Mantax Blue

Mantax Blue is a classic diameter caliper available in many graduation options and lengths.

The Mantax Blue

Mantax Blue is available in the largest selection of scale lengths, graduation options and models. This caliper model has detachable, adjustable and exchangeable jaws, non-wear scale print, and a durable and ergonomic design. 


Mantax Blue calipers are used in a wide variety of applications and many different operation areas such as diameter measuring of trees and timber, log scaling, in fishery industry & wildlife management, in contruction and in healthcare industry.

Wildlife management in South Africa.

Image courtesy of X Combrink Zululand Nile Crocodile Research Programme Ezemvelo KZN Wildlife & University of KwaZulu Natal South Africa.

Haglöf Sweden’s wide range of mechanical caliper models is suitable for or can be adapted to fit fishery and wildlife management. With our in-house production facilities and long experience we have great capacity to customize the products and software applications. It also helps to be curious – and we are!

Together with specialized user groups and suppliers, Haglöf Sweden have developed solutions including electronic calipers and remote sensors to measure and store fish lengths and diameters at sea. Information is collected and stored digitally, and can later be transferred to handheld or PC for further processing and storing. The custom designed application is adapted to control fish stock, size and quality – both for research and for commercial reasons, and the results are aimed to achieve a better understanding of migration and movement, growth and survival rates.

The overall measurement of a fish, whether it is fork-tailed or round tailed, is taken from the snout on the upper jaw to the end of the tail. For freshwater fish, the measurements used are total length and girth. The total length is the maximum length of the fish, with the mouth closed and the tail fin pinched together. Conversely, most marine refer to the “fork length”, and scientists often use “standard length” which is to the end of the fleshy part of the body. “Standard length” has the advantage of not being affected by minor damage to the tail fin, nor does it give too much credit to a fish for the relatively light weight tail when calculating a fish’s condition.

Eastern Desert, Egypt, January 2015. Coring Acacia tortillis.

“Measurement Procedures: Linear Measurements can either be taken with calipers (straight-line measurements) or with a flexible tape measure (curved measurements). The decision is one of accuracy, precision, cost, and convenience. Curved measures tend to be less accurate and less precise (Bjorndal and Bolten, 1989; Frazier, 1998; Pritchard et al., 1983; Shoop and Ruckdeschel, 1986) because of irregularities and epibionts on the surface of the turtle’s shell. Also, in the juveniles of some species, the vertebrals are keeled, and the posterior carapace in  some species has a steep change in slope which make curved carapace length difficult to measure with accuracy and precision.”

Scale Variet

The Mantax Blue scale print is made to last and available in the markets’ largest assortment of lengths and graduation options. Contact us to know more on different scale print options for Mantax Blue

  • 400mm: 950g/38oz
  • 500mm: 960g/38.4oz
  • 650mm: 1100g/44oz
  • 800mm: 1200g/48oz
  • 950mm: 1400g/56oz
  • 1020mm: 1500g/60oz
  • 1270mm: 1800g/72oz
  • 800mm with meter marker: 1300g/52oz
  • Box weight 200-350g/8-14oz.
Material Scale:  Alloy coated aluminum, non-reflecting.
Jaws: Detachable aluminum and steel. Jaws are normally approx. half of the scale graduated length and suitable for diameter measuring. For fish measuring models, jaws are approx 200mm/8” .
Classification: FPA, PTB.


Lengths Graduation
Mantax Blue 500 mm mm, Triple French Graduation in mm
Mantax Blue 600 mm mm, Triple French Graduation in mm
Mantax Blue 650 mm mm, Triple French Graduation in mm
Mantax Blue 800 mm mm, Triple French Graduation in mm
Mantax Blue 950 mm mm, Triple French Graduation in mm
Mantax Blue 1000 mm
Mantax Blue 1020 mm
Mantax Blue 1270 mm
Wildlife/fish measuring calipers with short jaws
Mantax Blue 1000 mm
Mantax Blue 1520 mm
Mantax Blue 1800 mm
Inch scales
Mantax Blue 18 inch Inch
Mantax Blue 24 inch Inch
Mantax Blue 30 inch Inch
Mantax Blue 36 inch Inch
Mantax Blue 40 inch Inch
Mantax Blue 50 inch Inch