil 4 Remake Thermal Scope is one of them, which can be mounted on a few weapons, and players might need assistance figuring out how to get it!

Important: Players can use the Thermal Scope to thermally image opponents, mount it on a compatible weapon and assassinate enemies.

Key Takeaways
  • The Resident Evil 4 thermal scope is also known as the Biosensor Scope
  • The main purpose of the thermal scope is to be mounted onto a compatible weapon and be used to zoom into opponents or items far away and thermally image them.
  • Once the virus or plagas parasite is scanned, you can shoot it and kill enemies that are otherwise impossible to kill.  
  • Weapons like the SR M1903LE5CQBR AR, and Stingray are compatible with the Biosensor scope. 
  • In order to get their hands on the Biosensor Scope, players need to follow these steps:
    1. Players first need to divert power towards the Dissection Room, which requires interacting with two power control levers.
    2. After the power has been diverted, the grated gate ends up opening up.
    3. From here, players need to calibrate the puzzle that is present in the Dissection Room, where the puzzle has three lines and needs to have its nodes supply power in the correct direction.
    4. Players then need to get the level 1 keycard which is placed on a small cart towards the back of the room.
    5. After that, players need to divert the power to Freezer, interact with its lever, swipe the level 1 keycard, and gain access to the Freezer room.
    6. Another calibration puzzle with 4 lines awaits them and is placed towards the right side of the entrance in the room against a wall.
    7. After that, go to the Incubation Lab, head to the back of the room with the broken window, and towards the right of the 2002 Case File, the Biosensor Scope is present. 
  • Players can use the Thermal Scope by selecting it from inventory and mounting it on any weapon that is usable with it. 

Our video breaks down how to get thermal scope & we believe it’d be easy for you to learn step-by-step method of how to get the Biosensor scope in RE4 Remake from it. 

Basic Info 

Biosensor Scope
Biosensor Scope (Image Credits Exputer)

First things first, alongside other weapon attachments, the Biosensor is one that doesn’t really serve all that much of a purpose other than as a scope. 

  • The main reason players might want to get the Biosensor scope is to gain thermal imaging of the area or creature that is present infront of them.
  • It is described to be a scope that can be used with any weapon or gun that can use it. 

How To Get The Thermal Scope 

Map Location
Map Location (Image Credits Exputer)

First, if players want to get their hands on the Resident Evil 4 Remake Thermal Scope, they need to make a detour and go through the Incubation Lab, where they require a Level 2 Keycard to grant access to it inside. Let’s go into complete detail about how players can locate it. 

Dissection Room Power Diversion 

Map Location
Map Location (Image Credits Exputer)

One of the main things players will need to do is dissect power to the Dissection room, where players need to head into but can’t without the diversion of power. 

First Lever
First Lever (Image Credits Exputer)
  • On the map, it can be seen that players need to first head toward the far bottom right, where a power control lever is located.
  • Head towards the red level with the yellow handle, and players can easily interact with it, and with that, they can bring it down. 
Cutscene Triggers
Cutscene Triggers (Image Credits Exputer)
  • This triggers a cutscene showcasing power being diverted to another part of the room. 
Door To Your Left
Door To Your Left (Image Credits Exputer)
  • From here, turn around, face the door towards your left, and head right through it. 
Power Lever In Room
Power Lever In Room (Image Credits Exputer)
  • As you do so, you enter another room where the power was diverted, and there is another power control lever beside the grated bars towards the far left of the room.
  • Approach the lever, and interact with it to bring it down, and the red light turns green
Grated Doors
Grated Doors (Image Credits Exputer)
  • Diverting the power here unlocks the grated doors. 

Puzzle In Dissection 

From here, players will be able to locate a puzzle that they need to solve. Once you enter the Dissection room, towards the far end, there is a puzzle machine beside a set of blue separators

  • Get closer to it, and you should be able to interact with it easily. 
  • The puzzle can get quite confusing if you don’t already know the ins and outs of it. Therefore, below is a simple explanation of how these puzzles work so players can figure them out beforehand. 
T Nodes
T Nodes (Image Credits Exputer)

The nodes throughout the puzzle are essentially how players can let power divert through the lines.

  • Players must divert the power from the main source, present at the top, from where it starts to flow and travels through the green lines. 
  • Alongside the green lines, there are also dotted and stable green lines, the dotted ones showcasing no power diversion occurring, while the stable green lines show the power flowing through that particular line. 
Total Nodes In Corner
Total Nodes In Corner (Image Credits Exputer)
  • On the top right, a node counter conveniently calculates the total nodes players need to activate and have activated. 
  • The main goal of these puzzles is to provide enough power, and when it’s done, the calibration can occur. 

Now, for the Dissection puzzle, there are a total of 3 lines that are present on the puzzle that needs the power to diverge. Here’s how players should solve it. 

First Line
First Line (Image Credits Exputer)
  • For the first line, players need to switch the top T node towards the right side, while the symbol present towards the right must be facing down. With that, the symbol on the bottom must be facing the left, and the symbol on the left must be facing the right. 
Second Line
Second Line (Image Credits Exputer)
  • For the second line, the T node on the bottom must face down, while the one on the left must face the right. Alongside that, the symbol on top should be facing left, and the symbol on the right should also be facing left. 
Third Line
Third Line (Image Credits Exputer)
  • The third line features a different symbol on the bottom that doesn’t need to be interacted with. The T node on the left should face up, while the T node on the top should face the left. With that, the T node on the right should also face up. 

Level 1 Keycard  

With that puzzle out of the way, players will be able to get their hands on the first keycard and, alongside that, also get a little closer to getting the Resident Evil 4 Remake Biosensor Scope.

Open Door
Open Door (Image Credits Exputer)
  • After the puzzle has been solved, the door next to it opens and the heads inside. 
Level 1 Card
Level 1 Card (Image Credits Exputer)
  • Run to the back of the room, where a small cart is present, and the level one card is on top of it and can be collected.
Opponent Awaits You
Opponent Awaits You (Image Credits Exputer)
  • From here, turn back around and head outside the door, where an opponent awaits you, and you need to eradicate it. 

Freezer Room Power Diversion And Puzzle 

After this, players need to then head over to the freezer room, but the place also needs to get power first, so follow these quick steps to get it going: 

  • Turn up the first lever that you see. 
First Lever Turning
First Lever Turning (Image Credits Exputer)
  • Head back through the metal doors and then through the corridor, and there should be a machine on which you can swipe your keycard
Through Metal Gates
Heading Through Metal Gates (Image Credits Exputer)
  • Interact with the machine, through which you can select your level 1 keycard. Swipe it, and it should open the door to the freezer room.  

Moving on, the next thing that players will want to solve to get the Resident Evil 4 Remake Thermal Scope is the puzzle that is located inside the freezer room once you make your way there. 

  • Heading inside the room, the puzzle should be located right as you enter the room and pan your camera to the right. The puzzle will be pressed against a wall, waiting to be calibrated. 
Puzzle Against The Wall
Puzzle Against The Wall (Image Credits Exputer)
  • As you head closer to the puzzle, you can interact with it, which activates it. 
  • This time, the puzzle has 4 lines that players need to divert the power towards, and as usual, the power diversion starts from the top. There are also 5 nodes where the power needs to be supplied, which can be counted from the node counter at the top right. 
First Line
First Line (Image Credits Exputer)
  • Regarding the first line, the top Tnode must be facing down. With that, the symbol on the right must be facing up, the T node at the bottom should be facing right, and the T node on the left should be facing right too. 
Second Line
Second Line (Image Credits Exputer)
  • As you approach the second line, the symbol on the top must face right, as does the symbol on the right. The symbol on the bottom must face up, and the T node on the left should face down. 
Third Line
Third Line (Image Credits Exputer)
  • For the third power line, the T node on the top should face left, the symbol on the right can’t be interacted with, the T node on the bottom should face down, and the one on the left should face left too. 
Fourth Line
Fourth Line (Image Credits Exputer)
  • For the final power line, players must have the top T node face left, both symbols on the right and bottom face right, and the T node on the left should face right. 
  • When the puzzle is solved, players should be able to also get their hands on the LE5 weapon, which is pretty solid. 

Heading To Incubation Lab 

With that, the final thing players must do to obtain the Resident Evil 4 Remake Thermal Scope is to make their way over to the Incubation Lab

Map Location
Map Location (Image Credits Exputer)
  • The incubation lab is towards the far-right room on the map, located towards the right of Facility 1 storage on the map as well. 
  • As players head inside the incubator lab, they should be able to see two giant tubes with creatures placed. 
Back Of The Lab
Back Of The Lab (Image Credits Exputer)
  • From there, players need to head toward the very back of the lab, where there is a broken window that players can go towards. 
Biosensor Scope
Biosensor Scope (Image Credits Exputer)
  • Interact with the space there, allowing you to enter the room, and a table is at the back. 
  • The Biosensor scope is present beside a 2002 case file and can be interacted with, and once you do so, you can pick it up and add it to your inventory. 

How To Use Biosensor Scope

Scope Location On Map
Scope Location On Map (Image Credits Exputer)

When using the Biosensor Scope, getting to know the method is not all that difficult. 

  • Once you get the Scope in Resident Evil 4 Remake, open your inventory and pick it out from there. 
  • From your inventory, open the Biosensor scope option, and you should be able to attach it to a weapon of your choice.
Using Scope
Using Scope (Image Credits Exputer)
  • Once you do so, the next time that you use the weapon, it will display anything that is present infront of you as a thermal image instead of the typical image. 
Zooming (Image Credits Exputer)
  • It also zooms into anything that is infront of you, and you can zoom into items a bit more too. 

Which Weapons Is The Scope Compatible With? 

Last but not least, there are a total of 4 weapons with which the Scope is compatible, and it doesn’t work with any other weapons in-game. 

  • One of the first weapons is the SR M1903 which is essentially a sniper rifle, and players are able to buy it from the merchant by spending a total of 12000 Pesetas. 
  • The CQBR AR also is compatible with the Scope, and players can get the weapon from a lockbox when they head into chapter 10. 
LE5 (Image Credits Exputer)
  • The Scope also works pretty well with the LE5, which already has the location mentioned before.
  • Lastly, the Stingray can be obtained from the merchant for a total of 30000 Pesetas and works with the Resident Evil 4 Remake Biosensor Scope


And there we have it! All that players need to know about the Resident Evil 4 Remake Thermal Scope, and with that, we will wrap up our guide! If you’ve wanted to catch the Lunker Bass, then you might want to read up on our Resident Evil 4 Remake Get Lunker Bass guide! Alongside that, you might also like our Resident Evil 5 Remake Striker Shotgun guide since it covers the location and how to get it!

With that, you can also check out our Resident Evil 4 Remake Best Charms guide so that you can know which ones to invest in! Lastly, our Resident Evil 4 Remake Mendez False Eye guide covers the entire boss fight with Mendez and getting the False Eye!

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Mina Anwar

Mina is a Gacha games guides writer at Exputer with years of writing experience. Xianzhou Luofu and Liyue Harbor are her second homes~ ~Jing Yuan/Mikito main <3

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