Hand Operated Sirens LK-100A type Hand Grand Fire alarms

  Manual alarm without power supply,but can provide an effective alarm in the place that without power supply.Simply shake the handle clockwise through artificial hand,speed arrive junior (50-80 rev / min) can achieve the desired effect alarm,the sound sharp,shocking large, penetrating power.Alarm sound depends on the handle speed of shaking. Handcranked siren small size,light weight,easy to carry,easy to install,does not require any tools,Only need 0.15 square and where people stood can normal operation ,the mobility of the job is very strong. It is an ideal Alarm equipment when Civil defense,military, detention centers,prisons,mines,airports,pastures,oil depots,warehouses, hotels,restaurants and other business units Critical situation occurs.     Specification 

Sound Rating: 
110±2dB(A) @1M 
Output Frequency: 
550±20Hz (Dependent on Rotation Speed)
Sound range:1000m 
Net Weight: 
1.3Kg 
Carton Size: 
290*190*170mm                                         Used for emergency warning,easy to carry,mainly used in flood control,disaster,forest fire,military military supplies,public and industrial applications to respond to emergencies alarm use. Principle The principle of traditional manual alarm is the application of shock sensors,auto alarm sensors work once accept vibration signal .As a result , thunders and rains,or touches of dogs and cats , even car alarms of other cars nearby,can cause alarm reaction . The principle of manual  alarm is turning the crank ,the gear box of  progressive transmission ,through the transmission block driving wheel at high speed .In the process of high speed , high speed and high pressure to set the wheel on absorption of air fixed window of resonance in extrusion and at the same time, to play the role of alarm. Becasue it is manual alarm , the primary speed determines the sound effect of the alarm. The speed and the sound effect is proportinal , relatively speaking , the higher the speed , the greater the sound . There are some differences from man to man to shake the alarm. The height ,  strength ,shaking speed of the man who shake the alarm influences the alarm sound effect. So we are here for macro regulation ,the primary speed of shaking should not less than 90r/min, otherwise it will not sound effect.    Operation & Maintenance    1 The operation of manual alarm need one man only . While alarms at work , the wheel inside is working at high speed ,generally more than  2000r/min , Don't put your fingers or other foreign body into  the wheel inside, otherwise it will cause personal injury or cause damage to the alarm. 2 Juveniles are not alllowed to use manual alarms. 3 the alarm require regular maintenance to keep normal operation.If alarm fails to operate properly , arrange for an experienced mechanics or directly contact the company .  

     Cangzhou Bohai Safety&Special Tools Group Co.,Ltd-a famous and professional manufacturer.,established in 1978.We can produce over 300 kinds and nearly 10,000 dimensions including non-sparking tools,special tools,non-magnetic tools,terrace measure tools,hardware forged products and lather bed.
     Our non-sparking tools are mainly used in hazardous environment where flammable and combustible vapors liquids gas dusts
are present such as petroleum industry,chemical industry,power generation,railroad,and mining etc.Our products sell over 31
provinces and autonomous regins and directly exported to foreign counties,such as Middle East,Europe,South Africa,
Southeastern Asia.
     Our company interested with the principle that"Customer is God"and would like to cooperate with all of the customer with high-quality products and excellent after-sale service.                                                                               1.Any Inquires will be replied within 24 hours 2.Professional manufacturer welcome to visit our website:ccctools.com 3.OEM/ODM available 4.High quality 5.After-sale services:  1).All products with have been strictly quality checked in house before packing  2).All products will be well packed before shipping 6.Faster delivery:   Sample order in stok and 3-5 days for bulk production 7.Payment:   You can pay for the order vid:T/T,Westem Union 8.Shipping:   We have strong cooperation with DHL,TNT,UPS,FEDEX,EMS,China Air Post,you also can choose your own shipping forward