Sensor Arrays: Clarifications

As promised last week, I’m tackling default sensor packages this week. It’s not really a houserule, since it’s simply filling something in that has been left open by the book. Still, the term houserule will suffice.

But first I should explain how sensor arrays work, because I’ve seen several people get horribly confused on page 445~446.


Sensor: A single Sensor uses 1 Capacity. A Sensor can be quite a lot, as seen in the Sensor Function table on page 446. It can be an atmosphere sensor, a MAD (metal) scanner, a camera and more.

Sensors can be put in quite a few things: There’s special Sensor RFID tags and ammunition, handheld housings, cyberlimbs, drones+vehicles, buildings and more.

Sensor Rating: A Sensor has a Rating, which can impact 3 different things. For some sensors the rating basically is irrelevant, such as motion sensors and atmosphere sensors.

  1. Limits for some tests done by/through the sensor, such as Sensor Attacks (p184, ALSO a confusing section that I judgement-called myself) and Perception by/through Drones(/Vehicles) (p270).
  2. Dicepool for tests, such as for Olfactory Scanners, MAD scanners, Cyberware Scanners and Radio Signal Scanners.
  3. For Cameras and Microphones, Internal Capacity for Vision/Audio Enhancements. So a Rating 3 Camera has 3 Capacity for vision enhancements such as Thermographic Vision and Flare Compensation.
  4. ((Electronics with an explicit Device Rating also are an exception to the electronics-device-rating-2 entry in the Device Rating table. So, assuming Sensor Rating = Device Rating, the rating (mostly matters for cameras) matters when it comes to hacking non-slaved sensors. But that’s not relevant here.))

Maximum Sensor Rating: Each type of Sensor Housing has a maximum as to how good a sensor you can fit in there. For example RFID Tags are limited at 2, Small(er) Drones at 3, a Motorcycle can handle rating 6 at the highest and a building can handle rating 8. So if you want to put Olfactory Sensors in your doors, they can be rating 8, costing 800 each. In a sneakily hidden Sensor Tag you can at most put a rating 2, costing 200 (+ 40 for the tag).

Sensor Array: A Sensor Array USES 6 Capacity, but it can contain UP TO 8 Sensors, each of which has a Sensor Rating equal to the Array’s Rating. So a Rating 5 Sensor Array contains 1~8 Sensors that all are Rating 5. If there’s 2 Cameras in there, each of them then is Rating 5 so has 5 Capacity.

6-Capacity-required means you can’t put a sensor array in a handheld housing, because that has at most 3 Capacity. The array requires 6. A cyberlimb can usually take it, but it will be a significant drain on your capacity. With vehicles/drones they already got a sensor array, which you can replace, so the required 6 Capacity isn’t a problem (unless Rigger V decides otherwise).

In return for taking 6 capacity for >6 namely 8 sensors, Sensor Arrays are slightly more expensive: They cost 10x as much as a single Sensor. So with 8 sensors you’d be paying 25% extra per Sensor basically, assuming you’re buying a new array that’s completely filled up.

Default Sensor Package: Vehicles and drones come factory-equipped with a Sensor Array, their stats note what the Array’s Rating is. The question is: what sensors are in that package? And THAT is the million-nuyen question. For that, see the accompanying houserule post here.

Upgrading Sensor Arrays: Now the book doesn’t state these things explicitly, but…

Since a lot of vehicles/drones can contain a better rating array than they come with by default (see Maximum Sensor Rating above), you can obviously purchase a better array for those. However, you got your sensors as an Array, with a Rating. So it’s not as simple as ‘just buy a better sensor and put it in the array’, because that makes the extra cost of arrays ridiculous.

So while it’s not stated explicitly, I interpret things myself akin to Cyberware enhancements: They have to be the same rating. If you want to add a Sensor to an Array that has space left, or replace a Sensor in an Array with another Sensor, the Sensor has to be the same rating as the Array already was. No stealth-updating or paying only 100 nuyen for a Sensor whose rating is irrelevant, if you’re putting it into a super-advanced Rating 8 Array.

Upgrading Sensors in Arrays: Another thing unmentioned is how you add enhancements to a Sensor you already have. For example, how do you add Thermographic Vision to a camera on your drone? Do you pay the addition costs? Add a mechanic fee, do an availability test for the new availability? Buy a brand new sensor? Or do you have to replace the entire array? There’s nothing in the rules that I can base an interpretation on, unfortunately, just like I have no idea if you can upgrade armor or goggles you already bought. Anyway, again see here for a houserule on that. 🙂

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