- What is ESD Chair?
ESD Chairs are Static Control or Electrostatic Dissipative Chairs.
Their primary function is to divert static charge to the ground to reduce the buildup caused by sitting.
Then, the static is safely discharged through the floor.
They are usually composed of three key parts:
- An anti-static chair surface
- The support structure
- Casters or grounding cups
Where Are ESD Chairs Needed?
When you stand up from an ordinary chair, a significant electrostatic charge is often generated.
This kind of discharge poses one of the biggest risks in electronic workstations, potentially leading to equipment damage or product failure.
Therefore, ESD chairs are especially necessary in the following environments:
- Electronic production workshops
- Laboratories
- Dust-free cleanrooms
- Areas handling static-sensitive electronic components
Additionally, workers should also be supported by ergonomic ESD workbenches and reliable work chairs.
How to Choose a Good Anti-Static Chair?
To ensure reliability, the chair’s performance should meet recognized international standards, such as:
- IEC 61340-5-1
- ANSI/ESD S20.20
✅ Resistance Requirements:
- Surface resistance: 1×10⁵ Ω to 1×10¹⁰ Ω
- Volume resistance: 1×10⁵ Ω to 1×10⁹ Ω
🧪 Testing Methods:
- Place the chair on an insulation test bench with surface and volume resistance > 1×10¹³ Ω.
- Test point-to-point resistance between the seat surface and backrest using an ohmmeter.
- Test volume resistance using a 200×200 mm conductive plate under the caster, ensuring good contact.
Moreover, a good ESD chair should also have:
- Strong load-bearing capacity
- Resistance to compression and impact
- Comfortable seating
- Free height adjustment
- 360° rotation
Key Features of ESD Chairs
- ✅ Adjustable conductive backrests
- ✅ Durable metal frames
- ✅ Pneumatic height adjustments
- ✅ Ergonomic design for long-term seating
Conclusion
ESD chairs play a crucial role in protecting sensitive electronic components by preventing electrostatic discharge.
Therefore, choosing the right anti-static chair not only ensures safety but also improves comfort and productivity for workers in ESD-sensitive environments.
