ARC Raiders Flow Controller and Geiger Counter Locations: Best Route

Stella Montis is the most practical map for farming Flow Controllers and Geiger Counters in ARC Raiders. Players looking for a Flow Controller should prioritize the northern offices in Assembly Workshops and the laboratories in Medical Research. Those hunting Geiger Counters should begin around Assembly Line, Assembly, and Workshops before checking the Auditorium if their first sweep comes up empty.

Both items are rare Exodus recyclables, and neither has a guaranteed spawn location. That makes route planning more important than repeatedly checking one container. A focused run can help players complete Tian Wen's Snap And Salvage quest or collect the three Geiger Counters required for Trophy Display Stage 5 without spending unnecessary time inside dangerous areas.

Best Flow Controller and Geiger Counter Locations

The following locations are the main priorities when searching Stella Montis. Treat them as areas with reported loot opportunities, not guaranteed item spawns.

Stella Montis unlocks after players have completed 24 rounds. If the map is not available in the selection screen yet, that progression requirement is worth checking before planning a dedicated farming session.

Best Farming Route for Flow Controllers

Flow Controllers are particularly important for Tian Wen's Snap And Salvage quest, which requires one Flow Controller and one Magnetron. The item is not tied to a single fixed cabinet, so searching several suitable containers is more reliable than rushing toward one supposed spawn point.

1. Start With Assembly Workshops

Assembly Workshops is a strong first stop, especially when your spawn allows you to reach its northern section quickly.

Search the offices at the northern end of the Workshops. Check the blue and white filing cabinets on the lower floor, then inspect the upper-floor offices. Pay attention to drawers and nearby work areas rather than opening only the largest containers.

The surrounding Workshops are also worth checking for Geiger Counters. Search tool stands, small cabinets, filing drawers, and breachable containers before moving on.

If you find the Flow Controller needed for Snap And Salvage, consider extracting instead of continuing deeper into the facility. Once the required item is secured, additional searching creates more opportunities to lose it without necessarily improving quest progress.

2. Move to Medical Research

If Assembly Workshops has already been looted or produces nothing, Medical Research is the next priority.

Enter from the Loading Bay side and head toward the glass-walled laboratories on the upper floor. Search Research Laboratory 3 first, followed by Laboratory 1.

Check medical drawers, white cabinets, carts, workbenches, and consoles. These areas provide several different container types to inspect, which is useful when a particular room has already been cleared.

Medical Research can be dangerous because of the ARC presence. Avoid spending too long searching an empty room, especially when you already have the item you came for.

Best Farming Route for Geiger Counters

Geiger Counters are required in greater quantities than Flow Controllers. Players need three for the fifth stage of the Trophy Display project, where the donation rewards an Aphelion battle rifle.

1. Prioritize Assembly Line, Assembly, and Workshops

For Geiger Counter farming, focus on the northern facility areas first. Assembly Line, Assembly, and Workshops provide a practical search circuit without requiring an immediate trip across the entire map.

Inspect yellow and white tool stands, small blue cabinets, filing drawers, and breachable server cabinets along the walkways and inside nearby rooms.

Once the first sweep is complete, check whether the surrounding areas have already been looted. If you still need Geiger Counters, extend the route toward the Auditorium. It offers another set of searchable containers and is a reasonable secondary stop when the main Assembly areas do not produce anything.

Players collecting all three Geiger Counters should expect to make multiple runs. There is no guaranteed container that will provide the full project requirement in one visit.

2. Use Lobby and Business Center as Optional Stops

The Lobby and Business Center are useful extensions when the main farming areas have been cleared.

At the Lobby and Security Checkpoint, inspect security lockers, crates, and loose items on furniture. Do not limit your search to containers alone: reported finds include items sitting on open surfaces.

The Security Checkpoint also matters for Snap And Salvage, which includes a separate objective to search papers in the room. Completing that step while passing through the Lobby can save a later trip.

Business Center is another option for searching office desks, cabinets, and other Exodus-related containers. If the area is already empty or heavily contested, moving toward extraction may be more valuable than completing a full facility sweep.

Standard Raids or Night Raids?

The choice depends on whether you value safer repeated attempts or potentially better loot opportunities.

For a solo player who only needs one Flow Controller, a short Standard Raid is often the more practical approach. The priority is securing the quest item and extracting safely, not maximizing the number of rooms searched.

Night Raids may appeal to players hunting multiple valuable items, but the added danger makes them less forgiving. Identify an available extraction point before entering the busiest areas, and do not assume every normal extraction option will be available.

Which Items Should You Keep, Recycle, or Sell?

Both items have uses beyond their immediate quest or project requirements. Keeping the right amount can prevent another farming trip later.

A Flow Controller is also required to craft the Polished Stash Outpost furniture, alongside 15 Sheet Metal and the required design unlock. If you intend to build it, keep an additional Flow Controller after completing Snap And Salvage.

Geiger Counters should be kept until you have donated the required three for Trophy Display Stage 5. After that, spare copies can be recycled for Batteries and an Exodus Module or sold for Coins, depending on which resources you need more.

Both items weigh 1.5 kg and stack up to three. In-raid salvaging provides fewer materials than full recycling: a Flow Controller gives two Mechanical Components, while a Geiger Counter gives three Batteries. If you have a compatible Safe Pocket, securing a rare item there can reduce the risk of losing it before extraction.

Farming Mistakes to Avoid

Searching Only One Type of Container

Stella Montis received an Exodus recyclable loot distribution adjustment in Update 1.26.0. The change spread these materials more evenly across containers, making it less useful to focus on one specific cabinet or drawer.

Search filing drawers, tool stands, medical storage, breachable cabinets, and other suitable containers. No individual container guarantees a Flow Controller or Geiger Counter.

Completing the Entire Route Every Raid

A full facility sweep is unnecessary when you only need one Flow Controller. If you find it early, consider extracting immediately.

For Geiger Counters, prioritize Assembly Line, Assembly, and Workshops before extending toward Auditorium or Medical Research. Adapt the route to your spawn, nearby enemies, and the areas other Raiders have already searched.

Recycling Quest and Project Materials Too Early

Do not recycle your first Flow Controller before completing Snap And Salvage. Keep another if you intend to craft Polished Stash furniture.

Likewise, save three Geiger Counters for Trophy Display Stage 5. Only consider selling or recycling the surplus after those requirements are covered.

The most efficient ARC Raiders items farming strategy is not necessarily the longest route. It is the one that gets the required materials into your inventory and out of the raid safely.