Description
The FY-11 is a miniature digital thermo-hygrometer designed for embedded panel mounting in refrigerators, wine cabinets, incubators, terrariums, and other environments where continuous temperature and humidity monitoring is required. Unlike the FY-10 and FY-12 variants that use external probes, the FY-11 has built-in sensors located directly inside the housing, making it a self-contained unit with no cables .
The device is housed in a compact ABS plastic enclosure measuring approximately 48 × 28.6 × 15.2mm, with an embedded cutout size of approximately 46 × 27mm for flush panel installation . The LCD displays both temperature and humidity simultaneously, with 0.1°C temperature resolution and 1% RH humidity resolution . The unit is powered by two LR44/AG13 button cells (included in most listings), and the humidity sampling interval is approximately 10 seconds .
The FY-11 is available in black and white housing variants . Temperature range extends from -50°C to +70°C with ±1°C accuracy, and humidity from 10% to 99% RH with ±5% RH accuracy .
Critical limitations: This is a low-cost, non-certified thermo-hygrometer intended for consumer and light commercial use. It is not a data-logging device and cannot connect to microcontrollers. The built-in sensors mean the device measures the air temperature/humidity immediately surrounding the housing—it cannot measure inside a sealed compartment unless the entire unit is placed there. The housing is not waterproof .
Features
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Dual Temperature & Humidity Display: Simultaneous LCD readout of both measurements .
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Built-in Sensors: No external probe or cable; sensors are integrated inside the housing .
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Compact Embedded Design: 48×28.6×15.2mm body with ~46×27mm cutout for flush panel mounting .
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Wide Temperature Range (-50°C to 70°C): Suitable for freezers, refrigerators, and general indoor monitoring .
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10-Second Humidity Sampling: Provides reasonably responsive updates .
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0.1°C Temperature Resolution: Clear LCD readout with decimal precision .
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Low Power Consumption: Two LR44/AG13 button cells provide extended operation .
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Available in Black or White: Housing color options for different installations .
Technical Specifications
| Parameter | Specification (most commonly cited) |
|---|---|
| Model | FY-11 |
| Temperature Range | -50°C to +70°C |
| Temperature Accuracy | ±1°C (some sources list ±3°C) |
| Temperature Resolution | 0.1°C |
| Humidity Range | 10% to 99% RH |
| Humidity Accuracy | ±5% RH |
| Humidity Resolution | 1% RH |
| Sampling Interval | ~10 seconds |
| Power Supply | 2× LR44/AG13 button cells |
| Body Dimensions | Approx. 48 × 28.6 × 15.2mm |
| Cutout Dimensions | Approx. 46 × 27mm |
| Sensor Type | NTC 10K/3435 (temperature) |
| Housing Color | Black or White |
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