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Most Accurate Salt Test | Precise Calibration

Hygrometer Calibration Kit (75% RH)

Sale price$8.99
4.7
Rated 4.7 out of 5 stars
46 Reviews

Measuring humidity in your humidor is dependent on the accuracy of your hygrometer. Calibrate a new digital hygrometer or humidity sensor before you use it, then re-calibrate it every six (6) months to get accurate readings to ensure the safety of your cigars. With Boveda, calibration is one-step easy. (Hygrometer not included.)
Hygrometer Calibration Kit (75% RH)
Hygrometer Calibration Kit (75% RH) Sale price$8.99

Specifications

Product Details
Inaccurate hygrometer readings put premium cigars at risk. Your cigars will smoke perfectly when you store them in a steady environment between 60 and 72% relative humidity (RH). So what’s the RH in your humidor?

Use this 75% RH Calibration Kit to:

  • Replace the messy, inaccurate bottle cap salt test
  • Get an accurate RH reading in just 24 hours
  • Calibrate a new humidity sensor, digital hygrometer, or analog hygrometer—even if it claims to be pre-calibrated, it will be inaccurate
  • Re-calibrate each hygrometer or sensor every six (6) months

HOW TO USE:

  1. Place your hygrometer/sensor inside the kit and completely reclose the zipper.
  2. Allow the kit to sit for a minimum of 24 hours at a room temperature between 65 and 75°F.
  3. Check the reading of the hygrometer/sensor:
    - If the reading is 75% RH, this calibration is complete.
    - If the reading is higher or lower than 75% RH: Note the difference as the margin of error for future readings. Or manually adjust your settings to 75% RH and repeat the above three (3) steps.
  • Reclose the bag with the Boveda packet inside to reuse the kit within three (3) months. 
  • Recalibrate your hygrometer every six (6) months to keep it performing effectively.
  • DO NOT mix different RH (Relative Humidity) levels within the same humidor.
  • DO NOT use Boveda in the same humidor with other humidification products because they'll counteract each other, and reduce the efficiency of the Boveda.

PACKAGING:

The B75 Boveda (75% RH) is not individually wrapped inside the resealable high-barrier heavy-duty plastic bag, which has a zip closure. 

LIFESPAN:

  • Opened: Three (3) months
  • Unopened Kit: Up to two (2) years

ACCURACY:

Boveda maintains inside relative humidity (RH) of +/-2% when using the recommended number of packets. Factors that adversely affect the expected results include a drafty humidor and/or extreme dry ambient conditions.

INGREDIENTS:

Food-grade salt, purified water, and a food-grade thickening agent. 

PRODUCT DIMENSIONS:

Please measure your hygrometer to make sure it will fit in the kit. Non-gusseted bag. 
5.5"/13.97 cm x 7"/17.78 cm

Our Customer Say

96%would recommend this product
4.7
Rated 4.7 out of 5 stars
Based on 46 reviews
Total 5 star reviews: 38 Total 4 star reviews: 6 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 1
Customers Talked About
Reviews Summary
Customers say this hygrometer calibration kit works exactly as advertised, providing accurate 75% humidity readings for testing their devices. Many reviews mention the simple process of placing hygrometers in the sealed bag for 24-48 hours. Users appreciate how easy it is to calibrate multiple hygrometers at once, helping them identify which devices were reading incorrectly. Common feedback includes satisfaction with the straightforward instructions and reliable results. While most find it perfect for standard-sized hygrometers, one customer noted the bag was too small for larger devices. Reviews consistently praise the product's effectiveness for maintaining accurate humidity measurements in humidors and storage cases.
46 reviews
  • AO
    Art O.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Easiest way to calibrate your hygrometer.

    I calibrated 4 of my hygrometers and I am pleased to announce that they were all at 75.

  • JR
    jonathan r.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    22 seconds ago
    Calibration kit

    Very easy to use. Threw a govee mini hygrometer in there for 72 hours. First two days the reading slowly kept increasing. On the third day it stopped moving and consistently stayed at 73 so I calibrated the govee on the app +2. Just ordered a second one for another hygrometer. No mess, no calculating salt, just simple and clean.

  • RJ
    Roosevelt J.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    As advertised

    Made seasoning extremely easy

  • GO
    Gregory O.
    Verified Reviewer
    Rated 3 out of 5 stars
    3 months ago
    Mixed Feelings

    I was pleased with the ability to calibrate my hygrometers at the 75% level. The kit was effective.

    However, the seal on the resealable bag separated from the surface of the calibration bag after opening and closing about 3 times. I ended up multi-folding and clipping the bag closed for calibration use. The lack of a working seal on the bag means it will not last 3 months for re-use.

    BO Profile picture for Boveda® Official Site
    Boveda® Official Site
    3 months ago

    Thank you for your review and feedback on our Hygrometer Calibration Kit. We're glad to hear that the kit was effective for calibrating your hygrometers at the 75% level. However, we're sorry to hear about the issue with the resealable bag seal separating after just a few uses. This is certainly not the quality we expect from our products. Please reach out to us at info@bovedainc.com so we can help resolve this issue with your calibration kit.

  • RM
    Rosemarie M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    4 months ago
    Website

    Website was very easy to navigate got my items quickly as well