---
product_id: 10591866
title: "RH300-CAL Humidity Calibration Kit"
brand: "extech"
price: "59511 Ft"
currency: HUF
in_stock: true
reviews_count: 9
url: https://www.desertcart.hu/products/10591866-rh300-cal-humidity-calibration-kit
store_origin: HU
region: Hungary
---

# 7.5 x 3.5 x 2.4 in 0.02 kg weight 33%-75% RH range RH300-CAL Humidity Calibration Kit

**Brand:** extech
**Price:** 59511 Ft
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Calibration Game!

## Quick Answers

- **What is this?** RH300-CAL Humidity Calibration Kit by extech
- **How much does it cost?** 59511 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/10591866-rh300-cal-humidity-calibration-kit)

## Best For

- extech enthusiasts

## Why This Product

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

## Key Features

- • **User-Friendly:** Small opening for a snug fit of the sensor probe, making calibration a breeze.
- • **Compact Design:** Designed for easy tabletop use, fitting seamlessly into your workspace.
- • **Durable Quality:** Manufactured by Extech, a trusted name in measurement tools.
- • **Warranty Assurance:** Enjoy peace of mind with a 6-month warranty on parts and labor.
- • **Precision Calibration:** Ensure your humidity meters are always spot-on with our calibration kit.

## Overview

The Extech RH300-CAL Humidity Calibration Kit is an essential tool for professionals needing precise humidity measurements. It includes calibration bottles for 33% and 75% relative humidity, designed for easy use with Extech humidity meters. Compact and lightweight, this kit ensures your instruments are always calibrated to perfection.

## Description

ExtechRH300-CAL Humidity Calibration Kit

## Features

- Optional calibration kit for calibrating extech humidity meters
- 33% and 75% relative humidity bottles
- Bottle designed with small opening for snug fit of the sensor probe

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Extech |
| Item Weight | 0.02 Kilograms |
| Mounting Type | Tabletop |
| Operating Humidity | 33% to 75% relative humidity |
| Manufacturer | Extech Instruments |
| UPC | 796841972032 793950433003 |
| Global Trade Identification Number | 00793950433003 |
| Part Number | EXTRH300-CAL |
| Item Weight | 0.704 ounces |
| Product Dimensions | 7.5 x 3.5 x 2.4 inches |
| Country of Origin | China |
| Item model number | RH300-CAL |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Included Components | Humidity Calibration Bottles |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Warranty Description | 6 Months Parts and Labor |

## Images

![RH300-CAL Humidity Calibration Kit - Image 1](https://m.media-amazon.com/images/I/81u-bRK4WrL.jpg)

## Questions & Answers

**Q: Can you use on the 445815**
A: This is the recommended calibration kit for 445815.

**Q: I need the instructions,  can anyone supply these? I recently bought this through amazon. Can anyone help??**
A: The instructions (from Extech) come with their meters, not the calibration jars. I use these standards with my Extech 445580, and combined, the meter and the calibration jars are effective. The instructions with the 445580 stress that the meter be given lots of time to equalize (40 minutes per jar!). I found it doesn't need quite that long, but definitely requires around 15-20 minutes in order to stabilize and give an accurate reading. Be patient.

**Q: Will the hole in the top accommodate a probe that is 3/4" in diameter?**
A: Hello Mika,The opening on the RH300-Cal salt bottles are 0.5". A 0.75" probe will be too large.Best Regards

**Q: does it comes with nist certificate?**
A: Hello, Thanks for your question, No, the Kit does not come with a NIST certificate. If you have any questions, please feel free to contact our tech support line at 866-477-3687 option 3

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    These work well with the Extech 445580
  

*by M***T on Reviewed in the United States on February 18, 2019*

They've been durable too. Have been using them for a few months now, and the components haven't deteriorated any.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Good product
  

*by A***I on Reviewed in the United States on February 4, 2021*

Good product

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Four Stars
  

*by D***R on Reviewed in the United States on June 4, 2017*

Good delivery time and the kit performs to expectations. Again, happy with this purchase.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hu/products/10591866-rh300-cal-humidity-calibration-kit](https://www.desertcart.hu/products/10591866-rh300-cal-humidity-calibration-kit)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-05*