Pulsimatic Transmitter a Classic Pulse Output Device

 In Pulsers

The IMAC Pulsimatic Transmitter is a pulser that transmits uncorrected gas volume output from gas meters to remote totalizing and recording equipment. IMAC Systems has manufactured the device for over 30 years. It comes in ten different pulse outputs to satisfy most requirements.

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Pulsimatic Transmitter for Pulse Output

The pulser offers dependable, reliable, long-term use and has been endorsed by meter manufacturers and served over 300 public/private utilities. This pulse output device is a sturdy, simple, and easy-to-install Pulse Output retrofit for meters with instrument drives.

Meters with Instrument DrivesManufacturer
Diaphragm Meters (675 Class and larger)
  • American Meter (optional extended shaft required)
  • Sensus
  • Itron (optional mounting kit required for 675, 800, or 1000)
Turbine Meters
  • American Meter (seal plate is required)
  • Sensus
Rotary Meters (ID/TCID/CD/TD option)
  • Roots
  • Romet
IMAC Pulsimatic Transmitter a Pulser for Gas Output

IMAC Pulsimatic Transmitter

The Pulsimatic Transmitter creates a pulse for a meter that may not already have a pulse. The rotation of the meter’s drive dog (wriggler) establishes a pulse. There are three different Pulsimatic series, the Reed Switch, Optical Sensor, and High-Speed Encoder.

Reed Switch Series

The Reed Switch series (low frequency) units pulse (including 1, 2, 5, 10, 20, and 50 pulses per revolution) by a rotating multi-pole magnet, opening a Form ‘C’ or Form ‘A’ Reed switch. This style of pulsers does not require power; only a wetting current and the breakage of the current creates the pulse. These Pulsimatic Transmitters are known as simple apparatuses.

Optical Sensor Series

The Optical Sensor series units create 100 pulses per revolution and are available in two styles, the proprietary IMAC Systems XS optical sensor (300-XS-100) or a Pepprl-Fuchs (PF) Sensor (300-PF-100).

The IMAC Systems XS version uses an in-house circuit board and sensor. This pulser requires 6 to 24 V DC to operate. A rotating slotted disc breaks the optical beam creating a square wave, and the square wave amplitude is proportional to the power supplied.

The Pepperl Fuchs sensor also requires 6 to 24 V DC to operate. As the XS version, the unit creates a square wave amplitude proportional to the power supplied. The PF Sensor does not have a circuit board internal to the Pulsimatic, so it requires a PF accessory to create the pulse. The recommended supplement is Pepperl & Fuchs model # KFD2-SOT2, a switch-amplifier & isolation barrier combination.

High-Speed Encoder Series

The High-Speed Pulsimatics (300-EM-500 and 300-EM-1000) give an output of 500 or 1000 pulses per revolution. This style of pulser uses a circuit board and high-speed encoder and requires 6 to 24 V DC to operate and creates a square wave. The amplitude of the square wave is proportional to the power supplied.

Pulser Applications

Utilities use the Pulsmatic Transmitters for several reasons, including:

  • Rate studies
  • Supplying customers with a pulse
  • Feeding ancillary equipment with a pulse (pulse accumulator, non-standard AMR/AMI RTU)
  • Controlling odorization
  • Controlling valves

The Pulsimatic installs beneath the meter’s index, so if the index stops, the Pulsimatic keeps working. If the pulser malfunctions, it is easy and inexpensive to repair. The unit is outside the meter’s pressure body, so there is no service disruption when installing or removing the Pulsimatic Transmitter.

IMAC Pulsimatic Options

Installation for the pulser on Sensus, Roots & Romet is simple and noted on the price sheets.  When ordering, ask about the meter-specific installation hardware.

  • Varying plug or pigtail configurations
  • Single or dual output
  • Bracketing to install third-party equipment
  • Extended shaft for American diaphragm meters
  • Special mounting kit for Itron diaphragm meters 675, 800 and 1000
  • Seal plate for American turbine meters

For more information, see the Pulsimatic product page, download the cut sheet, visit IMAC Systems, or request a quote.

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