Anti-Static Cleanroom ESD Wrist Strap

An effective static control program doesn't have to be expensive or complex. The main concept is to minimize generation of static and to drain it away when it does occur, thereby lessening the chance for an ESD event to happen. The ingredients for an effective ESD program are:
1. Education: to ensure that everyone understands the problem and the proper handling of sensitive devices.
2. Workstation Grounding: use a dissipative working surface material and dissipative flooring materials as required.
3. Personnel Grounding: using wrist straps with ground cords and/or foot-grounding devices.
4. Follow-up to ensure Compliance: all elements of the program should be checked frequently to determine that they are working effectively.

People are great static generators. Simple movements at the bench can easily build up charges as high as 500-1000 volts. Therefore, controlling this charge build-up on the technician is essential. The two best known methods for draining the charge on a person are wrist straps with ground cords and foot or heel grounders. Personnel can be grounded through:
1. Wrist Straps are probably the most common item used for personnel grounding. They are comprised of a conductive band or strap that fits snugly on the wrist. The wrist strap is frequently made of an elastic material with a conductive inner surface, or it may be a metallic expandable band similar to that found on a watch. For more information on wrist straps, check out this post.
2. Ground Cords are typically made of a highly flexible wire and often are made retractable for additional freedom of movement. There are two safety features that are usually built into the cord, and the user should not attempt to bypass them. The first, and most important, is a current limiting resistor (typically 1 Megohm) which prevents hazardous current from flowing through the cord in the event the wearer inadvertently contacts line voltage. The line voltage may find another path to ground, but the cord is designed to neither increase or reduce shock hazard for voltages under 250 volts. The second safety feature built into most cords is a breakaway connection to allow the user to exit rapidly in an emergency. This is usually accomplished by using a snap connector at the wrist strap end.
3. Foot or Heel Grounders are frequently used where the technician needs more freedom of movement than the wrist strap and cord allow. The heel grounder is often made of a conductive rubber or vinyl and is worn over a standard shoe. It usually has a strap that passes under the heel for good contact and a strap of some type that is laid inside the shoe for contact to the wearer. Heel grounders must be used with some type of conductive or dissipative floor surface to be effective and should be worn on both feet to insure continuous contact with the floor. Obviously, lifting both feet from the floor while sitting will cause protection to be lost.Don't forget to regularly check and verify your personnel grounding items:

Comfortable and Conductive Wristband

The band is woven from conductive yarn and soft nylon for easy wearing and has great electrostatic discharge ability.

Rotatable Snap Connector

The snap connector can be rotated by 360° to avoid the wire twining and ensure effective work.

Flexible PU Grounding Wire

This elastic grounding wire is not only very durable but also attractive, and can be stretched to 70.87'' and recovered.

Safe Electrostatic Discharge Process

1MΩ resistor inside can ensure performance and help protect the wearer from shock hazards.

Wrist Band:
1.Light blue band of economy type, comfortable wearing, adjustable to fit any size of wrist.
2.10mm stud.
3.High quality conductive interior made of stainless steel nylon filament. Outer side process with non-conductive nylon yarn.
4.Surface resistivity: 103 Ohms.
Grounding Cord:
1.Light blue cord, 6ft in length
2.OD: 2.4mm (±0.1mm)
3.Tinsel 1/7 inner conductors. PU curly cord, PVC molding
4.Contains a 1M Ohm resistor for operator safety

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