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Distributors and OEM orders welcome. We make clocks and displays to your specifications.
KERA Technologies Inc.
Jumbo LED Digital Clocks with REMOTE CONTROL
SELENA
Accessories for SELENA Clocks and Timers
APPLICATIONS

HOSPITAL
SCHOOL
AIRPORT
ARMY BASE
MARINE VESSELS
SHIPS, BOATS
SUBMARINES
BANK
STADIUM
GYM
CHURCH
SUBWAY STN.
BUS STN.
RAILWAY STN.
LED Clocks
and Timers
Sirens and Buzzers for programmable timers and counters
Toll Free:  1-866-829-4253
115 dB sound, 20 Watts power
5" x 8"  ABS plastic
6-15VDC supply
May be powered externally
or directly from the clock
if option # 729PS installed
Option # 729HP
High Power External 8 inch
All-Weather Horn / Buzzer / Siren
Option # 729MP
Medium Power External 4 inch
All-Weather Horn / Buzzer / Siren
Option # 729PZ
Medium Power External 2 inch
Piezo Horn / Buzzer / Siren
110 dB sound, 10 Watts power
4" Dia. ABS plastic
6-15VDC supply
May be powered externally
or directly from the clock
if option # 729PS installed
105 dB sound, 3 Watts power
2" Dia.  ABS plastic
6-15VDC supply
May be powered externally
or directly from the clock
if option # 729PS installed
Option # 729LPW
Low Power Piezo
Alarm Buzzer
Option # 729LPX
Low Power Piezo
Alarm Buzzer
110 dB sound, 0.5 Watt power
1.5" Dia. ABS plastic
6-24VDC supply
Powered directly from the clock.
110 dB sound, 0.5 Watt power
1.5" Dia. ABS plastic
6-24VDC supply
Powered directly from the clock
Temperature Probes and Sensors  ( for options # 711, 712, 713, 714B and 714C )
The internal buzzer is not very loud and for applications where a loud Horn or Siren is needed,
an external Horn / Buzzer may be installed. It can be controlled by the clock internal relay ( option # 727 ) that is operated automatically by the programmable timers, counters or temperature alarms.
All SELENA clocks include Internal Piezo Buzzers for Alarms
initiated by the clock timers, counters or temperature monitors..
The temperature monitoring, programmable thermostat and control options require an internal or external temperature sensor probe. The standard sensor normally included with the selected option may not be the most suitable model for each application and therefore a specific probe model may be ordered.
The selection below shows some of the available models and mounting accessories.
NA7100KB4100BLK


NA7100KB4100CHR


NA7100KB4100RDT



NA7100KB4100SQT


NA7100KB4100DPD


NA7100KB4100SHD



PT1000TC38550MM




NA7100KB4100PIPTR
SELECTION of standard Temperature Probes :
OPTIONAL Plastic or Metal (SS)
Sensor Probe Plate
(model PPP4 or PPS4 ).
OPTIONAL:
Sensor Probe Guard
model PG5 (black or grey ) .
Thermowell model:
SSTW-114-066-050NPT
Stainless Steel
Stem = 4-1/2"
Bore = 0.26"
1/2 NPT thread
Thermowell model:
SSTW-114-066-075NPT
Stainless Steel
Stem = 4-1/2"
Bore = 0.26"
3/4 NPT thread
Thermowell model:
SSTW-41-066-050NPT
Stainless Steel
Stem = 1-5/8"
Bore = 0.26"
1/2 NPT thread
Thermowell model:
SSTW-64-066-050NPT
Stainless Steel
Stem = 2-1/2"
Bore = 0.26"
1/2 NPT thread
Thermowell model:  BTW-100-05-075NPT
Brass, Stem = 4" , Bore = 0.2", 3/4 NPT thread
Thermowell model:  BTW-25-05-075NPT
Brass, Stem = 1" , Bore = 0.2", 3/4 NPT thread
Thermowell model:  BTW-25-05-025NPT
Brass, Stem = 1" , Bore = 0.2", 1/4 NPT thread
Protective Guards / Covers for clocks  ( option series # 745 type A and B )
In some installations like Gym, Bus Station, Swimming Pools etc..., the clock may have to be protected against accidental damage by a flying object or debris. The protective covers made out of Acrylic or Lexan are highly impact resistant and fully transparent.
SPECIFICATIONS:

Material: TRANSPARENT ACRYLIC or LEXAN
Wall Thickness:   3/16" (4.75 mm )

Model # 745ACA4 and # 745LXA4
Dimensions for 4 inch, 4 and 6 digits models:
Overall:   20" x 11" x 5"   (50.8 cm x 28 cm x 12.7 cm)

Model # 745ACA7 and # 745LXA7
Dimensions for 7 inch, 4 and 6 digits  models:
Overall:   36-3/8" x 16-3/8" x 5"   (92.4 cm x 41.6 cm x 12.7 cm)

Model # 745ACA7L and # 745LXA7L
Dimensions for 7 inch, 6 and 8 digits, and special models:
Overall:   52-3/8" x 16-3/8" x 5"   (133 cm x 41.6 cm x 12.7 cm)

Model # 745ACB74 and # 745LXB74
Dimensions for 7 inch, 4 digits models:
Overall:   25-3/8" x 11-1/8" x 4-3/4"   (64.5 cm x 29 cm x 12 cm)

Model # 745ACB76 and # 74LXB76
Dimensions for 7 inch, 6 digits models:
Overall:   36-3/4" x 11-1/8" x 4-3/4"   (93.3 cm x 29 cm x 12 cm)
RS232 to RS485 serial CONVERTER module  ( option # 901 )
This converter may be used to provide RS485 serial communication where only RS232 or USB port is  available.
One side plugs into RS232 serial port or extension cable and the RS485 wires may be connected to the terminal block on the other side.
RS485 communication allows for sending reliably fast data over long distance using just a simple pair of wires ( 2-conductor cable ) that does not have to be shielded.
USB to RS232 serial CONVERTER module  ( option # 903 )
This converter may be used to connect a USB port in computers to an RS232 serial device.

One side plugs into the USB serial port or extension cable and the RS232 side 9 pin connector may be connected to the device or an extension cable
Option # 729HPCO
High Power Compact  External 4 x 4 inch
All-Weather Horn / Buzzer / Siren
118 dB sound,15 Watts power
4" x 4" x 4"  ABS plastic
6-15VDC supply
May be powered externally
or directly from the clock
if option # 729PS installed
In the field, where the line power is not available this battery backup may be used to power up any clock / timer model for several hours of operation.

It can be automatically recharged by plugging it into the power line when the charge runs low.


Power retention at low to medium brightness:
Battery backup inverter  ( option # CP350, CP750, CP1250, CP2000 )
Model CP350:
For 4 inch displays    up to  6 hours
For 7 inch displays:   up to  3 hours
Model CP750:
For 4 inch displays    up to  12 hours
For 7 inch displays:   up to  6 hours
Model CP350 shown.
The actual model may not be exactly as shown.
Model CP1250:
For 4 inch displays    up to  20 hours
For 7 inch displays:   up to  10 hours
Model CP2000:
For 4 inch displays    up to  35 hours
For 7 inch displays:   up to  18 hours
Although clocks / timers for 12VDC ( or AC ) may be ordered, a 12V battery necessary to run the display for several hours may be very sizeable and heavy, and it will require a separate battery charger. A simpler solution is to order a clock model for the power line and use a Battery Backup Inverter that already contains the neccessary battery and automaic charger.
For use where the power line is not available