Why This Instrument
The YMP-25 Yellow Mini Prism is designed for surveyors who need a practical field target that is easy to carry, quick to sight and accurate enough for demanding setout and monitoring tasks. Its 25 mm precision reflector supports reliable measurement up to 500 m, making it useful for construction crews, rail teams and civil surveyors working across Australian project sites.
This model is particularly suited to construction setout and monitoring applications where visibility, mounting flexibility and consistent prism constants matter. Compared with general-purpose mini prism targets, the YMP-25 is a stronger option for control and traverse work when a compact precision reflector is required.
What Sets It Apart
- 25 mm precision mini prism: Provides a compact optical target for accurate EDM measurements on construction, civil, rail and engineering survey work.
- Up to 500 m working range: Supports practical distance measurement across medium-range setout, monitoring and topographic survey tasks without needing a larger prism.
- High-visibility yellow housing: Helps field crews locate and sight the target faster on active construction sites, rail corridors, tunnels and busy civil environments.
- Leica and Trimble prism constants: Supports Leica +17.5 mm and Trimble -16.9 mm constants, helping surveyors apply the correct offset for accurate total station measurement.
- Copper or silver coated reflector options: Allows surveyors to select the reflector coating that best suits their instrument setup and measurement requirements.
- Lightweight 115 g design: Reduces load for handheld work and makes the prism easier to position during repeated setout, monitoring and topographic survey tasks.
- Leica spigot or 5/8-inch mounting options: Gives crews flexibility to mount the prism on compatible poles, brackets or monitoring setups depending on the site workflow.
- Robust construction for site use: The durable housing is suitable for civil, construction, rail and infrastructure environments where equipment is handled frequently in the field.
| Product | Yellow Mini Prism |
| Part number | YMP-25 |
| Prism Type | 25 mm precision mini prism |
| Primary Use | Construction setout, rail projects, tunnel monitoring, structural monitoring, topographic surveys and machine control support |
| Distance Measurement | Up to 500 m working range, suitable for medium-range total station work |
| Prism Constant — Leica | +17.5 mm |
| Prism Constant — Trimble | -16.9 mm |
| Reflector Options | Copper or silver coated reflector |
| Housing | High-visibility yellow housing for fast target acquisition on site |
| Weight | 115 g lightweight design |
| Mounting Options | Leica spigot or 5/8-inch mounting options |
| Compatible Instruments | Suitable for use with Leica, Trimble, Topcon and Sokkia total stations when the correct prism constant is applied |
What’s Included
- Yellow Mini Prism YMP-25
- Selected reflector option: copper or silver coated reflector
- Selected mounting option: Leica spigot or 5/8-inch mounting configuration
Works With
The Yellow Mini Prism YMP-25 works with a wide range of total stations used across Australian surveying, construction, rail and civil projects, including:
- Leica total stations using the correct +17.5 mm prism constant
- Trimble total stations using the correct -16.9 mm prism constant
- Topcon total stations with the correct user-applied prism constant
- Sokkia total stations with the correct user-applied prism constant
- Construction setout workflows
- Rail and tunnel monitoring setups
- Structural monitoring applications
- Topographic survey and machine control support tasks
Australian Support
Terra360 supplies survey equipment for Australian construction, civil, rail, mining and infrastructure teams, with local support before and after purchase. The YMP-25 Yellow Mini Prism is backed by the applicable Australian warranty terms for this product, with Terra360 acting as your point of contact for warranty, compatibility and product support.