Beurer OT 20 Basal Temperature Ovulation Monitor

The Beurer OT 20 Basal Temperature Ovulation Monitor is a basal body temperature (BBT) thermometer designed for natural cycle tracking and family planning. By measuring your basal body temperature to two decimal places each morning, it helps you record the small, sustained temperature shift that can be consistent with ovulation, so you can build a clearer picture of your cycle and fertile window over time.

It's worth understanding what a basal thermometer does and doesn't do. Basal body temperature is retrospective: a sustained rise in temperature may indicate that ovulation has already occurred, rather than predicting the exact day in advance. Used consistently across a cycle, it becomes a useful part of a natural family planning routine, but it isn't a pregnancy test and can't confirm ovulation on its own. Paired with the free Ovy cycle-tracking app, your daily readings can be logged and viewed as a pattern, making it easier to see how your temperature moves through the month.

How it works

• Basal body temperature measurement: The OT 20 uses contact-measurement technology to read temperature to two decimal places, giving the fine resolution needed to notice the subtle shifts that matter when charting a cycle.
• Measurement accuracy: Accurate to \u00b10.05\u00b0C between 35.00\u00b0C and 38.00\u00b0C (at an ambient temperature of 18.00\u00b0C to 28.00\u00b0C), and \u00b10.1\u00b0C across the remaining measurement range.
• Ovy app pairing: Readings are entered into the Ovy app so you can track your cycle, ovulation and fertile days in one place over time.
• Manual recording: The OT 20 is not Bluetooth enabled, so you enter each temperature into the app yourself rather than it syncing automatically.

How to use

1. For the most accurate reading, hold the thermometer in place (in the mouth) for around 2 minutes before switching it on.
2. Take your temperature at the same time each morning before getting up, as basal readings are most consistent at rest.
3. Wait for the acoustic signal that tells you the measurement is complete, then read the display.
4. Log the reading manually into the Ovy app to build up your cycle chart.

Everyday practicality

The flexible measuring tip suits both oral and vaginal measurement, so you can choose the method that works for you. The OT 20 is waterproof and can be disinfected, and it comes with a protective cap for hygienic storage between uses. An automatic switch-off helps preserve battery life, and a single memory space stores your most recent reading. It's backed by a 5-year limited warranty.

Best for

The Beurer OT 20 is a great option if you:

• Want to track basal body temperature as part of natural cycle awareness and family planning
• Prefer a thermometer that reads to two decimal places for finer detail
• Like keeping a digital record of your cycle through the Ovy app
• Want the choice of oral or vaginal measurement with a flexible tip

It may not suit you if you're looking for a device that syncs readings automatically, since the OT 20 requires manual entry into the app.

Disclaimer

The OT 20 is a basal body temperature thermometer for cycle tracking and does not confirm ovulation, predict or confirm pregnancy, or work as a form of contraception. Basal temperature is one input into natural family planning and should be used alongside guidance from your healthcare professional. For interpretation of your cycle or any fertility concerns, speak to your maternity service or clinician.