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NavKar Systems

Combo-CN158 Automatic School Bell Timer System with 12 inches Gong Bell.

Combo-CN158 Automatic School Bell Timer System with 12 inches Gong Bell.

Regular price Rs. 5,699
Regular price Rs. 4,499 Sale price Rs. 5,699
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Amazon price checked 28 Oct 2026; Amazon prices change often. All our prices include GST, with the same warranty and free support.

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  • Display: 32 Character digital display to show current date, time in 2nd row and next bell time in 1st row.
  • Stand-alone machine, no computers required to program or maintain ringing schedule.
  • Output Devices: Any electrical device which can operate with 220 volt AC like bell, hooter or siren can be connected.
  • No external battery required to maintain clock and stored program. Time accuracy is maintained in micro seconds. Weekly OFF features are also available that makes it amazing.
  • Modes: 3 Modes of operation (regular, winter, Examination ) to cover all seasons of year and special events like sports, examination, annual functions etc. 40 bells per day can be programmed in each mode. This is enough for two shift schools round the clock throughout the year
  • Model No:GBL-12+ASBS-01
  • This Package Includes
  • GBL-12=1pcs
  • ASBS-01=1pcs

NavKar Systems Combo-CN158

Specifications

An automatic school bell timer with a 12 inch electric gong bell. Set the bell times once on the timer and it rings by itself, with 3 modes and 40 bells per day in each mode. It needs no computer.

TimerASBS-01 automatic school bell controller
Display32 character digital display, current date and time in the 2nd row, next bell time in the 1st row
Modes3 modes: regular, winter, examination
Bells per day40 in each mode
Weekly offYes
OutputAny 220 V AC device such as a bell, hooter or siren
Clock backupNo external battery needed to keep the clock and stored program
ProgrammingStand alone, no computer needed
BellGBL-12 electric gong bell, 12 inch

In the box

  • 1 x 12 inch electric gong bell (GBL-12)
  • 1 x automatic school bell controller (ASBS-01)
Download datasheet (PDF)

Specifications from NavKar Systems' product details for this model. All prices include GST.

Frequently asked questions

Do I need a computer to program it?

No. It is a stand alone machine and no computer is needed to program the bell times.

How many bells can be set?

40 bells per day in each mode, and there are 3 modes.

What are the 3 modes for?

Regular, winter and examination modes cover the seasons and special events like sports, exams and annual functions.

Do the settings stay in a power cut?

Yes. No external battery is needed to keep the clock and stored program.

What is in the kit?

One GBL-12 12 inch electric gong bell and one ASBS-01 timer.

Can I connect a hooter or siren as well?

Yes. Any electrical device that works on 220 V AC, such as a bell, hooter or siren, can be connected.

Is it enough for a two shift school?

The product details say 40 bells per day in each mode is enough for two shift schools round the clock through the year.

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