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GeoMax ZTM100 Reflective Tape

Image of GeoMax ZTM100


The GeoMax ZTM100 is a self-adhesive reflective target 6 x 6 cm. For measurement of surfaces with standard EDM.

The ZTM100 Self-Adhesive Reflective Tape is an ideal Survey Target designed for easy, faster, more accurate construction layout. Used in Surveying and Construction on the field by Engineers and Contractors, for adding high reflectivity targets to any surface.


Height Offset:0.0 mm
Absolute constant: +0.00 mm
Leica constant: +34.40 mm
Dimensions (W x H x D):60x60x1 mm


Below is a table with approximate prism ranges, based on atmospheric conditions.

Surveying Prism PoorGoodBest
ZPR100 Standard Prism 1800m3000m3700m
3x ZPR100 Prisms2300m4500m5400m
ZRP1 & GRZ122 360° Prisms800m1500m2100m
Leica GRZ101 360° Mini Prisms500m800m1000m
ZMP100 & ZMP101 Mini Prisms800m1200m2100m
→ ZTM100 Reflective Tape200m200m200m

Atmospheric conditions are defined as:

  • Poor – Strong haze & 5km visibility or strong sunlight with severe heat shimmer
  • Good – Light haze & visibility about 20 km or moderate sunlight with slight heat shimmer
  • Best – Overcast, no haze, visibility about 40 km & no heat shimmer.

GeoMax ZTM100 FAQ

Below is a list of frequently asked questions about GeoMax ZTM100.

What is the prism constant for the GeoMax ZTM100?

The absolute prism constant (true value) for the GeoMax ZTM100 is 0.0mm. The prism constant as defined for Leica instruments for GeoMax ZTM100 is 34.4mm. For a more detailed explanation on prism constants please see this article.

Can I use the GeoMax ZTM100 with a Leica instrument?

Yes, you can use the prism with a Leica instrument as long as you set up the correct prism constant in the instrument settings.

What is the prism constant value that I need to use with a Leica instrument?

In order to use the GeoMax ZTM100 with a Leica instrument you should use 34.4mm as the prism constant value.

What is the height offset of the GeoMax ZTM100?

The GeoMax ZTM100 height offset is 0.0mm. This is measured from the mounting point to the centre of the prism.