Leica Style

GDF121M Tribrach without Optical Plummet

$190.39
4.5

Contact us for the best deal on this product.


The GDF121M Tribrach without Optical Plummet is a lightweight yet sturdy mounting device, compatible with Leica TPS and other similar surveying instruments. With an 8' circular vial and a standard 5/8x11 thread, it provides secure attachment and precise leveling for surveying applications in various situations.

Secure Payments
American Express
Apple Pay
Diners Club
Discover
Google Pay
Mastercard
Shop Pay
Visa
  • Quick worldwide shipping with trusted carriers
  • Multiple safe payment options for peace of mind
  • Professional advice to choose the right equipment
  • 24/7 premium customer assistance

Product Information

Professional Tribrach for Precise Instrument Mounting

The GDF121M tribrach delivers reliable instrument mounting for professional surveyors who demand precision without the complexity of optical plumbing systems. Built for compatibility with Leica TPS and similar surveying instruments across diverse field conditions.


Universal Compatibility

Engineered with standard 5/8x11 threading to ensure seamless compatibility with Leica TPS systems and other major surveying instruments. This universal approach eliminates compatibility concerns and reduces the need for multiple mounting accessories in your equipment kit.

Precision Leveling System

The integrated 8-minute circular vial provides accurate leveling reference for optimal instrument positioning. This precision bubble system ensures your measurements maintain the highest accuracy standards, even when working on uneven terrain or challenging survey sites.


Key Advantages

  • Lightweight construction reduces equipment load without sacrificing stability
  • Streamlined design eliminates optical plummet complexity for faster setup
  • Durable materials withstand demanding field conditions and frequent use
  • Cost-effective solution for projects not requiring optical centering
  • Standard threading ensures broad instrument compatibility across manufacturers

Model: GDF121M

Compatible: Leica TPS & other surveying instruments

Circular Vial: 8' accuracy

Thread: 5/8x11 standard mounting thread

Color: Leica Green

Weight: 1.80 lbs.

Features :

Universal Compatibility

Standard 5/8x11 thread fits Leica TPS and most major surveying instruments

Precision Leveling

8' circular vial provides accurate leveling for consistent measurement accuracy

Lightweight Design

Optimized weight reduces fatigue during extended field operations

Secure Mounting

Robust construction ensures stable instrument attachment in all conditions

Field Durability

Weather-resistant materials withstand harsh surveying environments

Cost-Effective Solution

Essential tribrach functionality without optical plummet for budget-conscious projects

Download Center
Reviews :
4.8/5
★★★★★
Based on verified reviews
★★★★★
Marcus Rodriguez
Senior Land Surveyor · Verified Purchase
Excellent Build Quality and Compatibility
This tribrach has exceeded expectations with our Leica TS16 total station. The 8' circular vial provides precise leveling, and the construction feels solid despite the lightweight design. Perfect for extended field work where equipment weight matters.
★★★★★
Sarah Chen
Project Engineer · Verified Purchase
Reliable Performance in Demanding Conditions
Used this tribrach on a challenging topographic survey in variable weather conditions. The threading mechanism operates smoothly, and the vial maintains accuracy even after rough transport. Highly recommend for professional applications.
★★★★★
David Thompson
Geospatial Technician · Verified Purchase
Cost-Effective Solution Without Optical Plummet
For projects where optical plummet isn't required, this tribrach offers excellent value. The standard 5/8x11 threading ensures compatibility with our existing equipment setup. Sturdy construction that handles daily field use exceptionally well.
★★★★☆
Jennifer Walsh
Survey Crew Chief · Verified Purchase
Solid Performance with Minor Considerations
The tribrach performs well for standard surveying tasks, though the absence of optical plummet requires alternative centering methods. Build quality is impressive for the price point, and the leveling mechanism responds accurately to adjustments.
★★★★★
Robert Kim
Principal Surveyor · Verified Purchase
Professional Grade Quality at Competitive Price
This tribrach has become a reliable component in our instrument collection. The lightweight design reduces fatigue during long survey sessions, while maintaining the precision required for boundary and construction surveys. Excellent investment for any surveying operation.

What's in the Box

Everything you need to get started.

  • GDF121M Tribrach Assembly
  • 8-Minute Circular Bubble Vial
  • 5/8×11 Thread Mounting Base
  • User Manual

Note: Optical plummet, tripods, and surveying instruments sold separately.

Frequently Asked Questions

General
What instruments are compatible with the GDF121M Tribrach?
The GDF121M is specifically designed for compatibility with Leica TPS series instruments and other surveying equipment utilizing the standard 5/8x11 threading system. This makes it suitable for most professional total stations and theodolites from various manufacturers.
How do I level the tribrach without an optical plummet?
The GDF121M features an 8-minute circular bubble vial for precise leveling. Use the three leveling screws to center the bubble in the circular vial. For horizontal positioning over survey points, rely on your instrument's built-in laser plummet or use external centering methods such as a plumb bob or separate optical plummet.
What are the weight specifications and construction materials?
The GDF121M is engineered as a lightweight yet robust mounting solution, constructed from high-grade aluminum alloy for optimal durability while minimizing field transport weight. The precise weight specifications and detailed material composition are available in the technical documentation provided with the unit.
Can this tribrach be used with different tripod systems?
Yes, the GDF121M features the industry-standard 5/8x11 thread pattern, making it compatible with most professional surveying tripods including wood, aluminum, and carbon fiber models from major manufacturers. This universal threading ensures versatile field deployment across different equipment configurations.
What maintenance is required for optimal performance?
Regular maintenance includes cleaning the tribrach body and leveling screws with appropriate solvents to remove dirt and debris. Periodically inspect the circular vial for proper bubble movement and accuracy. Store in protective carrying case when not in use and avoid impact damage to maintain the precision of the leveling mechanism.

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