ESM97 BASE SOUNDERImproved electronic design and the use of a new, custom designed piezoelectric transducer have enabled current consumption to be reduced to as little as 6mA at 24Vdc. There is a local volume switch on each unit to allow individual sounders to be increased as necessary to suit every application.

The 32 tone version has all the major worldwide tones including AFNOR, DIN and NEN spec tones. With a wide operating frequency range of 440Hz to 2900Hz, the installer has maximum flexibility. The tone list matches
the popular ES103 spatial sounders allowing a uniform sound across the installation.

The standard 24Vdc units operate from 18 – 30Vdc. Standard on all ESM97 products is a second stage alarm allowing alert and evacuate signals to be switched via the CIE. If the unit is not being used in conjunction with a detector, a lockable cover plate can be fitted to convert the unit into a stand-alone wall or ceiling mounted sounder.



  • Low current Sounder technology
  • 32 tones available
  • Tones match ES103 Sounder Beacon
  • Colour matched sounder for mounting Hochiki conventional detection
Sounder Low current mode/ Sound Output @ 1m6mA @87 dBA
Sounder Med current mode/ Sound Output @ 1m8mA @90 dBA
Sounder High current mode/ Sound Output @ 1m10mA @93 dBA
Voltage Range18-35 VDC
Frequency Range440Hz to 2900Hz
Number of Tones32
IP RatingIP 21C
Operating Temp. Range-20°C to + 70°C
Maximum Humidity95%RH – Non Condensing (at 40°C)
Case MaterialABS
Height with Base25mm
Base Fixing Centers48mm through to 74mm