La Crosse Technology Wireless Temperature & Humidity Sensor TX141TH-BV4 — Weather‑Resistant, 330 ft Range

The La Crosse TX141TH-BV4 is a battery-powered, weather-resistant wireless sensor that reports outdoor temperature and humidity to compatible La Crosse weather stations up to 330 feet away.

This compact transmitter delivers fast, accurate outdoor readings using a 433 MHz signal and a rugged case designed to withstand typical exterior conditions. It’s intended to be mounted in shaded, well-ventilated locations—preferably under eaves or deck rails—and must be positioned vertically to allow moisture to drain. The sensor operates across extreme temperatures and broad humidity ranges and pairs with specific La Crosse clocks and weather stations for live remote monitoring.

How accurate are the temperature and humidity readings?

The TX141TH-BV4 provides reliable outdoor measurements across wide environmental ranges and reports quickly to a paired display. Accuracy depends on correct placement—avoid direct sunlight and poor ventilation to prevent artificially high temperatures.

• Temperature range: -40°F to 140°F (-40°C to 60°C)
• Humidity range: 10% to 99% RH
• Fast 433 MHz transmission for near-real-time updates
• Weather-resistant housing to shield the sensor from rain and wind

How far can the sensor transmit signal to my weather station?

In open air, the transmitter reaches roughly 330 feet (100 meters) to the indoor display, allowing flexible placement around most properties. Walls, roofs, and other obstructions will reduce that distance, so test locations if you experience intermittent reception.

• Nominal range: 330 ft / 100 m in unobstructed conditions
• Performance decreases with concrete, metal, or multiple walls
• Place the receiver centrally in the house for best coverage
• Reposition sensor vertically to keep antenna orientation optimal

Which La Crosse devices is this sensor compatible with?

This transmitter is built to work with a range of La Crosse clock and weather station models that accept TX141TH-B series sensors. Verify compatibility before purchase; it’s backward compatible with earlier TX141TH-B versions (v1–v3) but does not pair with non-La Crosse systems unless explicitly listed.

• Compatible with select models such as 308-1414B, 308-1414W, 308-1711BL
• Also compatible with model numbers C85845, L78571, S75617 and others
• Backwards compatible with TX141TH-B variants (v2, v3)
• Not compatible with unrelated brands or unsupported station models

What are the installation and power requirements?

Installation is straightforward: mount the sensor vertically in a shaded spot, ideally 6–18 inches under eaves or beneath a deck rail. It runs on two AA batteries (not included) and should be placed where it can drain moisture and avoid direct sun exposure for the most accurate readings.

• Power: 2 × AA batteries (user-supplied)
• Mount vertically for drainage; recommended under eaves or deck rail
• Avoid north-exposed unshaded walls; keep out of direct sunlight
• Weather-resistant case but not fully submersible—sheltered mounting advised

Who this is for: The TX141TH-BV4 is designed for homeowners, hobby meteorologists, and anyone with a compatible La Crosse indoor display who wants dependable remote outdoor temperature and humidity data. It’s a practical upgrade for older TX141TH-B sensors, a convenient replacement unit, or a secondary sensor to monitor specific outdoor zones like gardens, patios, or storage areas. If you need a rugged, battery-operated external sensor that integrates with La Crosse stations and tolerates wide ambient ranges, this model is a solid option.