Potter PS-24 Photoelectric Smoke Detector

The Potter PS-24 Photoelectric Smoke Detector is a conventional smoke detector designed for compatible fire alarm and releasing systems. It uses an infrared LED light source and silicon photodiode to detect smoke particles entering its optical sensing chamber.

The PS-24 features a low-profile design, automatic sensitivity verification, dual bi-color status LEDs, magnetic functional testing, and compatibility with Potter SB Series detector bases. Potter now classifies the PS-24 as an obsolete product and identifies the CPS-24 as its replacement.

Product Functions

• Provides conventional photoelectric smoke detection
• Detects smoldering and flaming fires
• Uses infrared optical sensing technology
• Supports 2-wire and 4-wire detector bases
• Supports compatible relay bases
• Provides automatic sensitivity verification
• Provides dual bi-color status LEDs
• Includes magnetic functional test capability
• Provides RF and transient protection
• Uses a non-directional smoke chamber
• Provides vandal-resistant locking capability
• Uses a removable smoke labyrinth
• Compatible with Potter SB Series bases

Photoelectric Smoke Detection

The PS-24 uses an infrared emitting diode and silicon photodiode inside its smoke chamber.

During normal conditions, the photodiode receives essentially no light from the pulsing infrared source. When smoke enters the chamber, particles scatter light toward the receiving element.

The resulting optical signal is converted into an electronic signal and evaluated by the detector circuitry. When the required alarm criteria are reached, the detector enters the alarm state.

Automatic Sensitivity Verification

The PS-24 incorporates an automatic sensitivity window verification feature.

The detector continuously checks whether its smoke sensitivity remains within its listed operating range. If sensitivity drifts outside that range, the LEDs provide a local maintenance indication.

This helps identify detectors requiring cleaning or servicing.

LED Status Indication

The PS-24 incorporates two bi-color status LEDs.

Normal: Green LEDs flash approximately every 3 seconds

Sensitivity Trouble: Red LEDs flash approximately every 3 seconds

Alarm: Red LEDs remain continuously illuminated

The dual LEDs provide convenient local indication of detector condition.

Magnetic Functional Test

The PS-24 includes a built-in magnetic go/no-go test feature.

This allows technicians to perform a functional detector test without introducing smoke directly into the sensing chamber.

Detector Base Compatibility

The PS-24 is designed for compatible Potter:

SB Series Smoke Detector Bases

The SB Series supports 2-wire and 4-wire configurations as well as applicable relay-base options. Potter also documents the SB Series for use with the PS-24, PS-24H, and IS-24 detector families.

Electrical & Detection Information

Model: PS-24

Stock Number: 1430011

Device Type: Conventional Photoelectric Smoke Detector

Light Source: GaAlAs Infrared Emitting Diode

Rated Voltage: 17.7–33.0 VDC

Working Voltage: 15.0–33.0 VDC

Maximum Voltage: 42 VDC

Supervisory Current: 45 µA max. at 24 VDC

Surge Current: 160 µA max. at 24 VDC

Alarm Current: 150 mA max. at 24 VDC

Operating Temperature: 32°F to 120°F / 0°C to 49°C

Base: Potter SB Series

Status Indicators: Dual bi-color LEDs

Product Status

The PS-24 is an obsolete/discontinued product. Potter identifies the CPS-24 Conventional Photoelectric Smoke Detector as its direct replacement in form, fit, and function. The CPS-24 can use existing compatible bases, although panel compatibility should be verified before replacement.

PS-24 Datasheet