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Heartbeat Sensor — Tactical specifications

Heartbeat Sensor in Modern Warfare 4: tactical specifications, source description, magazine options and explicitly unmeasured combat statistics.

10/19/2026 MW4 Wiki Team Last updated: 10/23/2026 5min read

FAQ

What is the Heartbeat Sensor in Modern Warfare 4?
The supplied record lists Heartbeat Sensor as a tactical item. The caliber field is not stated.
Are Heartbeat Sensor damage and recoil measured?
No. Damage, RPM, TTK, recoil and effective range remain unpublished until in-game verification with the Benchmark Tool after the October 22, 2026 launch. Measurements must include the patch version.

Heartbeat Sensor at a glance

The Heartbeat Sensor is a Tactical item described as a battery-powered tablet displaying nearby enemy locations. It supplements direct observation with location information. Snapshot Grenade is its closest documented alternative: another Tactical entry, but one described as a momentary glimpse for the team. Neither item’s description supplies detection distances or timings, so the choice can currently be explained by the wording and presentation rather than a performance ranking.

Masked gunmen fire from a moving sedan on a French city street.
Masked gunmen fire from a moving sedan on a French city street. Campaign context only; the screenshot does not identify Heartbeat Sensor. Screenshot © Activision / Infinity Ward, via Steam. Used for editorial commentary; not an endorsement.

Specifications

These fields are transcribed from Heartbeat_Sensor.txt in the supplied weapon database. Not stated means the record supplies no value; it does not mean zero or confirmed unavailability.

FieldValue
ClassTactical
CaliberNot stated
Magazine (base)Not stated
Magazine attachmentsNot stated
Fire modeNot stated
Ammo typeNot stated
ManufacturerNot stated
Console codenameNot stated
Source recordHeartbeat_Sensor.txt

In-game description

Battery-powered tablet that displays nearby enemy locations

Battery-powered describes the device’s power source. It does not establish a battery capacity, recharge rule, depletion rate or maximum number of scans. Displays nearby enemy locations identifies the intended information role, without saying whether the display is continuous, periodic or activated by a button. Nearby is marketing wording rather than a measured radius. The description also does not establish whether the displayed information is shared with teammates or only seen by the person holding the tablet.

How it fits the class

There are two Tactical entries in the supplied database. Snapshot Grenade explicitly mentions a momentary glimpse and the team; Heartbeat Sensor explicitly mentions a tablet and a battery. That supports distinguishing a displayed-information tool from a described team reveal, but not claiming that one lasts longer, reaches farther or sees through particular surfaces.

The sensor also has a different purpose from the Night Vision Goggles covered in the equipment list. That reference describes low-light visibility; this record describes enemy locations. Treat them as tools answering different questions rather than assuming either replaces the other. Compatibility with carrying both, countermeasures and visibility through obstructions are not documented here.

For an information check, a displayed location can guide where to look next; it does not by itself establish a clear route or an exposed target. Communicating what the tablet actually shows is a sensible use of its stated role while team sharing remains unspecified. Conversely, an empty display should not be treated as proof that an area is safe, because the record supplies no detection conditions or exceptions.

Ammo and supply

Ammo type is Not stated. This record supplies no firearm magazine, ammunition pool or battery inventory, so a Heavy, Light or Sniper Ammo pickup cannot be described as powering the tablet. Battery-powered does not mean an unlimited resource, but it also does not establish a consumable item that must be scavenged.

For planning, separate access to the sensor from the information it might display. A mode’s equipment rules would need to establish how the tablet is obtained or replaced; the item description alone cannot do that. The equipment mechanics reference covers shared systems, while battery replacement, recharging, pickup locations and replenishment for this particular sensor remain not stated.

Magazine options

Base magazine and magazine attachment capacities are Not stated. Neither is a useful substitute for the missing battery details. A firearm capacity measures rounds; the source supplies no equivalent count of scans or activations for this tablet. The empty firearm fields remain visible in the specifications so readers can distinguish an absent value from a measured zero.

The practical information to look for in future documentation is the activation method, battery behaviour and replacement rules. Those would explain how often a player can consult the device. They cannot be inferred from the existence of a battery or filled with values from earlier Heartbeat Sensors in other Call of Duty titles.

Gunsmith attachment slots

Muzzle, Barrel, Laser, Optic, Magazine, Rear Grip, Stock, Underbarrel, Ammunition and Apex are the shared firearm Gunsmith categories. No attachment support is established for this tablet. In particular, an Optic category on a gun does not imply a sensor display upgrade, and an Ammunition category does not imply a battery upgrade.

The Gunsmith overview explains how firearm levels and builds relate. It should be read as system context here, not as an upgrade tree for Heartbeat Sensor. An equipment-specific modification would need its own name, effect and unlock source before it could appear as a recommended option on this page.

What is not measured yet

Source descriptions above remain attributed claims. With the game now released, verification still needs the patch version, mode and configuration so that later changes can be checked against the same conditions.

How to unlock it

The sensor’s unlock requirement is Not stated. Weapon levels and Blueprints are documented firearm systems, but the supplied record does not connect either one to this Tactical item. No player level, challenge, mission reward or equipment progression track is given.

The Vault Edition guide lists the Inner Circuit pre-purchase Weapon Blueprint and five Signature Weapons without naming this sensor. Those bonuses do not establish an acquisition path for the tablet. The customization guide separately covers cosmetics and challenges; cosmetic progression should not be mistaken for an equipment unlock. Future acquisition instructions need an item-specific requirement and mode.

Other entries in this class

Snapshot Grenade

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