Catalog Submetering Online shopping Customer Service Custom Products OSI Sales partners
Home
Site Map
Glossary
Quote Request
Tech Library
Catalog Request
Download Catalog

Product Families

Electrical Current Measurements

Electrical Voltage Measurements

Electrical Power and Energy Measurements

Electrical Frequency Measurements

Multifunction Electrical Measuring Devices

4242 Reynolds Dr.
Hilliard, OH 43026

Phone:
(800) 537-6732
or (614) 777-1005
Fax: (614) 777-4511

Electrical Frequency Measurements

Typically frequency transducers provide an analog output which is proportional to the frequency of the input source.  Differences between various models are generally related to the width of the frequency range being measured and the instrument accuracy, the mounting style and certified agency approvals.

OSI manufactures frequency transducers that can accommodate frequency range inputs from 10-1000Hz.  Input voltages can range between 3 and 575V depending on the model.

Popular frequency transducers available from OSI include the FT, AFT, DFT and DFTA.

FT Spec Sheet
FT
Features
All units are self-powered from  the measured  line.
Typical Applications

Any application that requires indication or recording of instantaneous frequency.
Input Range Std.Outputs Accuracy
  • 45-55 Hz
  • 55-65 Hz
  • 375-425 Hz
  • 95-270 Vac
See spec sheet for individual model numbers and complete product specifications including  input voltage range limits.
  • 0-1mAdc
  • 0-10Vdc
  • 0-5Vdc
  • 4-20mAdc
  • 0-20mAdc
  • 50/60Hz models: ±0.05 Hz
  • 400 Hz Models: ±0.2Hz
AFT Spec Sheet
AFT
Features

An expanded version of the Model FT.

The AFT combines wide frequency range capability with high accuracy measurement in a UL/CUL-listed package.

Each model covers all input voltages from 3-575V
Typical Applications

Any application that requires indication or recording of instantaneous frequency.
Input Range Std.Outputs Accuracy
  • 0-1000 Hz
  • 3-575 V
See spec sheet for individual model numbers and complete product specifications including  input voltage range limits.
  • 0-1mAdc
  • 0-10Vdc
  • 0-5Vdc
  • 4-20mAdc
  • 0-20mAdc
  • ±0.05% Rdg, ±0.05 Span
DFT Spec Sheet
DFT
Features

Frequency measurement of sinusoidal and distorted wave forms.

Digital period measurement

Analog output

DIN packaging
Typical Applications

Any application that requires indication or recording of instantaneous frequency.

Use where CE and/or CSA approval listing is required.
Input Range Std.Outputs Accuracy
  • 45-425 Hz
  • 10-230 V

See spec sheet for individual model numbers and complete product specifications.

Additional frequency and voltage ranges available.
  • 0-1mAdc
  • 0-10Vdc
  • 0-5Vdc
  • 4-20mAdc
  • 0-20mAdc
  • 50/60Hz models: ±0.02 Hz
  • 400 Hz Models: ±0.1Hz
DFTA Spec Sheet
DFTA
Features

Provides analog output which is proportional to the input frequency over  wide ranges.

DIN packaging.
Typical Applications

Power generation and energy management.

Any application that requires indication or recording of instantaneous frequency.

Use where CE and/or CSA approval listing is required.
Input Range Std.Outputs Accuracy
  • 10-1000 Hz.
  • 10-230V

See spec sheet for individual model numbers and complete product specifications.

Additional frequency and voltage ranges available.
  • 0-1mAdc
  • 0-10Vdc
  • 0-5Vdc
  • 4-20mAdc
  • 0-20mAdc

  • ±0.2% of Span