SD1 3-in-1 Fridge & Freezer Monitor
The SD1 combines dedicated probes for refrigerator temperature and humidity, freezer temperature, and door status in one LCD-equipped device.
SD1 3-in-1 Fridge & Freezer Monitor
The SD1 combines dedicated probes for refrigerator temperature and humidity, freezer temperature, and door status in one LCD-equipped device.
Core Functions
- Monitors refrigerator temperature and humidity through a dedicated probe.
- Monitors freezer temperature and door open/closed status through separate probes.
- Stores up to 168 hours of data while offline and synchronizes it after reconnection.
Product Appearance
The diagram identifies the front, rear, and under-cover connection points, including the three color-coded probe sockets.

Specifications
| Specification | Details |
|---|---|
| Model | SD1 |
| Wireless Connection | Bluetooth LE |
| Wireless Range | Up to 230 ft (70 m), line-of-sight |
| Display | Segment LCD with white backlight |
| Battery | Rechargeable lithium battery, 3.7 V, 2000 mAh |
| Charging Input | USB-C, 5 V / 1 A |
| Expected Battery Life | More than 2 years |
| Offline Data Storage | Up to 168 hours |
Probe Specifications
| Probe | Sensor | Measurement Range | Accuracy / Status |
|---|---|---|---|
| Temperature & Humidity Probe (green) | Sensirion SHT40 | Temperature: -40°F to 221°F (-40°C to 105°C); humidity: 0% to 100% RH | Temperature: ±0.5°F (±0.3°C); humidity: ±3% RH |
| Temperature Probe (blue) | NTC thermistor | -40°F to 221°F (-40°C to 105°C) | ±0.9°F (±0.5°C) |
| Door Sensor Probe (yellow) | Magnetic contact sensor | Door state | Open / Closed |