Howler TS-15 is designed for giving main and shunting

The TS-15 howler corresponds to TU3180-016-14816308-2007 "Tiphones, howlers and whistles signalling. Technical conditions"
Main technical data:
Frequency of sounding of the main tone of Tiphon, Hz370±10
Frequency of sounding of the main tone of the whistle, Hz650±50
Total sound pressure level of the Tiphon, dB (lin)120±5
Total sound pressure level of the whistle, dB (lin)105+10
Working pressure of compressed air of the Tiphon, MPa0,75-0,9
Working pressure of compressed air of Whistle, MPa0,75-0,9
Maximum compressed air pressure of Tiphon,MPa1,0
Maximum compressed air pressure of the Whistle,MPa1,0
Minimum compressed air pressure of the Tiphon, MPa0,5
Minimum compressed air pressure of the whistle, MPa0,5
Diameter of calibration holes in Tiphon's supply pneumatic pipelines, mm4
Diameter of calibration holes in the supply pneumatic lines of the Whistle, mm4
Weight, kg ±5%8,5