---
product_id: 277197602
title: "EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch"
brand: "extech"
price: "€ 0.77"
currency: EUR
in_stock: false
url: https://www.desertcart.nl/products/277197602-extech-instruments-hw30-heatwatch-humidity-and-temperature-stopwatch
store_origin: NL
region: Netherlands
---

# Full calendar display 1/100 sec stopwatch precision Temp & humidity readout EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch

**Brand:** extech
**Price:** € 0.77
**Availability:** ❌ Out of Stock

## Summary

> ⏱️ Stay ahead of time and climate — because every second and degree counts!

## Quick Answers

- **What is this?** EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch by extech
- **How much does it cost?** € 0.77 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/277197602-extech-instruments-hw30-heatwatch-humidity-and-temperature-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

- • **All-in-One Timekeeper:** Switch effortlessly between 12/24 hour clock modes and calendar views for seamless scheduling.
- • **Data at Your Fingertips:** Fast lap recall and multi-function display keep critical info accessible for professionals on the move.
- • **Precision Timing Mastery:** Track every split with 1/100 second stopwatch accuracy and 99 lap memory for your fastest, slowest, and average times.
- • **Climate Insight On-the-Go:** Instantly monitor temperature, humidity, and heat index to stay ahead in any environment.
- • **Compact & Lightweight Design:** Weighing just 20g with a sleek green casing, it’s built for portability without sacrificing durability.

## Overview

The Extech HW30 HeatWatch combines precise 1/100 second stopwatch functionality with real-time temperature, humidity, and heat index monitoring. Featuring a 99 lap counter with fastest/slowest/average lap recall, dual 12/24 hour clock modes, and a calendar display, this compact 20g device is engineered for professionals who demand accuracy and environmental awareness in one sleek tool.

## Description

Full description not available

## Features

- Displays temperature, humidity and heat index
- Up/Down stopwatch function with 1/100 second resolution
- Stopwatch has 99 lap counter with Fastest/Slowest/Average lap recall
- 12 or 24 hour clock function
- Calendar mode displays day, month and date

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Extech |
| Model Number | HW30 |
| Color | Green |
| Product Dimensions | 7.87 x 6.6 x 2.03 cm; 20 g |
| Material | Plastic |
| Item Weight | 20 g |

## Product Details

- **Colour:** Green
- **Brand:** Extech
- **Material:** Plastic
- **Product dimensions:** 6.6D x 7.9W x 2H centimeters
- **Item weight:** 0.02 Kilograms

## Images

![EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch - Image 1](https://m.media-amazon.com/images/I/61Fdg-VY5bL.jpg)
![EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch - Image 2](https://m.media-amazon.com/images/I/71tyxt5ILBL.jpg)
![EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch - Image 3](https://m.media-amazon.com/images/I/616CN7TVVqL.jpg)

## Available Options

This product comes in different **Style** options.

## 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 Netherlands*
*Store origin: NL*
*Last updated: 2026-01-26*