

The Echo TM-850S GPS-RTK is a compact professional mower built for precise strip-pattern cutting across sports fields, schools, and managed turf areas. It covers up to 30,000 m² with full GPS-RTK accuracy, maintaining consistent results without the need for boundary wires.
Lightweight, quiet, and efficient, the TM-850S delivers professional results where space or access limits the use of larger machines. Autonomow supplies the TM-850S with full UK setup, calibration, and support to ensure every installation performs to commercial standards.
- GPS-RTK guided robotic mower
- Handles up to 30,000 m² (7.4 acres) with precision strip-pattern mowing
- Two floating heads and six stainless steel blades for a consistent professional cut
- Autonomous 24/7 operation with automatic charging and remote control
- Quiet 52 dB performance for day or night use
- Low 400 kWh annual consumption – efficient and zero-emission
- Light 25 kg build for minimal turf impact and easy handling
- App and web portal for live tracking, scheduling, and performance monitoring
- Supplied with a 2-year commercial warranty
Product Specification
Compact Precision for Professional Lawns
The Echo TM-850S GPS-RTK brings advanced robotic mowing to smaller sports fields and managed lawns. Using GPS-RTK guidance, it delivers perfect, repeatable strip patterns without boundary wires. With 2 floating heads and 6 stainless steel blades, it produces an even, mulched finish while maintaining efficient energy use.
Accuracy Without Boundaries
Guided by GPS-RTK with Wisenav® technology, the TM-850S works to within 2 cm accuracy. Operators can define zones, patterns, and no-go areas directly through the Echo web portal or mobile app. The mower navigates precisely without physical boundaries, making setup faster and more flexible for multi-field or irregular sites.
Made for Schools and Sports Facilities
Compact yet capable, the TM-850S is built for smaller sports pitches, school grounds, and training areas up to 30,000 m². Its 52 dB noise level allows continuous mowing during lessons or overnight without disruption, and its 25 kg chassis ensures gentle operation on turf, even in damp conditions.
Smart Management and Reliable Support
Through the Echo portal and app, teams can monitor mowing progress, check maintenance logs, and adjust settings remotely. Groundtech provides full UK installation, RTK base setup, and calibration support, ensuring every TM-850S performs reliably from day one.
Recommended Accessories
- GPS-RTK Base Station (Wi-Fi or 4G)
- Virtual boundary licence
- Charging station weather cover
- Replacement blades and head assemblies
- Autonomow setup, calibration, and service plan
Technical Specifications
| Specification | Detail |
|---|---|
| Maximum Working Area | 30,000 m² |
| Recommended Working Area | 22,000 m² |
| Maximum Slope | 30% |
| Cutting Width | 42 cm |
| Cutting Height Range | 20 – 70 mm |
| Cutting Heads | 2 floating |
| Blades | 6 stainless steel |
| Navigation System | GPS-RTK with Wisenav® |
| Weight | 25 kg |
| Dimensions (L × W × H) | 87 × 70 × 32 cm |
| Maximum Noise Level | 52 dB |
| Battery Type | LiFePO₄ |
| Battery Capacity | 8.55 Ah |
| Battery Voltage | 25.6 V |
| Average Charging Time | 55 minutes |
| Average Mowing Duration per Charge | 120 minutes |
| Average Annual Power Consumption | 400 kWh |
| Power Source | Electric (rechargeable) |
| Operation | Autonomous with app and web portal control |
| Warranty | 2 years commercial |
Shipping and Returns Policy
Shipping Policy:
- Processing Time: Orders are processed and shipped within 1-2 business days after the order is placed, excluding weekends and holidays.
- Shipping Methods: We offer several shipping methods to accommodate your needs. These may include standard shipping, expedited shipping, and international shipping options. The available shipping methods will be displayed during the checkout process.
- Shipping Costs: Shipping costs vary depending on the shipping method selected, the weight of the package, and the destination. Shipping costs will be calculated and displayed during the checkout process before payment is required.
- Tracking Information: Once your order has been shipped, you will receive a shipping confirmation email containing tracking information so you can monitor the status of your delivery.
- Delivery Time: Delivery times vary depending on the shipping method selected and the destination. Estimated delivery times will be provided during the checkout process and are based on the carrier's estimated delivery times.
- Shipping Restrictions: We currently only ship to addresses within the United Kingdom. We do not ship to P.O. boxes.
- Damaged or Lost Shipments: In the rare event that your order is damaged during shipping or lost in transit, please contact our customer service team immediately so we can assist you in resolving the issue.
Returns Policy:
- Return Eligibility: We want you to be completely satisfied with your purchase. If you are not satisfied for any reason, you may return the item(s) within 30 days of delivery for a full refund or exchange, provided the item(s) are in their original condition and packaging.
- Return Process: To initiate a return, please contact our customer service team to request a return authorization (RA) number. Returns will not be accepted without a valid RA number. Once your return is authorized, you will receive instructions on how to return the item(s) to us.
- Return Shipping: The cost of return shipping is the responsibility of the customer, unless the return is due to an error on our part (e.g., wrong item shipped, damaged item). We recommend using a trackable shipping method and purchasing shipping insurance to ensure the safe return of your item(s).
- Refund Processing: Refunds will be issued to the original method of payment within 5-7 business days of receiving the returned item(s). Please note that original shipping charges are non-refundable.
- Exchanges: If you would like to exchange an item for a different size, color, or style, please indicate the desired exchange on the return authorization form. Exchanges will be processed once the returned item(s) are received and inspected.
- Defective or Damaged Items: If you receive a defective or damaged item, please contact our customer service team within 7 days of delivery to arrange for a replacement or refund.
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