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Rate of Rise Sensor

G E N E R A L   I N F O R M A T I O N

The Rate of Rise Sensor can be placed up to 2000 feet

away from the tattletale

TM 

base unit depending on structures

and objects in-between the sensor and the tattletale.  

A temperature increase of 15°F or more per minute activates  

the rate-of-rise feature and transmits an alarm to the tattletale.

Additionally, if the ambient temperature rises above 194°F,

the fixed temperature element will activate, the center disk

will fall free from the sensor, and will transmit an alarm to the

tattletale. It can effectively detect change of heat in an area up

to 2,500 ft. It will operate at temperatures from -22°F to 150°F.  

The 3V CR123A battery included with the Rate of Rise Sensor  

will typically last 2-3 years.

I M P O R TA N T:

YOUR tattletale™ BASE UNIT DOES NOT NEED
TO BE ARMED TO SEND AN ALARM FROM ANY
FIRE SENSORS, INCLUDING YOUR RATE OF RISE
SENSOR.

PLEASE CALL 1-888-835-5668 OR USE TEST DRIVE 
FUNCTION TO PLACE YOUR ACCOUNT ON TEST 
BEFORE TESTING OR SERVICING YOUR RATE OF RISE 
SENSOR IN ANY WAY. FAILURE TO DO SO CAN CAUSE 
DEPLOYMENT OF THE FIRE DEPARTMENT.

General Troubleshooting

1.

 When there is an issue with your Rate of Rise sensor 

(or one of your other sensors), the tattletale base unit 
will display a message on its screen which says either 

“Sensor Open”

 or 

“Other Issues.”

 If you see either of 

these messages displayed, press 3 on the keypad, then 

enter your 4-digit PIN to get more information about 
what is going on with the sensor.

2.

 

If the Rate of Rise Sensor’s status is 

“LOST,”

 verify that 

it is within range of the tattletale base unit and that the 

sensor has a working battery in the 

 

transmitter. If that doesn’t return it to normal status a 
tattletale signal booster might be needed.

3.

 

If the Rate of Rise Sensor’s status is 

“LOW BATTERY,”

 

replace the CR123A battery in its transmitter and press 

the black RESET button.

If the Rate of Rise Sensor was exposed to  
temperatures above 194°F and the sensor is 
constantly reporting open, it will need to be  
sent to tattletale for repair/replacement.

Instructions for mounting, testing and changing the battery,  

are located on the following pages.

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