Topcon Style

Topcon Yellow Survey Circular Prism

$148.17
4.83

Contact us for the best deal on this product.


The Topcon Yellow Circular Prism delivers 100mm height offset, -30/0mm prism constant, and durable metal construction for precision surveying. It comes with a carrying bag for portability and secure storage, ensuring superior performance in the field.

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Product Information

Professional Survey Prism for Precision Measurement

The Topcon Yellow Survey Circular Prism delivers consistent accuracy for professional surveyors demanding reliable measurements across diverse field conditions. Built with precision-engineered optics and robust construction for long-term field use.


Precision Engineering

Engineered with a 100mm height offset and -30/0mm prism constant, this circular prism ensures measurement consistency across different total station configurations. The 5 arcsecond beam deviation specification provides the precision balance needed for both routine surveys and critical measurement applications.

Field-Ready Durability

Constructed with durable metal housing to withstand demanding field conditions while maintaining optical integrity. The included carrying bag ensures secure transport and storage, protecting your investment between job sites and extending service life.


Key Advantages

  • Standard 100mm offset eliminates measurement corrections
  • Wide circular design increases target acquisition speed
  • Consistent -30/0mm prism constant across instruments
  • Protective carrying bag included for field mobility
  • Metal construction withstands harsh environmental conditions

Model: Topcon Circular Prism

For Total Station: Topcon-compatible

Height Offset: 100.0mm

Prism Constant: -30/0mm

Beam Deviation: 5 arcseconds

Material: Metal

Carrying Bag: Yes

Features :

100mm Height Offset
Precise 100mm offset ensures seamless integration with total stations and survey systems.
-30/0mm Prism Constant
Dual constant options provide flexibility for various measurement requirements.
Premium Metal Construction
Robust metal housing withstands harsh field conditions and heavy daily use.
High-Visibility Yellow Design
Bright yellow color ensures easy visibility and target acquisition in all conditions.
Superior Reflectivity
Enhanced reflective surface delivers accurate readings at extended distances.
Protective Carrying Bag
Includes durable carrying case for secure transport and professional storage.
Circular Prism Design
Standard circular configuration ensures compatibility with all major survey instruments.
Professional Grade Quality
Topcon engineering delivers the precision and reliability professionals demand.
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Reviews :
4.8/5
★★★★★
Based on verified reviews
★★★★★
Michael Rodriguez
Senior Land Surveyor · Verified Purchase
Outstanding Precision and Build Quality
This Topcon circular prism has exceeded expectations in terms of accuracy and durability. The -30/0mm prism constant provides consistent results across various measurement scenarios, and the 100mm height offset is perfect for our standard pole configurations. The robust metal construction has withstood harsh field conditions without any degradation in performance.
★★★★★
Sarah Thompson
Construction Project Manager · Verified Purchase
Reliable Performance in Demanding Environments
We've been using this prism for large-scale construction layout work and it consistently delivers accurate measurements. The yellow coating provides excellent visibility even in challenging lighting conditions, and the included carrying bag ensures safe transport between job sites. Highly recommend for professional applications requiring dependable reflectance.
★★★★☆
David Chen
Civil Engineering Technician · Verified Purchase
Solid Choice for Routine Survey Work
This prism performs well for our daily topographic and boundary surveys. The metal construction feels sturdy and the optical quality is excellent for our Topcon total station setup. The only minor issue is that the carrying bag could have better padding, but overall it's a reliable piece of equipment that integrates seamlessly with our existing workflow.
★★★★★
Jennifer Walsh
Geodetic Surveyor · Verified Purchase
Exceptional Accuracy for Precision Measurements
The precision of this circular prism is remarkable for control network establishment and cadastral surveys. The consistent prism constant allows for reliable distance measurements without the need for frequent calibration checks. The bright yellow finish maintains excellent reflectivity over extended use, making it an invaluable tool for high-accuracy surveying applications.
★★★★★
Robert Martinez
Principal Surveyor · Verified Purchase
Professional Grade Equipment at Its Best
After 18 months of regular use across multiple projects, this prism continues to deliver exceptional performance. The durable construction has withstood drops and rough handling typical in field environments, while maintaining optical clarity and measurement accuracy. The protective carrying case is a thoughtful addition that extends the equipment's longevity.

What's in the Box

Everything you need to get started.

  • Topcon Yellow Circular Prism Assembly
  • Metal Prism Holder with 100mm Height Offset
  • Protective Carrying Bag

Note: Prism pole and other mounting accessories sold separately.

Frequently Asked Questions

General
What is the prism constant for this circular prism?
The Topcon Yellow Circular Prism features a prism constant of -30/0mm, which ensures accurate distance measurements when used with compatible total stations and EDM instruments. This constant must be properly configured in your surveying instrument for precise calculations.
What is the height offset specification?
This prism provides a 100mm height offset from the mounting point to the optical center. This standardized offset allows for consistent elevation measurements and must be accounted for in your surveying calculations to ensure accurate vertical positioning.
Is this prism compatible with all total station brands?
Yes, the Topcon Yellow Circular Prism is designed to work with total stations and EDM instruments from all major manufacturers, including Topcon, Leica, Trimble, Sokkia, and others. The standard circular design and reflective properties ensure universal compatibility across different surveying platforms.
What construction materials are used for durability?
The prism features robust metal construction designed to withstand harsh field conditions, temperature variations, and regular handling. The durable housing protects the optical elements while maintaining precision reflective properties, ensuring long-term reliability in professional surveying applications.
What accessories are included with the prism?
The prism comes with a dedicated carrying bag that provides protection during transport and secure storage when not in use. This padded case helps prevent damage to the optical surfaces and ensures the prism remains calibrated and ready for field deployment.

Still have questions? Contact our technical support team.

This Shipping & Delivery Policy applies to orders placed through metricop.com and to quotations, proforma invoices and sales confirmations issued by Surveying Equipment Metricop LLC (“Metricop”, “we”, “us” or “our”), unless another selling entity or different shipping terms are expressly identified in the applicable quotation or invoice.

If a quotation, proforma invoice or written sales confirmation contains shipping terms that differ from this Policy, the terms in that document will control. Nothing in this Policy limits any mandatory rights available to a Consumer under applicable law.

1. Order acknowledgement and acceptance

An automated order confirmation only confirms that we have received the order. It does not constitute final acceptance of the order or confirmation of product availability.

An order is accepted when Metricop sends a written order acceptance or dispatch confirmation, or otherwise expressly confirms acceptance in writing.

Before acceptance, we may verify:

  • product availability;

  • price and specification accuracy;

  • payment status;

  • shipping address;

  • export or import restrictions;

  • compatibility or configuration information; and

  • suspected fraud or payment risk.

If we cannot accept an order, any payment already received will be returned using the original payment method.

2. Availability and shipping origin

Products may be dispatched from Metricop stock, a logistics partner, an authorised supplier or a manufacturer warehouse. The shipping country may therefore differ from Metricop’s registered business address.

Orders containing several products may be shipped in separate packages and may arrive on different dates.

Stock information is based on the information reasonably available when the order is placed and may change before final order acceptance. Products described as available, in stock or supplier stock are subject to final verification.

3. Processing and delivery estimates

Any processing, dispatch, transit or delivery time displayed on the website, quotation, invoice, order confirmation or tracking page is a good-faith estimate only, unless Metricop expressly confirms a guaranteed date in writing.

Where the website states “Estimated delivery: 4–7 business days,” this means the typical estimated delivery period for eligible in-stock orders after payment and order verification. It is not a guaranteed arrival date.

Delivery estimates may be affected by:

  • stock or supplier availability;

  • technical configuration or testing;

  • calibration or certification;

  • payment verification;

  • customer response time;

  • export documentation;

  • destination and remote-area service;

  • carrier capacity;

  • customs clearance;

  • import inspections;

  • public holidays, weather or other events outside our reasonable control.

Business days exclude weekends and public holidays applicable at the dispatch location, carrier hubs or destination.

If delivery by a particular date is essential, the Buyer must contact Metricop before placing or paying for the order. A requested date, project deadline or “required delivery” field does not become binding unless Metricop expressly accepts it in writing as a guaranteed delivery date.

If a material delay occurs, we will provide an updated estimate and any cancellation or refund options required by applicable law.

4. Shipping methods and charges

Shipping methods and charges depend on the product, destination, value, dimensions and required service.

Where “free shipping” or “shipping included” is stated, it covers only the standard transportation service expressly included in the order. Unless stated otherwise, it does not include:

  • customs duties, import VAT or local taxes;

  • brokerage or clearance fees;

  • remote-area or address-correction surcharges;

  • storage, demurrage or redelivery charges;

  • special permits or inspections;

  • return transportation; or

  • cargo insurance exceeding the carrier’s standard liability.

If an additional shipping charge becomes necessary before dispatch, we will request the Buyer’s approval. The order will not be dispatched with an unapproved material additional charge.

5. Customs, duties and importer responsibilities

Unless an order is expressly confirmed as DDP – Delivered Duty Paid, the recipient is responsible for customs clearance, import duties, VAT, taxes, brokerage charges and other destination-country costs.

The recipient may be treated as the importer of record and is responsible for providing accurate identification, tax numbers, permits and other information requested by customs authorities or the carrier.

Customs clearance time is outside Metricop’s direct control and is not included in any estimated delivery period unless expressly stated.

Metricop will not declare an incorrect value, description or country of origin or identify commercial goods as gifts.

6. Shipping addresses and delivery attempts

The Buyer is responsible for providing a complete and accurate delivery address, contact person, telephone number and any required customs information.

A request to change the address after order acceptance may result in delay, additional charges or cancellation if the shipment can no longer be redirected safely.

Delivery may require a signature. Delivery to the address, reception desk, mailroom, site office or person reasonably appearing authorised to receive the shipment will normally constitute delivery.

7. Risk of loss

For Consumers, risk of loss remains with Metricop until the Consumer or a person designated by the Consumer takes physical possession of the goods, where required by applicable law.

For Business Customers, the Incoterm stated in the quotation or invoice controls. If no different Incoterm is stated and Metricop arranges and prepays transportation, the order is shipped CPT Buyer’s delivery address, Incoterms® 2020. Risk passes to the Business Customer when the goods are handed to the first carrier, even though Metricop pays transportation to the stated destination.

Unless expressly included, cargo insurance beyond the carrier’s standard liability is not provided. Business Customers may request additional cargo insurance before order acceptance.

8. Inspection and transit damage

The recipient should inspect the shipment immediately upon delivery.

Visible external damage, missing packages or suspected tampering should be noted on the carrier’s delivery record. Photographs of the package, labels, contents and serial numbers should be taken before packaging is discarded.

Business Customers must notify Metricop of visible shipping damage, shortages or an incorrect product within five business days after delivery. Notification should include:

  • order or invoice number;

  • tracking number;

  • description of the issue;

  • photographs or video;

  • product and package labels; and

  • applicable serial numbers.

Failure to notify us promptly may prevent recovery from the carrier and may affect a Business Customer’s claim to the extent permitted by law. This does not limit non-waivable Consumer rights.

The recipient must retain all original packaging until Metricop confirms that it may be discarded.

9. Delayed, lost or misrouted shipments

Tracking information and carrier estimates are not guarantees.

If a shipment appears lost or materially delayed, please contact Metricop so that we can open a carrier investigation. Carrier investigations may require information or documents from the recipient.

For Business Orders where risk has already passed to the Buyer, Metricop’s assistance with a carrier claim does not mean that Metricop has reassumed the risk of loss.

10. Refused and undeliverable shipments

A Business Customer’s refusal to accept a conforming shipment, failure to provide customs information or failure to pay import charges does not constitute an authorised cancellation.

Actual return freight, storage, customs, brokerage, redelivery and other non-recoverable costs may be deducted from any amount otherwise refundable to a Business Customer.

Consumer rights regarding refused or undelivered shipments remain subject to applicable mandatory law.

11. Events outside our reasonable control

Metricop is not responsible for delays caused by events outside its reasonable control, including carrier disruption, customs action, export restriction, government order, labour dispute, natural disaster, severe weather, war, civil disturbance, epidemic, cyber incident, supplier interruption or infrastructure failure.

For Business Customers, Metricop is not liable for project delay, downtime, lost profit, substitute-equipment costs or other indirect or consequential loss resulting from a delivery delay, except where liability cannot lawfully be excluded.

12. Contact

Questions regarding shipping should be sent to:

Surveying Equipment Metricop LLC
30 North Gould Street
Sheridan, WY 82801, USA
Email: sales@metricop.com