Knife Switch
Product Code : LSK-PL-10311
Knife Switch (SKU LSK-PL-10311) is a single pole, single throw switch with brass poles and blade on a plastic base, used to open and close student circuits so the break in the circuit is clearly visible. It is a standard component for school electricity practicals and introductory college labs. Science Lab Supplies builds it in its factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and sells directly to schools, colleges, tender contractors and distributors.
Specifications
The switch has a single brass blade that swings into or out of brass contacts, giving one on/off path (SPST). Brass is used for the poles and blade to keep the electrical connection good, and all the parts are mounted on a plastic base that carries the switch into the circuit.
| Parameter | Value |
|---|---|
| SKU | LSK-PL-10311 |
| Type | Single pole, single throw (SPST) |
| Poles and blade | Brass |
| Base | Plastic |
| Use | Electricity circuits in teaching labs |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Knife Switch
A knife switch lets students see exactly when a circuit is open or closed, which makes it a natural teaching switch for first circuits and for measurement practicals where the current should flow only while readings are taken. It fits electricity topics from middle school through Class 12 and college physics labs.
- NCERT Class 6 science (Electricity and Circuits): open and closed circuits.
- Class 10 physics (Electricity): switching Ohm's law and resistor circuits.
- Class 12 and B.Sc. practicals: a plain on/off switch in bridge and potentiometer circuits.
Standard Scope of Supply
The Knife Switch is supplied as a single unit as described above: brass poles and blade assembled on the plastic base, ready to be wired into a circuit. Cells, leads and other circuit components are not part of this item and can be listed on the same quotation.
Packing, MOQ and Lead Time
You may request a quotation for a few switches or for a full set of circuit benches. Each quotation gives the packing, delivery time and price for the quantity requested, and leads, cell holders or bulb holders can be added so the complete circuit kit arrives together.
Holding an Importer-Exporter Code, Science Lab Supplies as a registered exporter can ship to buyers in Qatar, Sri Lanka, Vietnam, Malaysia, Peru and Egypt. Write in through the contact page, build a list in the enquiry cart, or see the lab tender page for institutional tenders.
Frequently Asked Questions
What type of knife switch is this?
It is a single pole, single throw (SPST) knife switch: one blade opens or closes one circuit path. That makes it a simple on/off switch for series circuits and measurement set-ups.
What are the blade and contacts made of?
The poles and blade are brass, chosen to give good electrical connections, and they are mounted on a plastic base. The switch is intended for use in electricity circuits.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer of this switch. It works as a school physics lab equipment maker in India from its own factory in Saha, Ambala, and issues quotations directly.
Can knife switches be quoted for a school tender?
Yes. Send the quantity, delivery location and any tender specification, and the quotation will list the switch against that specification together with any other circuit items you need.
Related Circuit Components
A switch works alongside a power source, a load and connecting leads. The four items below complete that circuit on the student bench, from a cell holder to heavy-duty clip leads, and all of them can go on the same quotation as the knife switches.
- Double-Pole Switch — 24 V, 2 A panel-mount switch for controlling direction or power state.
- Cell Holder — 1.5 to 6 V DC from four D cells, with 4 mm sockets.
- Circuits Kit Bulb Holder — panel-mounted bulb holder that serves as the circuit load.
- Alligator Leads Heavy Duty — pack of 10 leads with 10 mm jaw openings.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
