FT0421 Thermo-Hygrometer
The FT0421 Thermo-Hygrometer is a standalone indoor sensor that measures temperature from 0 to 60 degrees C and humidity from 10 to 99 percent RH, storing min and max values for both parameters. It displays readings on a 52 x 41 mm LCD and runs on two AAA 1.5V alkaline batteries.
What This Model Is For
The FT0421 Thermo-Hygrometer is a standalone indoor sensor that measures temperature from 0 to 60 degrees C and humidity from 10 to 99 percent RH, storing min and max values for both parameters. It displays readings on a 52 x 41 mm LCD and runs on two AAA 1.5V alkaline batteries. The unit is designed for placement on desks, shelves or walls without mounting hardware, making it suitable for retail, office and home use. It shares the same battery and display format as other UCTECH console devices, so it can be integrated into a product line that includes outdoor sensors and wireless consoles.
- Standalone operation with no need for a separate console or app
- Min and max tracking for temperature and humidity helps identify trends and anomalies
- Battery powered with two AAA cells, no wiring or charging required
- Compact size fits on small surfaces without taking up space
- Clear LCD display shows both temperature and humidity at a glance
Product Images
Where It Is Used
- Retail stores using it as a standalone display for climate monitoring in showrooms
- Offices where staff need to track indoor humidity levels for comfort and equipment safety
- Homes with sensitive electronics or plants that require stable indoor conditions
- Small warehouses or storage rooms where temperature and humidity must be logged
- Schools and community centres using it for environmental awareness displays
Who It Is For
- Consumer electronics brands adding a basic indoor monitor to a weather product line
- Distributors selling standalone climate monitors for home or office use
- HVAC integrators needing a low-cost sensor for indoor condition checks
- Retail chains using it as a point-of-sale environmental display
- Horticultural suppliers bundling it with indoor plant care kits
Problems It Solves
- Indoor climate monitoring that requires a wired connection or complex setup
- Sensors that cannot store historical min and max values, making trend analysis impossible
- Units that need a separate console or app to display readings, increasing cost and complexity
- Lack of a battery-powered option for temporary or mobile monitoring
- Inconsistent battery life due to high power draw from backlighting or wireless transmission
Technical Features
- Measures indoor temperature from 0 to 60 degrees C with 1 degree C accuracy
- Measures humidity from 10 to 99 percent RH with 5 percent accuracy
- Stores and displays min and max values for both temperature and humidity
- Powered by two AAA 1.5V alkaline batteries, not included
- LCD display size 52 x 41 mm, readable from a distance
- Free-standing design with no mounting hardware required
- No wireless transmission, so no RF interference or pairing needed
Specifications
Values taken from our own product documentation. Anything we cannot verify is marked rather than estimated.
| Temperature Range | 0 to 60 degrees C |
|---|---|
| Temperature Accuracy | plus or minus 1 degree C |
| Humidity Range | 10 to 99 percent RH |
| Humidity Accuracy | plus or minus 5 percent |
| Min Max Recording | Temperature and humidity |
| Power | 2 x AAA 1.5V alkaline batteries, not included |
| Display Size | 52 x 41 mm |
| Dimensions | 75 x 58 x 19 mm |
| Mounting | Free standing, no hardware required |
| Battery Life | TBC - depends on usage and battery type |
| Transmission | None - local display only |
Materials and Construction
- Moulded plastic housing for the console body
- Integrated battery compartment sized for 2 x AAA cells
- LCD screen with visible temperature and humidity values
How It Is Made
Console units are assembled on our own assembly line
LCDs are tested for clarity and backlight function before final assembly
Battery compartment is sealed and checked for correct fit
Every unit is ageing tested before it leaves the factory
Quality Control
- Constant temperature and humidity chamber runs to verify performance across the 0 to 60 degrees C and 10 to 99 percent RH range
- Vibration testing to simulate transport and handling
- Smog ageing to check for housing and seal degradation
- Final ageing test on every unit before packing
Customisation Options
- Own-label printing on the front and back of the console
- Retail packaging with custom branding and instructions
- Manual in the destination language on request
- Alternative battery type (e.g. lithium) available on request
Compared With the Alternatives
vs Wireless thermo-hygrometers with a console
No need for a separate console or app; lower cost and simpler setup, but no remote display or data logging
vs Wired indoor sensors
No cables to route or power sources to find, but no remote data access or integration with other sensors
vs Thermo-hygrometers with Bluetooth or Wi-Fi
No wireless protocol to manage or pairing to set up, but no data export or cloud access
Use Guide
- Place the unit in a central indoor location, away from direct sunlight and heat sources
- Ensure the battery compartment is closed securely to prevent battery leakage
- Replace batteries when the low power indicator appears, using only AAA 1.5V alkaline cells
- Reset min/max values by pressing the reset button if needed
- Clean the front surface with a dry cloth to avoid LCD damage
FT0421 Thermo-Hygrometer Questions
Does it need a console or app to work
No. It operates as a standalone device with local display and no wireless transmission.
How long do the batteries last
TBC. Battery life depends on usage and the type of batteries used. Lithium cells last longer than alkaline in cold conditions.
Can I reset the min and max values
Yes. There is a reset button to clear stored min and max readings for both temperature and humidity.
Is the display readable in low light
The LCD is designed for indoor use. It has no backlight, so visibility is best in well-lit areas.
Can I use lithium batteries instead of alkaline
Yes. Lithium AAA cells are compatible and recommended for long-term use or cold environments.
What 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 FT0421 Thermo-Hygrometer
Tell us the quantity, the destination market and whether you need own-label printing. We will confirm pricing, pairing and lead time in writing.