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VOLUME -26 NUMBER 9
Publication Date: 09/1/2011
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September 2011 Issue
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Calex Intros Strain Gage Signal Conditioner
Concord, CA — Calex Mfg. Co., Inc. has introduced the Model 437, a self-contained, DC-powered signal conditioner for load cells and transducers utilizing full bridge strain gages. It contains a precision instrumentation amplifier with an isolated, filtered output and a highly regulated, low noise, adjustable output bridge excitation source.
The 437's unusual Bridge Balance pot and high gain capability will reportedly accurately condition load cell weighing systems with large tare offsets and small live load signals. The unit provides an isolated 4-20mA or 0-20mA output capable of driving a 1000Ω loop. This model uses a high gain amplifier which can accept full scale live load signals as low as 5mV and provide a 16mA output span. The unit also has a bridge balance with an 80 percent tare offset capability. The Model 437's excitation supply is capable of driving four 350Ω load cells.
The unit is completely encapsulated for use in rugged environments. Overall dimensions are 3.25 x 2.00 x 2.87-in. (83 x 50.8 x 73mm). The company offers a mounting kit for use in DIN Rail applications.
Contact: ConTech/Calex Mfg. Co., Inc., 2401 Stanwell Dr., Concord, CA 94520-4841
800-542-3355 or 925-687-4411 fax: 925-687-3333 E-mail: sales@ConTech-us.com Web:
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