KELVIN® Electronics Kits
  • KELVIN® Temperature Control Assembled Demo

    KELVIN® Temperature Control Assembled Demo

    General purpose thermostat with a NTC temperature sensor with a range of (41° F to 86° F). A relay output control's high power load with a 30 second hysteresis. Requires 9V battery. Does not include enclosure, use 430202. Teacher Demo Unit,...

    $59.95
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  • KELVIN® Water Level Meter Kit

    KELVIN® Water Level Meter Kit

    How much fluid is left in your tank? To determine the liquid level in a container, this kit would be a great tool to complete this task. Requires 9VDC battery. Kit.

    $13.95
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  • KELVIN® Water Level Meter Assembled Demo

    KELVIN® Water Level Meter Assembled Demo

    How much fluid is left in your tank? This kit is a great tool to determine the liquid level in a container. PC board measures 2-1/2 x 2 in. Requires a 9V battery. Teacher Demo Unit, Assembled/Tested.

    $59.95
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  • KELVIN® Moisture Sensor Kit

    KELVIN® Moisture Sensor Kit

    How about giving plant lovers a gift? Build this KELVIN® Plant Moisture Monitor, and use it to check soil moisture for your plants- and keep the plants alive! By placing the probes in the potting soil of the plant, the moisture level is tested and a...

    $9.95
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  • KELVIN® Moisture Sensor Bulk Pack

    KELVIN® Moisture Sensor Bulk Pack

    Bulk Pack of 20 - As Low As $7.45 Per Kit! Use this kit to check the soil moisture of plants and keep them alive! By placing probes in the potting soil of the plant, the moisture level is tested and a buzzer sounds if the level is low. Requires a 9V...

    $149.00
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  • KELVIN® Moisture Sensor Assembled Demo

    KELVIN® Moisture Sensor Assembled Demo

    Use this kit to check the soil moisture of plants and keep them alive! By placing probes in the potting soil of the plant, the moisture level is tested and a buzzer sounds if the level is low. Requires a 9V battery. Teacher Demo Unit, Assembled/Tested.

    $59.95
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  • KELVIN® Audio Level Meter Kit

    KELVIN® Audio Level Meter Kit

    The louder the sound, the more the LEDs will light. This kit uses the LM3915 Bar Graph IC and an audio pre-amplifier stage to measure an audio level. It has a sensitivity adjustment to increase or decrease the microphone sensitivity level. Requires 9VDC...

    $15.95
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  • KELVIN® Audio Level Meter Bulk Pack

    KELVIN® Audio Level Meter Bulk Pack

    Bulk Pack of 10 - As Low As $12.00 Per Kit! Uses an LM3915 Bar Graph IC and audio pre-amplifier stage to measure an audio level. The Meter includes a sensitivity adjuster to increase and decrease the mic's sensitivity level. Requires a 9V battery.

    $140.00
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  • KELVIN® Audio Level Meter Assembled Demo

    KELVIN® Audio Level Meter Assembled Demo

    Uses an LM3915 Bar Graph IC and audio pre-amplifier stage to measure an audio level. The Meter includes a sensitivity adjuster to increase and decrease the mic's sensitivity level. Requires a 9V battery. Teacher Demo Unit, Assembled/Tested.

    $59.95
    Add to Cart
  • KELVIN® Metal Detector Kit

    KELVIN® Metal Detector Kit

    This handy metal detector, detects metallic objects in or behind surfaces. Sensor is mounted on a wooden stick to minimize interference. Kit requires a 9V DC battery. Kit does not include an enclosure.

    $14.95
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  • KELVIN® Metal Detector Bulk Pack

    KELVIN® Metal Detector Bulk Pack

    Bulk Pack of 10 - As Low As $12 Per Kit! This handy metal detector, detects metallic objects in or behind surfaces. Sensor is mounted on a wooden stick to minimize interference. Requires a 9V battery. Does not include enclosure.

    $120.00
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  • KELVIN® Metal Detector Assembled Demo

    KELVIN® Metal Detector Assembled Demo

    This handy metal detector, detects metallic objects in or behind surfaces. Sensor is mounted on a wooden stickto minimize interference. Requires a 9V battery. Does not include enclosure, use 430182. Teacher Demo Unit, Assembled/Tested.

    $69.95
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  • KELVIN® Metal Stud Finder Kit

    KELVIN® Metal Stud Finder Kit

    This handheld kit detects Metal Studs behind a wall. Helps with remodeling and wiring. Kit requires a 9V DC battery. Kit does not include an enclosure.

    $12.75
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  • KELVIN® Metal Stud Finder Bulk Pack

    KELVIN® Metal Stud Finder Bulk Pack

    Bulk Pack of 10 - As Low As $9.99 Per Kit! For education purposes only. Listen to a clear broadcast over 100 ft. away by using any standard FM radio. Each kit includes: Pre-Drilled PC Board Parts Instructions Requires a 9V battery and an FM Radio.

    $99.95
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  • KELVIN® Metal Stud Finder Assembled Demo

    KELVIN® Metal Stud Finder Assembled Demo

    This handheld kit detects metal studs behind a wall. Helps with remodeling and wiring. Requires a 9V battery. Does not include enclosure, use 430182. Teacher Demo Unit, Assembled/Tested.

    $69.95
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  • KELVIN® Micro-Mazer™  Kit

    KELVIN® Micro-Mazer™ Kit

    This is a fun kit! The layout of the components on the PC board gives it the look of an electronic robotic face. The blinking LED eyes give it a personality. And the price gives you a reason to buy a dozen or two. Put it on your shirt and you'll be sure...

    $6.95
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  • KELVIN® Micro-Mazer™ Bulk Pack

    KELVIN® Micro-Mazer™ Bulk Pack

    Bulk Pack of 20 - As Low As $3.95 Per Kit! The layout of components gives this kit a 'robotic face'. Blinking LED eyes give it a personality. Each kit includes: [2] blinking LEDs for eyes and a jumbo LED for a nose. Requires a 9V battery.

    $79.00
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  • KELVIN® Micro-Mazer™ Assembled Demo

    KELVIN® Micro-Mazer™ Assembled Demo

    The layout of components gives this kit a 'robotic face'. Blinking LED eyes give it a personality. The kit has [2] blinking LEDs for eyes, and a jumbo LED for a nose. Requires a 9V battery. Teacher Demo Unit, Assembled/Tested.

    $49.95
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  • KELVIN® Fiber Optic Alarm Chain Kit

    KELVIN® Fiber Optic Alarm Chain Kit

    Use this High Tech Fiber Optic Circuitry to trigger your alarm System. Wrap the fiber optic cord around your computer or valuable possession. If the fiber optic wire is cut, it's relay will trigger your alarm circuitry (alarm circuitry sold separately)...

    $29.95
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