---
product_id: 28181890
title: "RHM15 - Mini Hygro‑Thermometer Monitor – Pocket‑Sized Humidity & Temperature Meter (°F), Min/Max Memory, Built‑in Stand"
brand: "extech"
price: "64449CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Extech"
url: https://www.desertcart.sn/products/28181890-rhm15-mini-hygro-thermometer-monitor-pocket-sized-humidity-and-temperature
store_origin: SN
region: Senegal
---

# Ultra-compact pocket size 1% humidity & 1°F temp resolution Min/Max memory for extremes RHM15 - Mini Hygro‑Thermometer Monitor – Pocket‑Sized Humidity & Temperature Meter (°F), Min/Max Memory, Built‑in Stand

**Brand:** extech
**Price:** 64449CFA
**Availability:** ✅ In Stock

## Summary

> 🌡️ Stay ahead of the climate curve with precision you can carry anywhere!

## Quick Answers

- **What is this?** RHM15 - Mini Hygro‑Thermometer Monitor – Pocket‑Sized Humidity & Temperature Meter (°F), Min/Max Memory, Built‑in Stand by extech
- **How much does it cost?** 64449CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/28181890-rhm15-mini-hygro-thermometer-monitor-pocket-sized-humidity-and-temperature)

## 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

- • **Reliable & Certified:** CE certified with a 2-year warranty ensuring long-term peace of mind.
- • **Pocket-Sized Powerhouse:** Slim, lightweight design fits effortlessly in your pocket or workspace with a built-in stand.
- • **Ready to Use Out of the Box:** Includes LR44 battery and user manual for instant, hassle-free monitoring.
- • **Precision at Your Fingertips:** Dual-display shows humidity & temperature simultaneously with ±5% RH and ±2°F accuracy.
- • **Track Environmental Extremes:** Automatically records and recalls min/max readings to monitor fluctuations over time.

## Overview

The Extech RHM15 is a compact, pocket-sized hygro-thermometer that simultaneously measures relative humidity (10-99%) and temperature (14-140°F) with high resolution and accuracy. Featuring min/max memory for tracking environmental extremes, a built-in stand for desktop use, and powered by an included LR44 battery, it’s CE certified and backed by a 2-year warranty—perfect for professionals who demand reliable, on-the-go climate monitoring.

## Description

The RHM15 is a mini hygro-thermometer monitor which measures humidity and temperature and displays it simultaneously. The RHM15 has a built in memory which stores maximum and minimum readings. The RHM15 features a low battery indication and comes with a built in stand, user's manual and LR44 battery. Product is CE certified and has a year warranty.

Review: Helps tracking temperature and humidity - If you like to know what your guitar case humidity is, this is an ideal little device. I have one in each of the cases, and use in conjunction with the D'Addario Humidi-pak units.
Review: Hygrometer - Excellent Very accurate

## Features

- Compact Twin‑Readout Display - Simultaneously monitors relative humidity (10-99%) and air temperature (14-140 °F) on one mini-sized display.
- Memory for Extremes - Automatically stores and recalls both maximum and minimum readings—ideal for tracking environmental fluctuations over time.
- High‑Resolution Sensing - Features 1% humidity resolution and 1 °F temperature resolution, with ±5% accuracy at 25-75% RH and ±2 °F at 14-122 °F.
- Pocket‑Ready & Functional - Slim (2 × 1.5 × 0.63″) and lightweight (0.8 oz), equipped with a built-in stand for convenient desktop use.
- Battery Included with Long-Term Warranty - Comes powered by a single LR44 button cell (included) and is backed by a 2-year warranty for peace of mind.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00OZ8WKQA |
| Batteries | 1 CR2 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Battery Description | 1 x LR44/AG13 (1.5V) button cell battery |
| Best Sellers Rank | #151,454 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #73 in Lab Digital Thermometers |
| Brand | Extech |
| Certification | CE |
| Color | RHM15 |
| Customer Reviews | 4.1 4.1 out of 5 stars (53) |
| Date First Available | September 11, 2014 |
| Description Pile | 1 x LR44/AG13 (1.5V) button cell battery |
| Global Trade Identification Number | 00793950441503 |
| Included Components | Product & Instructions Guide |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1.6 ounces |
| Item model number | RHM15 |
| Manufacturer | Extech |
| Mounting Type | Tabletop |
| Operating Humidity | 10% to 99% relative humidity |
| Part Number | RHM15 |
| Power Source | Battery Powered |
| Product Dimensions | 2 x 1.5 x 0.63 inches |
| Special Features | High Accuracy |
| Style | RHM15 |
| Temperature Accuracy | +/-1.11°C |
| Temperature Reading Accuracy | plus_minus_1_point_1_degrees_celsius |
| Thickness | 1 Inches |
| UPC | 793950441503 |
| Upper Temperature Rating | 140 Degrees Fahrenheit |
| Voltage | 4.5 Volts |

## Product Details

- **Battery Description:** 1 x LR44/AG13 (1.5V) button cell battery
- **Brand:** Extech
- **Color:** RHM15
- **Item Weight:** 1.6 ounces
- **Mounting Type:** Tabletop

## Images

![RHM15 - Mini Hygro‑Thermometer Monitor – Pocket‑Sized Humidity & Temperature Meter (°F), Min/Max Memory, Built‑in Stand - Image 1](https://m.media-amazon.com/images/I/31Y3Qb53orL.jpg)
![RHM15 - Mini Hygro‑Thermometer Monitor – Pocket‑Sized Humidity & Temperature Meter (°F), Min/Max Memory, Built‑in Stand - Image 2](https://m.media-amazon.com/images/I/51ANoOp-CxL.jpg)
![RHM15 - Mini Hygro‑Thermometer Monitor – Pocket‑Sized Humidity & Temperature Meter (°F), Min/Max Memory, Built‑in Stand - Image 3](https://m.media-amazon.com/images/I/71r9NLgb5iL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Helps tracking temperature and humidity
*by H***D on February 21, 2025*

If you like to know what your guitar case humidity is, this is an ideal little device. I have one in each of the cases, and use in conjunction with the D'Addario Humidi-pak units.

### ⭐⭐⭐⭐⭐ Hygrometer
*by J***F on February 2, 2025*

Excellent Very accurate

### ⭐⭐⭐⭐ really tiny and uses a Mercury battery
*by E***A on June 24, 2022*

Some customers may look at a few thermometer and just buy a couple, without looking or reading too much. But note that this one is really small and it needs a Mercury battery to power it. So it is fine if you use it for 1 or 2 years, but what about after that? Will you spend money buying expensive Mercury batterie's again? My usual action is just to use the ones that can use a rechargeable AAA battery, so this small one will probably sit in the drawer. Just something to consider before you buy.

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-21*