---
product_id: 767705556
title: "Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar"
brand: "extech"
price: "€ 3.59"
currency: EUR
in_stock: false
url: https://www.desertcart.com.cy/products/767705556-extech-hw30-combination-humidity-heat-index-and-temperature-meter-stopwatch
store_origin: CY
region: Cyprus
---

# Humidity 1-99%RH with ±3°F accuracy 1/100 sec stopwatch & 10-hr timer Heat index range 22~50℃ Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar

**Brand:** extech
**Price:** € 3.59
**Availability:** ❌ Out of Stock

## Summary

> 🌟 Master your environment, time, and performance with one sleek device!

## Quick Answers

- **What is this?** Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar by extech
- **How much does it cost?** € 3.59 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/767705556-extech-hw30-combination-humidity-heat-index-and-temperature-meter-stopwatch)

## 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

- • **Versatile Timekeeping:** Dual 12/24-hour clock modes plus calendar for seamless scheduling
- • **Precision Timing Mastery:** 1/100 second stopwatch with 99 lap memory for flawless performance tracking
- • **Lightweight & Ready to Go:** Compact 85g design with durable build and lanyard for on-the-move use
- • **Stay Ahead of Heat Stress:** Programmable heat index alarm keeps you safe in extreme conditions
- • **All-in-One Environmental Monitor:** Simultaneously measures temperature, humidity, and calculates heat index

## Overview

The Extech HW30 is a compact, handheld meter combining precise humidity, temperature, and heat index monitoring with advanced stopwatch and timer functions. Featuring a programmable heat index alarm, 99-lap memory, dual clock modes, and a durable lightweight design, it’s engineered for professionals who demand accuracy and versatility in outdoor, industrial, or lab settings.

## Description

This HW30 multi-function stopwatch displays digital up/down timer, temperature, humidity and heat index. Temperature index measurement indicates the heat when combined with the humidity and actual temperature. Ideal for hot weather use. Other features include a 12/24-hour clock, stopwatch, 30-lap/split memory, and programmable alarm. HW30 humidity/temperature heat watch comes with strap, battery and instructions

## Features

- HEAT INDEX CALCULATOR & ALARM - Monitors heat index (22~50℃) and triggers programmable audible alarm to prevent heat stress in outdoor and humid conditions
- MULTI-MODE STOPWATCH & TIMER - Features a stopwatch/chronograph (1/100 second), 10-hour countdown timer with alerts, up/down timer, calendar, and dual 12/24-hour clock modes
- Lap / Split Memory with Recall - Stores up to 99 Lap or 30 Lap / Split Records Fast, Fastest, Fastest, Slow, Average Lap Recall. For training, industrial timing, and lab use
- Temperature and Humidity Display - Displays ambient temperature (-10-10-50℃) with ±3°F accuracy and humidity (1-99%RH) and automatically calculates the heat index
- COMPACT AND READY TO USE DESIGN - Lightweight (about 85g) handheld foam. Powered by one 3V CR2032 battery Durable construction with lanyard. Large digital display

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Extech Instruments |
| Model Number | HW30 |
| Package Dimensions | 18.1 x 11.4 x 3.1 cm |
| Material | Glass |
| Volume | 0.02 Milliliters |
| Battery Type | Alkaline |
| Lithium Battery Packaging | Batteries packed with equipment |
| Package Weight | 0.11 Kilograms |
| Batteries Required | Yes |
| Batteries Included | Yes |
| Brand Name | EXTECH |
| Item Weight | 0.02 Kilograms |

## Product Details

- **Brand:** EXTECH
- **Material:** Glass
- **Product Dimensions:** 2D x 6.6W x 2H cm
- **Item Weight:** 0.02 Kilograms
- **Number of settings:** 5

## Images

![Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar - Image 1](https://m.media-amazon.com/images/I/61Fdg-VY5bL.jpg)
![Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar - Image 2](https://m.media-amazon.com/images/I/71tyxt5ILBL.jpg)
![Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar - Image 3](https://m.media-amazon.com/images/I/616CN7TVVqL.jpg)

## Questions & Answers

**Q: Does this watch make any noise or sound when you press the buttons?**
A: No, no noise at all

**Q: Does this come with a certificate?**
A: Thank you so much for your interest in our products. The 365510 is able to receive a Certificate of Compliance by us after the purchase. Also, if you pay the additional difference, it can receive a traceable NIST calibration certificate. Be sure to check the part number for it 365510-NIST

**Q: how quickly do the temperature and humidity readings get updated?  in a minute, or in ten? and its real size?**
A: The temperature updates within seconds while the humidity may take a few seconds more to stabilize and prodcue the display.

**Q: how tall are the numbers?**
A: Mine, which is a model 365510 has numbers just a shade under 3/8", probably closer to 5/16". I find them adequate for the job at hand.

## Frequently Bought Together

- EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch
- GEARWRENCH 20 Piece Ratcheting Combination Wrench | SAE & Metric | 35720A-02
- Extech 480400 Phase Tester

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-02-18*