For a farm or utility trailer, the documented Grundig candidate is the 860 with TS external sensors, IP67 protection and suitable metal valve stems, subject to the fitter’s compatibility check. Choose it for the documented water/dust and trailer-profile features; no verified farm impact trial establishes that any cap sensor survives every gravel or mud condition.
What the 860 TS sensor documentation supports
The 860 instructions identify TS external sensors with an IP67 rating and replaceable CR1632 batteries. They recommend metal, brass or aluminium-alloy valve stems because external-sensor weight can flex rubber stems at speed. Have the fitter confirm stem and wheel suitability; inspect for physical damage and follow the specified leak-check and locking procedure before travel. A protected installation is part of the buying decision, not an invitation to improvise guards or modify a valve. IP67 addresses ingress under its rating conditions; it does not certify survival of every gravel strike or deep-mud event. For a frequently changed trailer, the same model documents stored profiles and independent axle settings: select the active trailer and check each mapped position before departure.
Check the feature that actually saves a repeat setup
The Grundig 860 listing describes 6–110 positions, monitoring up to 200 PSI, independent axle alarms and trailer-profile switching without re-pairing already assigned sensors. For multiple farm trailers, ask the seller to demonstrate the complete mapping and selection process for your vehicles. Confirm which sensors remain installed on each trailer and what the ordered package contains.
Compare the requirement that decides the purchase
| Scenario | Check | Purchase implication |
|---|---|---|
| Gravel and heavy mud | Check valve suitability, protected placement and cleaning limits | An IP rating does not establish unlimited impact or chemical resistance |
| Horse or livestock trailer | Map every monitored wheel and understand each alert | No TPMS is presented here as a guarantee against tipping |
| Different front and rear requirements | Demonstrate axle-specific settings on the proposed model | Use vehicle and tyre requirements, not a generic alarm number |
The S08 listing describes IP67 sensors; that is a specification, not an independent farm durability trial. Request replacement availability and the procedure after switching trailers. Before travel, confirm the active profile and each current wheel reading under the supplied instructions.
Specification and installation source
The Grundig model comparison describes separate pressure and wheel configurations. Manufacturer specifications are not field measurements made for this guide. Confirm the ordered variant, vehicle compatibility and installation instructions before buying.