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Renco® Preg-Alert Pro®

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Easily determine pregnancy and backfat.

Determine Pregnancy and Backfat and Loin Thickness the Easy Way in Swine, Cattle, Sheep and Horses.

The Renco® Preg-Alert Pro® is a multi-purpose, highly versatile A-Mode ultrasonic instrument for determining pregnancy and backfat. The digitally enhanced analog provides a clean, easy-to-read presentation that can be held on the screen for as long as user desires. The display provides specific information as to the location of the echoes of interest. For thickness measurements, distance is also given numerically. The microprocessor-based design provides wide flexibility in operating features.

This instrument measures backfat and loin muscle in millimeters or inches and uses the appropriate speed of sound factor when measuring fat or muscle. The testing process is totally non-invasive, minimizing the chance of infection and disease transmission.

The instrument is a small handheld device powered from 4 disposable "AA" batteries (included). Made from high impact plastic and though not waterproof, it is shielded to conform to all current applicable standards for electronic immunity and emissions. Designed to withstand adverse environmental conditions, normally associated with animal production.


  • Pregnancy detection in mammals ranging in body size from large rabbits and foxes to cattle and horses
  • Backfat thickness measurement (in mm or inches) for animals having one, two, or three layers of backfat. Loin muscle thickness measurement (in mm or inches). Uses the appropriate speed of sound factor when measuring fat or muscle
  • Also measures the thickness of certain other tissues, such as breast thickness in poultry and blubber thickness in some aquatic animals, e.g. the Harbour Porpoise

Pregnancy Detection:

  • Swine: 25-30 Days
  • Cattle: 30-37 Days
  • Sheep: 60 Days
  • Horses: 30 Days

Pregnancy Detection is Done in Several Ways:

  1. By detecting reflections (echoes) from the thickening of the uterine walls in those animals where this occurs, which take place very early in the pregnancy cycle.
  2. By detecting the echoes from the interface between amniotic fluid and the far side of the intrauterine wall.
  3. By detecting the echoes from the fetus(es). When measuring thickness, the user can restrict the maximum screen depth displayed in order to avoid spurious and non-meaningful data beyond the region of interest. Once a reading is obtained, one of the HOLD keys can be pressed to keep the reading on the screen until the key is pressed again to release it. The screen is backlit to aid in low visibility environments.


  • Operating Temperature Range: -20° F to 100° F
  • Power: 4 "AA" Batteries (included)
  • Dimensions: 8.75" L x 4.125" W x 2.5" H
  • Weight: 1.34 lbs.
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