Contact Key (Push Switch) Manufacturer,Supplier and Exporter in India

Contact Key (Push Switch) (Product Code: SLE/PHY/94) is a single contact key on a base, used to close a circuit only while it is pressed during physics practicals such as galvanometer and induction experiments. A plated spring arm with a press knob lifts clear of the contact as soon as it is released, and 4 mm terminals make the key quick to wire into a circuit. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.

Specifications

What Is the Contact Key Used For?

A contact key is used wherever current should flow only for a moment: tapping it while watching a galvanometer, closing a circuit briefly to find the balance point on a meter bridge or potentiometer, or switching a coil on and off to show an induced current. Keeping the circuit closed only while a reading is taken also stops resistance wires and cells from warming up or running down, which improves the accuracy of student results.

Press the knob squarely so the spring arm meets the contact stud cleanly, and avoid holding it down longer than necessary. If connections become intermittent, wipe the contact surfaces and check that the 4 mm terminals are tight.

What to Specify When Ordering

• Number of contact keys, usually one per practical bench.
• 4 mm leads needed to connect the key into circuits.
• Delivery location for the quotation.

OEM Manufacturer

The Contact Key is made by ScienceLab, the trading name of Jain Scientific Equipments Private Limited, which acts as the OEM and manufactures it at its own factory at Saha, Ambala, Haryana. Physics departments, dealers and importers order these bench accessories straight from the maker, keeping repeat orders and replacement keys simple to arrange. You can read about the company on its profile page.

Related Physics Lab Equipment

Other switching and measuring items used in the same practicals:

• One Way Key — a plug-type key with brass blocks and a tapered plug for circuits that stay closed.
• Knife Switch – Single Pole, Single Throw — a brass knife switch on a base for latching on/off control.
• Switches (Econ) with Fahnstock clips — low-cost economy switches packed for class sets.
• Stackable Leads — 4 mm leads for wiring the key's terminals.
• Galvanometer 50-0-50mV — a centre-zero moving coil meter read while the key is tapped.

Browse more practical apparatus in Physics Lab Equipment.

Frequently Asked Questions

How does the Contact Key (Push Switch) work?
The Contact Key (Push Switch) closes a circuit when its press knob pushes a plated spring arm onto a contact stud. When the knob is released, the spring lifts the arm away and the circuit opens again, giving momentary control.

What terminals does the Contact Key (Push Switch) have?
The Contact Key (Push Switch) has 4 mm terminals linked through a plated connecting strip, so it accepts the standard 4 mm leads used in school and college physics laboratories.

Which experiments use a contact key?
The Contact Key (Push Switch) is used in experiments that need brief current flow, such as galvanometer null readings, meter bridge and potentiometer balancing, and induction demonstrations. Short contact prevents cells and resistance wires from heating or draining during measurements.

Does the contact key stay on when pressed?
No. The Contact Key (Push Switch) is a momentary key: the circuit is closed only while the knob is held down. For a switch that stays on, choose a knife switch or a plug key from the related items above.

Who manufactures the Contact Key (Push Switch)?
The Contact Key (Push Switch) is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM at its own factory in Ambala, Haryana, India, and is sold direct to institutions, dealers and importers.

Can contact keys be ordered for a whole laboratory?
Yes. The Contact Key (Push Switch) can be quoted for a single bench or for entire physics laboratories in India and international markets. Send the quantity, any 4 mm leads required and the delivery destination through the contact page.

Request a Quote

For a quotation on the Contact Key (Push Switch), send your quantity through the contact page or add the key to the enquiry cart. The price comes directly from the manufacturer.

Last updated: 24 September 2026