
Beurer basal thermometer OT 20
Ovulation thermometer for pregnancy or cycle tracking – compatible with the “Ovy” app
Family and life planning in harmony: natural methods for cycle tracking and purposeful family planning can be easily implemented. The modern temperature measurement technology of Beurer basal thermometers work in conjunction with a cycle tracking app to offer entirely new possibilities for predicting fertile and non-fertile days more reliably.
- Display to 2 decimal places
- Use with the “Ovy” app for natural cycle tracking1)
- Contact-measurement technology
- Suitable for oral & vaginal measurements
- Flexible measuring tip
- Waterproof
- Can be disinfected
- Measurement accuracy: ±0.05°C at 35.00°C - 38.00°C (ambient temperature 18.00°C - 28.00°C) in remaining measurement range: ± 0.1°C
- 1 memory space
- Automatic switch-off
- Acoustic signal when measurement is complete
- Medical device
- With protective cap
- Free download of the “Ovy” app
1) Manual recording of temperature

Key Features
Technical specifications
Acoustic signal | yes |
Automatic switch-off | yes |
Battery-operated | yes |
CE | yes |
Can be disinfected | yes |
Connect | no |
Low battery indicator | yes |
Measurement accuracy | ±0.05°C at 35.00°C - 38.00°C (ambient temperature 18.00°C - 28.00°C) in remaining measurement range: ± 0.1°C |
Measurement range | 32.00 - 42.99 °C |
Medical device | yes |
Memory spaces | 1 |
Product designation | Basal thermometer |
Product dimensions (L x W x H) | 142 x 23 x 13 mm |
Product weight | approx. 12,9 g (incl. batteries) |
Transfer of the measurement values via Bluetooth® | no |
Warranty (more information in the manual) | 5 |
Waterproof | yes |
EAN | 4211125791384 |
Article number | 79138 |
Product reviews
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29.04.2019 | Verified purchase
Product: OT 20
29.04.2019 | Verified purchase
Product: OT 20