FK401 Light Activated Switch Kit. Light falling on an LDR activates a relay circuit for control of alarms, gates, signage  and garden lighting to 500Watts AC. 12V Operation. Price inc GST. Add P & P 

FA401 Light Activated Switch Module. This kit can be assembled in one classroom session.  Light falling on an LDR activates a relay circuit for control of alarms, gates, signage  and garden lighting to 500Watts AC. 12V Operation. Price inc GST. Add P & P 

FK402 Remote Controlled Light Sensitive Switch. Here is a practical project that demonstrates a control function known as "alternate action"  Alternate flashing of a sender will turn the FK402 On and OFF. 12V Power Supply  Price inc GST. Add P & P

FK403 Auto Night Switch 12VDC. The LDR senses when night falls and operates a relay to switch loads such as security lighting and signage ON. 12V operation. Price inc GST. Add P & P

FK404 Auto Night Switch 240V.  Signage and safety lights are turned on automatically at dusk and turned off again at dawn.  This is a transformerless circuit powered directly by 240VAC. Recommended for experienced electrical installers only. Price inc GST. Add P & P

FK405 Touch sensitive Switch.  A simple class room demonstration of touch control used as an alternte action switch. Fingertips applied to both sensors turns the output On and Off. 12V power  Price inc GST. Add P & P

FK408 Voice Activate (VOX) Switch with Delay Timer Here is an ideal class room project demonstrating the use of sound as a controller in a practical application. A sensitive microphone picks up the sound and a potentiometer adjusts the sound threshhold at which the switch operates.  A 0-60seconds adjustable timer energises the 500VA output relay for a preset time. Uses include a stairwell light control and a child's toy switch  12V Operation
Price inc GST. Add P & P 

FK409 Sound Activated Switch  Sharp sounds such as hand claps or whistles actuate a 500VA control relay.  The output is an alternate action switch whereby the first sound turns the relay ON and the second turns it OFF. 12V Price  inc GST  plus P & P 

FK425 Water Pump Level Sense and Control.  Monitor the water level in dams and header tanks and control pumps and valves to control flow. 12V Power - suitable for solar powered operation. 
Price inc GST. Add P & P 

FK508 Ultrasonic Sensor.  An audio signal from the sender is picked up by the receiving transducer when an object or person comes into the focal point.  Use this to detect people, traffic, intruders or to let you know that your car is in the right spot in the garage.

Obsolete Item.  Available while stocks last.

If you are interested in  more than 1 item contact us for a special quote.

Price inc GST $60.65 plus P & P  

Twin Pack FK902 Water Level 3 Stage Indicator - Here is an excellent class Room Project and economical enough for every student to build their own. Hook up longer leads to the probes and the FK902 can monitor your rainwater or grey water tanks from indoors. Add an audio alarm to indicate low water. Powered by 6-9V Price for two kits incl GST. Add P & P

FK904 Rain Detecting Alarm - Great School's Project.
A gold Flashed detector grid senses the first raindrops letting you know when to bring the washing in.  Can also be used to detect spillages and seepages from washing machines or refrigerators. 
Price inc GST. Add P & P 

FK910 Water Sensor Alarm   Put this economical unit where there is the risk of seepage or spillage.  Detect if the refrigerator thaws out or if the washing machine overflows.  Helps prevent accidents.  Lots of applications in pump and retail safety situations.  9V Powered  
Price inc GST for two kits. Add P & P

FK911 Refrigerator Door Open Alarm  Refrigerators both domestic and commercial lose enormous amounts of energy when the doors are left open. The FK911 sounds an alarm if the door has been left open for more than the time set on the inbuilt timer. Powered by 9V Price inc GST. Add  P & P 

FK915 Low Battery Detect and Alarm The first time it deploys, the FK915 pays for itself.  Prevent over draining of Gel Cells by monitoring the terminal voltage. Adjust the threshhold between 7.8 and 12v.  When the voltage falls below the set point the load is disconnected. Price inc GST. Add P & P 

FK919 Metal Detector Unit
Detect copper, bronze, aluminium, iron.  Sensitivity and distance are adjustable by a presetting potentiometer.  A sounder indicates the presence of metals.
Price inc GST. Add P & P 

FA944  8 LED Water Quality Checker (Preassembled Module) Designed as a schools project, the FK 944 is a practical way of measuring contamination and salinity levels in water supplies.   The FA944 could also be used to water condition in cooling towers, streams, effluent outfalls and farm run-off waterways. 9V Powered.

Price  inc GST. Add Pack and Post

FK947  Irrigation & Spinkler Controller
This versatile circuit monitors the moisture level in the soil or propagation medium and operates an on-board power relay to control the amount of water delivered to plants via an electric pump or solenoid .

The FK947 features three user- programmable moisture level presets making it adaptable to managing the irrigation to a wide variety of plants.

An adjustable timer built into the FK947 will control the duration of the water flow to guard against over watering especially in situations where by necessity, the sensors are placed remotely from the water inlet.

Features:
- Three user-preset moisture detection levels.
- Three LED level moisture indicators
- Inbuilt timer
- Output relay
- Timed over-ride manual control

 Specifications:
- Power requirements: 12V at 40ma (operating) 25mA (standby)
- Timer setting range: 4 – 240seconds
- Relay control: 120Watts

To order this in preassembled and tested format, select the FA947 option below. Price is $22.81 .

MXA027 Ultrasonic Sensor Module Ready assembled this unit detects the presence of people or things as they pass through its "sweet"spot. Can be adjusted to detect over the range 300mm to 5metres
Obsolete Item.  Available while stocks last.
If you are intereted in more than 1 item contact us for a special quote.

Price inc GST$38.18 plus P & P 

MXA042 Flame Detector Unit  Used to monitor pilot lights and boiler jets the MXA042 uses the conductivity of flame to detemine whether gas or fuel oil should be shut off or purge cycled. commenced. 12V power  Price inc GST. Add P & P 

MXA049 Day/Night Activated Switch Module  As well as operating as a Dawn/Dusk switch for controlling signage, lighting and security,  the MXA049 will also find application in mark and edge detection in photo electric control circuits.  Two built-in 30 second delay timer control the ON delay and OFF delay times reducing the incidence of transient switching at dusk.  The delay times may be independently adjusted by increasing or reducing  the timing capacitor values. Additionally the MXA049 my be wired to respond to edge triggered light signals as well as level triggers.  Price inc GST. Add  P & P