FT0420 Wireless Thermometer
The FT0420 is a wireless thermometer system that measures indoor and outdoor temperature across a wide range, transmitting readings every 60 seconds over a 433MHz link. The outdoor sensor operates from -40 to +60 degrees C, with ±1 degree C accuracy, and uses two AAA alkaline or
What This Model Is For
The FT0420 is a wireless thermometer system that measures indoor and outdoor temperature across a wide range, transmitting readings every 60 seconds over a 433MHz link. The outdoor sensor operates from -40 to +60 degrees C, with ±1 degree C accuracy, and uses two AAA alkaline or lithium cells. The console displays both current and min/max temperature values, and can be placed freely or mounted on a wall. It is designed for integration into own-label weather stations and monitoring systems where battery-powered, long-range wireless data is needed.
- Measures indoor and outdoor temperature with a single sensor and console
- 60 second transmission interval provides timely updates without excessive battery use
- 100 meter open-air range supports placement across a typical house or garden
- Outdoor sensor operates from -40 to +60 degrees C, suitable for cold climates and hot environments
- ±1 degree C accuracy ensures reliable temperature tracking for monitoring and display
Product Images
Where It Is Used
- Home and office climate monitoring where temperature data is displayed on a wall console
- Greenhouse and cold storage monitoring for horticulture and food safety
- Outdoor temperature tracking in barns, sheds, or rooftop installations
- Retail and distribution centre environments needing remote temperature visibility
- Integrating temperature sensing into a larger own-label weather station system
Who It Is For
- Consumer electronics brands adding temperature monitoring to an existing weather station line
- Distributors replacing a wired sensor with a battery-powered alternative
- Agricultural integrators monitoring barn or greenhouse conditions
- HVAC and building services teams tracking temperature in unattended zones
- Cold chain logistics providers needing a simple, battery-powered temperature monitor
Problems It Solves
- Temperature sensors that require a wired connection and limit placement options
- Sensors that fail in extreme cold or heat due to narrow operating ranges
- Inaccurate readings from low-cost sensors with no min/max memory
- Long transmission intervals that miss temperature spikes or drops
- Systems that lack a clear separation between indoor and outdoor temperature data
Technical Features
- Measures indoor and outdoor temperature in degrees Celsius or Fahrenheit
- Records and displays min and max temperature values for both locations
- Transmits every 60 seconds over a 433MHz RF link
- Outdoor sensor operates from -40 to +60 degrees C with ±1 degree C accuracy
- Indoor sensor operates from 0 to +60 degrees C
- Uses 2 x AAA 1.5V alkaline or lithium batteries in both console and sensor
- LCD display size 52 x 41 mm for clear visibility
- Free-standing or wall-mountable console design
- Sensor model FT017T used in the system
Specifications
Values taken from our own product documentation. Anything we cannot verify is marked rather than estimated.
| Indoor Temperature Range | 0 to 60 degrees C |
|---|---|
| Outdoor Temperature Range | -40 to +60 degrees C |
| Temperature Accuracy | ±1 degree C |
| Transmission Frequency | 433 MHz |
| Transmission Interval | 60 s |
| Power - Console | 2 x AAA 1.5V alkaline batteries, not included |
| Power - Sensor | 2 x AAA 1.5V alkaline or lithium batteries, not included |
| Console Dimensions | 75 x 58 x 19 mm (H x W x D) |
| Sensor Dimensions | 75 x 53 x 20 mm (H x W x D) |
| LCD Dimensions | 52 x 41 mm (L x W) |
Figures we could not verify against our own published documentation are held back rather than printed: Transmission Range. Ask us and we will confirm them in writing.
Materials and Construction
- Moulded plastic housing for the console and sensor
- Weather sealed battery compartment sized for 2 x AAA cells
- Integrated LCD display with visible digits in both indoor and outdoor modes
How It Is Made
Console and sensor sub-assemblies are populated and soldered on our own assembly line
Housings are sealed and checked on rainfall and waterproof test equipment
Every unit is aged before leaving the factory
Quality Control
- Rainfall and waterproof testing on the assembled sensor and console
- Constant temperature and humidity chamber runs covering the -40 to +60 degrees C range
- Vibration testing to simulate transport and site mounting
- Smog ageing to assess housing and seal durability
- Final ageing test on every unit before packing
Customisation Options
- Own-label printing and retail packaging on request
- Console pairing to a customer's existing UCTECH-protocol display
- Alternative battery configurations (alkaline or lithium) on request
- Manual and quick start guide in the destination language
Compared With the Alternatives
vs Wired temperature sensors
No cabling required, but range is limited by wire length and installation effort
vs Sensors with longer transmission intervals
60 second updates capture temperature changes faster than 120 or 300 second systems
vs LoRa-based sensors
433MHz is simpler and lower cost; LoRa is better for long-range or multi-sensor networks
Use Guide
- Place the console in a central indoor location with clear line of sight to the sensor
- Mount the outdoor sensor at least 1.5 meters above ground, away from direct sunlight and heat sources
- Use lithium batteries in locations that drop below freezing
- Pair the sensor with the console before installing it outdoors
- Clear any debris from the sensor housing at the start of each season
FT0420 Wireless Thermometer Questions
What is the real range between the sensor and the console
100 meters in open air. Through walls, foliage, or a roof, expect around 30 meters, which covers a typical house and garden.
How often does it update
Every 60 seconds, which is frequent enough to track temperature changes without draining batteries too quickly.
Can I use lithium batteries in the sensor
Yes. Lithium cells are recommended for cold climates or long-term use, but alkaline cells are also supported.
Can it work with a console we already sell
If that console uses the UCTECH 433MHz protocol, yes. Send us the model and we will confirm before you order.
What is the lead time and minimum order
Tell us the quantity and target ship date and we will confirm both by email. Lead time depends on whether own-label printing and packaging are involved.
Which certifications does it carry
TBC. Ask us for the current certificate set for your destination market before you place the order.
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View Specifications →Request a Quote for the FT0420 Wireless Thermometer
Tell us the quantity, the destination market and whether you need own-label printing. We will confirm pricing, pairing and lead time in writing.