Mercury Basal Thermometer (°F)
DP20 - Mercury Basal Thermometer (°F)

    Note : Basal thermometers are different from regular fever thermometers and used only by WOMEN to note basal body temperature that occurs with ovulation.

    NET Basal Mercury Thermometer is an accurate device to chart basal body temperature of women to predict their fertile period or ovulation (three days). Basal thermometer, thus, helps women determine when they ovulate and thereby dramatically increase chances of conceiving and falling pregnant. By this way they can plan either to conceive or take precaution.

  • A woman is susceptible to conceive during 3 days of ovulation and NET Basal Mercury Thermometer can indicate these days.
  • With ovulation body temperature increases due to increase in hormone progesterone and by precise recording of your body's resting temperature first thing in the morning and at the same time each morning, you can know when ovulation takes place in your cycle.
  • Made from high quality capillary tubing with lens front in Jena normal glass.
  • Suitable for oral (sub-lingual) and rectal use.

Temperature Range:

  • 95° - 100°F Subdivided in 0.1°F

Includes comprehensive ovulation charts and instructions!

Price includes delivery charges.
Delivery time by Airmail » 2-3 weeks.

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How to Use a Basal Thermometer?

A basal thermometer is used by women to determine their most fertile period of the menstrual cycle by noting the change in basal body temperature that occurs with ovulation.

The basal thermometers are very sensitive as they detect the very small changes in body temperature associated with the menstrual cycle. Therefore, the temperature should be taken with either a mercury or digital thermometer which displays increments of 0.05° C (0.1° F).

Before going to sleep, keep a basal thermometer handy near bed as it is required to take basal body temperature first thing in the morning after at least 8 hours of sleep and before any physical activity including getting out of bed, moving around in bed, talking, eating or drinking. Any activity after waking, no matter how slight, will affect the basal body temperature.

The body temperature is lower (96.0 to 97.5 F) during the first two weeks of a woman's cycle. With ovulation, the body temperature rises because of increase in progesterone hormone.

Steps To Remember:

  • Use a mercury or digital thermometer specifically designed for taking basal body temperature readings. Do not use a standard thermometer.

  • Get adequate sleep. Minimum of 7 to 8 hours of sleep is adviced. Remember, irregular sleep patterns (including less than 3 hours of uninterrupted sleep) can result in inaccurate readings.

  • It is important to take your basal body temperature every day at the same time, before getting out of bed. To ensure this set an alarm and keep the thermometer at your bedside or under your pillow. Do not move, eat or drink until after you've taken your BBT (which is supposed to be taken at full rest). Even shaking a mercury basal thermometer should be done on previous night.

  • Make a graph to record your readings and use this as a guide to keep your own chart of the changes in basal temperature. There is usually a basal body temperature chart included in the pack of the basal thermometer.

  • A woman is considered to be most fertile during the 6 days prior to the earliest recorded date of ovulation from that 6 month period until the 5th day after the rise in temperature in the current cycle.


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    Mercury Basal Thermometer (°F)


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