---
product_id: 309861
title: "Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH Humidity Control Pack | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-count"
brand: "boveda"
price: "£9.87"
currency: GBP
in_stock: true
reviews_count: 13
category: "Boveda"
url: https://www.desertcart.co.uk/products/309861-boveda-for-cigars-one-step-calibration-kit-preloaded-with-75
store_origin: GB
region: United Kingdom
---

# 24-hour quick accuracy check Precise 75% RH calibration Reusable up to 3 months after opening Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH Humidity Control Pack | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-count

**Brand:** boveda
**Price:** £9.87
**Availability:** ✅ In Stock

## Summary

> 📏 Calibrate like a pro—because your cigars deserve precision.

## Quick Answers

- **What is this?** Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH Humidity Control Pack | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-count by boveda
- **How much does it cost?** £9.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/309861-boveda-for-cigars-one-step-calibration-kit-preloaded-with-75)

## Best For

- boveda enthusiasts

## Why This Product

- Trusted boveda brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Sensor Friendly:** Calibrate multiple digital or analog hygrometers simultaneously with one kit.
- • **Effortless Calibration:** Mess-free, zip-seal bag design makes professional-level hygrometer calibration a breeze.
- • **Precision You Can Trust:** Patented saltwater-based pack delivers exact 75% relative humidity for flawless calibration.
- • **Long-Lasting Reliability:** Reusable for up to 3 months after opening, ensuring your sensors stay accurate over time.
- • **Fast Results, No Guesswork:** Get accurate RH readings in just 24 hours—never leave your premium cigars to chance.

## Overview

The Boveda One-Step Calibration Kit offers a patented, saltwater-based humidity pack that creates a stable 75% RH environment inside an airtight bag, enabling precise calibration of digital and analog hygrometers within 24 hours. Designed for mess-free, reusable use over three months, it ensures your humidity sensors deliver accurate readings critical for preserving premium cigars and other humidity-sensitive items.

## Description

Even if your hygrometer says it doesn’t need to be calibrated, it does—every 6 months. Find out if your hygrometer is giving accurate readings with the Boveda One-Step Calibration Kit, an easy-to-use, professional-level salt test. An uncalibrated hygrometer is like using no hygrometer. You’ll never get an accurate relative humidity (RH) reading from a hygrometer or humidity sensor until it’s precisely calibrated. A well-calibrated hygrometer gauges if your premium cigars are stored at proper RH. Chemists and lab professionals determine the accuracy of a hygrometer with a “salt” test. Unlike the bottle cap salt test, the Boveda One-Step Calibration Kit is precise, mess-free and ready-to-use. Just slip a hygrometer in the airtight, high-density bag preloaded with Boveda. The patented saltwater-based pack uses natural salts and pure water to achieve 75% RH inside the bag. After 24 hours, check the hygrometer’s reading. If it doesn’t read 75% RH, your hygrometer is off. Simply adjust it, zip it back in the bag with the Boveda and verify the reading the next day. For added accuracy, perform a 2-point calibration with the 32% RH Boveda One-Step Calibration Kit (sold separately) to check the high and low RH readings of your hygrometer. Note: Do not mix different Boveda RH levels within the same humidor. And do not use Boveda in the same humidor with other humidification products because they will fight against each other and reduce the efficiency of Boveda.

Review: I can trust it for my cigar humidors and “tupper-does” - Tested across my three hydrometers I use and after a week of them being in a sealed bag and container they didn’t vary more than 0,2% rh , so I think this process works reliably. Don’t know if the packet was exactly the rh indicated but I think it’s close enough for my needs. This is better than other methods I’ve tried.
Review: The Best Possible Way to Calibrate a Hygrometer. - Prior to becoming aware of Boveda products, I attempted to calibrate my three digital hygrometers (one Diamond Crown and two Xikars) using the 24 hour "salt test." I repeated this test on four different occasions and each hygrometer had a different reading after each one. I used the same sized ziplock bag and tried to create the same salt>water ratio each time but got different results despite this. This experience indicates to me that when performing the salt test at home with a ziplock bag, the humidity inside the bag varies depending on the ratio of salt to water in your particular mixture, which creates a different reading for each test and thus, no usable baseline for calibration. This is just a hypothesis based on my experience. After my lack of success with the salt test method I ran across the Boveda One-Step Hygrometer Calibration Kit and promptly ordered it. With this item there is no guesswork or struggle involved. Boveda has already done the work for you in creating a packet, which emits EXACTLY 75.5% humidity. All you have to do is stick your hygrometers in the bag, wait 24 hours and you have a precise result, which tells you definitively how accurate your hygrometer is. I didn't feel comfortable leaving my precious (and expensive) cigars inside my new humidor without knowing the humidity level inside. This is a great product and is infinitely preferable to the salt test; highly recommended. Thanks Boveda.

## Features

- INACCURATE HYGROMETER READINGS PUT PREMIUM CIGARS AT RISK. Precisely calibrate digital and analog hygrometer and humidity sensors, so they give accurate relative humidity (RH) readings of what’s going on inside a humidor
- PATENTED SALTWATER-BASED BOVEDA is the ultimate salt test! Do-it-yourself calibration methods, like bottle cap salt tests are imprecise and inaccurate
- EASY, MESS-FREE CALIBRATION—Simply place a hygrometer or humidity sensor in the airtight high-density bag with the enclosed Boveda humidity pack. Zip closed and check back in a day
- GET PRECISE RH READING IN 24 HOURS—If a hygrometer doesn’t read 75% RH, adjust by the number of points it’s off, then re-test. For added accuracy, do a 2-point calibration with a 32% RH Boveda One-Step Calibration Kit (sold separately)
- REUSABLE FOR MULTIPLE HYGROMETERS/SENSORS—Good for 3 months after opening (2 years if unopened in original packaging). Re-calibrate a hygrometer or humidity sensor every 6 months to keep it performing effectively

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000A3UBLA |
| Best Sellers Rank | #15,969 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #10 in Weather Hygrometers |
| Brand | Boveda |
| Brand Name | Boveda |
| Customer Reviews | 4.7 out of 5 stars 3,160 Reviews |
| EU Spare Part Availability Duration | 2 Years |
| Global Trade Identification Number | 00850661003311 |
| Item Weight | 13.61 g |
| Manufacturer | Boveda |
| Material | Plastic |
| Model Number | CAL75-SM |
| Part Number | CAL75-SM |
| Runtime | 24 hours |
| Smart Home Compatibility | Not Smart Home Compatible |
| UPC | 850661003311 |
| Unit Count | 1.00 Count |

## Product Details

- **Brand:** Boveda
- **EU Spare Part Availability Duration:** 2 Years
- **Item Weight:** 13.61 g
- **Material:** Plastic
- **UPC:** 850661003311

## Images

![Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH Humidity Control Pack | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-count - Image 1](https://m.media-amazon.com/images/I/61bJ1fEGCaL.jpg)
![Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH Humidity Control Pack | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-count - Image 2](https://m.media-amazon.com/images/I/61myzOQAniL.jpg)
![Boveda for Cigars | One-Step Calibration Kit | Preloaded with 75% RH Humidity Control Pack | Precise Salt Test for Digital and Analog Hygrometers and Humidity Sensors | 1-count - Image 3](https://m.media-amazon.com/images/I/61V9BHg-+zL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ I can trust it for my cigar humidors and “tupper-does”
*by 5***E on April 19, 2026*

Tested across my three hydrometers I use and after a week of them being in a sealed bag and container they didn’t vary more than 0,2% rh , so I think this process works reliably. Don’t know if the packet was exactly the rh indicated but I think it’s close enough for my needs. This is better than other methods I’ve tried.

### ⭐⭐⭐⭐⭐ The Best Possible Way to Calibrate a Hygrometer.
*by B***D on March 25, 2014*

Prior to becoming aware of Boveda products, I attempted to calibrate my three digital hygrometers (one Diamond Crown and two Xikars) using the 24 hour "salt test." I repeated this test on four different occasions and each hygrometer had a different reading after each one. I used the same sized ziplock bag and tried to create the same salt>water ratio each time but got different results despite this. This experience indicates to me that when performing the salt test at home with a ziplock bag, the humidity inside the bag varies depending on the ratio of salt to water in your particular mixture, which creates a different reading for each test and thus, no usable baseline for calibration. This is just a hypothesis based on my experience. After my lack of success with the salt test method I ran across the Boveda One-Step Hygrometer Calibration Kit and promptly ordered it. With this item there is no guesswork or struggle involved. Boveda has already done the work for you in creating a packet, which emits EXACTLY 75.5% humidity. All you have to do is stick your hygrometers in the bag, wait 24 hours and you have a precise result, which tells you definitively how accurate your hygrometer is. I didn't feel comfortable leaving my precious (and expensive) cigars inside my new humidor without knowing the humidity level inside. This is a great product and is infinitely preferable to the salt test; highly recommended. Thanks Boveda.

### ⭐⭐⭐⭐⭐ Work beautifully and cheap as dirt!
*by D***X on September 9, 2012*

I have been looking for a way to calibrate my various humidity meters and controls without spending $50 on the little calibration bottles that I always see. I finally ran across these and they work perfectly! The bag contains a packet that diffuses moisture to a specific level (75.5%) so you just put your device in there, wait 24-36 hours and check your reading. The one thing to note is that the included bag is quite small, about 5.5" square, and really doesn't fit anything bu the smallest devices. I decided to use a 1 quart Ziplok freezer bag instead which is just a bit larger and will hold any of my devices- Control3 humidity controllers, Wind and Weather stand-alone and remote sensors, etc. The bag is still small enough that the packet won't take forever to diffuse moisture into it. I had steady readings of 75-76% (which makes sense for a 75.5% packet) after 24 hours. All in all for the price this product is miraculous. The packet even claims to last 3 months once it's open. Heck, for the money I'm happy it lasts a week!

## Frequently Bought Together

- Boveda One Step Hygrometer Mess Free Calibration Kit – Preloaded 75% RH 2-Way Humidity Control – Hygrometer Accuracy – Precise Test for Digital and Analog Hygrometers and Humidity Sensors – 1 Count
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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*