Correx Gram Force Gauges are manufactured by Haag-Streit, in Switzerland. This is the ideal all-mechanical instrument used to measure and calibrate the pressure or force required to actuate micro switches, relays, electric contacts, friction torque, etc.
•In aviation they are used as a component in Lift Transducers manufactured by Tronair.
•The feeler arm can be chemically sterilized for use by orthodontists, for tooth implants and in pediatric dentistry.
•Piano technicians will use the force gage to standardize hammer mechanisms.
•University labs have used the gages to measure biological response threshold.
•Thread and yarn tension in sewing and weaving machines.
•Repair shops, like us, use the gage to set proper return spring tension.
The Correx force gage fits easily in the hand, weighing from 4 to 9 oz.
They have been variously sold as tension and compression gages; more recently as dynamometers. The dials are graduated in both gram/pond and centi-Newton.
About Newtons and Ponds
Newton (N): In the meter-kilogram-second system, the unit of force required to accelerate a mass of one kilogram one meter per second per second, equal to 100,000 dynes. The inner scale on the Correx force gage is calibrated in centi-Newtons.
The outer scale on the dial is calibrated in grams and ponds. This outer scale is used for calibration purposes when weights are suspended from the feeler arm.
Pond: the metric unit of force seen on the outer scale of the Correx force gages. A pond is the gravitational force at mean sea level on a mass of one gram; thus it is equal to .980665 centiNewtons. The pond has disappeared from many applications because it is not an International Standards (SI) unit.
These gages are not available with ounce-force or pound-force scales. Rather than making conversions, which is likely to introduce errors, you'd be wiser to find another manufacturer's force gage with the correct dial graduations. If you decide to convert, here are some equations:
•1 pond = .98066 centi-Newton (cN)
•1 centi-Newton (cN) = .01 Newton
•1 centi-Newton (cN) = .036 ounce-force
•1 centi-Newton (cN) = .0022 pound-force
•1 Newton = 100 cN
•1 Newton = 0.225 pound-force
•1 pound-force = 4.448 Newton
•1 pound-force-inch = 0.113 Newton-meter
•1 Newton-meter = 8.851 pound-force-inch
