Dual Audio Presence Detector. NOTE--Requires PS-51212 or ILPS-51212 Power Supply!

Login for your best price

The DAPD-01 Dual Audio Presence Detector senses the presence of audio and activates alarms, or other equipment, if audio drops below a desired threshold for a user-determined period of time (from five seconds to five minutes). Independent monitoring and activation controls are provided for the left and right channels of a stereo signal, or the monitoring of two mono signals.


Use the DAPD-01 for:


Broadcast Facilities

The DAPD-01 can be used for trouble-shooting and monitoring of stereo or mono audio for radio, television, cable and satellite broadcasts at the studio, transmitter, uplink/downlink sites and more. The DAPD-01 can also be used to provide status inputs to the Davicom remote monitoring & control unit.


Museums, theme parks and public transportation facilities

The DAPD-01 will monitor unattended audio feeds, such as background music or automated announcements, and will automatically switch to a back-up source if the audio is lost. A "time-out" setting of up to five minutes keeps the unit from switching during normal gaps in audio.



Audio Input Level -10 to +15 dBm, 10 kOhms balanced bridging, adjustable
Sampling Time Adjustable from 5 to 300 seconds
Relay Operating Threshold Adjustable from 25 to 50 dB below peak audio
Indication of Audio Presence Front Panel LED
Outputs on Loss of Audio

DPDT Relay Contacts, 120 V, 0.25 A, TTL Output, Standard 5 VDC

Memory DC Output Normalized at 5 VDC for 5 V of peak audio
Power Requirements

+12 VDC Regulated, 50 mA

- 12 VDC Regulated, 20 mA


Connectors (Input & Output)
Weidmuller, BL2 Series
Operating Temperature
+40°F to 104°F
+5°C to 40°C
1 5/8 x 4 1/4 x 12 in (H x W x D)
4.1 x 10.8 x 30.5 cm


Scientel Rack-Mount Tray to mount up to four units in a single rack space

Before browsing our website, please accept our cookie policy.