20P 30 

• 30 Pounds Adjustable Low Water Pressure Detector, Works up To 60 Pounds 

20P 75

• 75 pounds Adjustable Low Water Pressure Detector, Works up to 150 Pounds 

A20P​

• 20P 30 Hermetically Sealed

ELK SP40 ​

• 40 Watt Speaker--- Use It With The MPI 11 for a 40 Watt Siren 

ELK SS15​

• 15 Watt Self-Contained Siren With 2 Sounds 106dB at 10 Feet 

ELK SS30​

• 30 Watt Self-Contained Siren With 2 Sounds 112dB at 10 Feet-- Each 3dB Double Loudness 

ELK-950 ​

• Telephone and Power Line Surge Suppressor

MPI 11

• Siren Driver to be Used With the ELK SP40

PTI 200 ​

• THERMALARM II "Normally Open" High and Low Temperature Detector With Thermometer

S 2300​

• 40 Watt Siren: Separate Siren Driver (MPI 11) & Wide Dispersion Speaker (ELK SP40) 114dB at 10ft 

Thermalarm III ​

• Hermetically Sealed "Normally Open" High and Low Temperature Detector With Thermometer ​

Therminder 2-L ​

• High/Low Digital Temperature Display with NO or NC Contacts and @ Lights - 12 VDC