Single Contact Key
Product Code : JA-EE-7420
The Single Contact Key (SKU JA-EE-7420) is a base-mounted press key for opening and closing a circuit by hand in physics practicals. This single contact key with 4 mm terminals has a plated spring arm with a press knob, a contact stud and a plated connecting strip, so it can be wired into bench circuits with standard leads. JaincoLab supplies it to school and college physics laboratories.
Specifications
The Single Contact Key is mounted on a base and consists of a plated spring arm with a press knob, a contact stud and a plated connecting strip, with 4 mm terminals for connection; pressing the knob brings the spring arm onto the stud and closes the circuit, and releasing it opens the circuit again.
| Product | Single Contact Key |
| SKU | JA-EE-7420 |
| Type | Single contact key, mounted on base |
| Spring arm | Plated, with press knob |
| Contact | Contact stud |
| Connecting strip | Plated |
| Terminals | 4 mm |
Applications of the single contact key
In physics practicals the single contact key closes a circuit only while it is pressed, which lets students pass current briefly, avoid draining cells continuously and take readings at a controlled moment in electricity experiments.
- Momentary switching of the galvanometer or cell circuit in potentiometer and Wheatstone bridge experiments
- Charging and discharging circuits for capacitors
- Brief current pulses when checking the deflection of a meter
- A push-to-close alternative to plug keys
- Class sets for B.Sc and senior-school electricity practicals
Scope of supply and ordering
The listing covers one single contact key on its base with spring arm, press knob, contact stud, connecting strip and 4 mm terminals. Leads and other circuit apparatus are separate items. Accessories, spares and quantities are confirmed on the quotation.
MOQ, lead time and packing are confirmed on each quotation for the quantity and delivery destination. JaincoLab supplies single keys, class sets for colleges and bulk education orders, including export consignments to Africa, the Middle East and South and South-East Asia.
Frequently asked questions
How does the single contact key work?
Pressing the knob moves the plated spring arm onto the contact stud and closes the circuit; releasing it opens the circuit.
How is it connected into a circuit?
It has 4 mm terminals, so it connects with standard 4 mm leads.
Is the key mounted?
Yes. It is supplied mounted on a base.
Related products
- Jockey with insulated handle
- Single Pole Knife Switch
- Knife Switch Double Pole On Base
- Knife Switch Single Pole Double Throw On Base
Keys, switches and jockeys for bench circuits are listed under electricity equipment from JaincoLab, a physics lab equipment manufacturer in India.
Request a quote
For a quotation on the Single Contact Key, send the quantity and destination through the JaincoLab contact page or email [email protected]. For tender or project supply, see our tenders page.
