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Item #:
41143727
Extech HW30 HeatWatch Humidity and Temperature Stopwatch
90% of respondents would recommend this to a friend
Item #:
41143727
BWP 1223
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The EXTECH Instruments HW30 HeatWatch is your ultimate companion for tracking humidity, temperature, and time with precision.
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What Stands Out
Radio-Controlled Time
Ensure accurate timekeeping with automatic synchronization to radio signals, eliminating the need for manual adjustments and providing a precise, hassle-free experience.
Temperature & Humidity
Monitor your environment effectively with built-in hygro-thermometer functionality, delivering real-time temperature and humidity readings for optimal comfort and health.
Calendar Display
Stay organized and informed with an integrated calendar feature, offering date details and making it easy to track important events and appointments directly from the clock.
Product Details
| Brand Name | Extech Instruments |
| UPC | 885520990709 885432331096 793950365304 745332081425 |
| Global Trade Identification Number | 00793950365304 |
| Unit Count | 1 Count |
| Item Highlight | Heat index 70-122F with alarm, temp 14-122F, humidity 1-99%, stopwatch/timer, 99-lap memory, CR2032, lanyard |
| Manufacturer | Extech |
| Number of Items | 1 |
| Item Type Name | Stopwatch |
| Model Number | HW30 |
| Manufacturer Part Number | HW30 |
| Color | Yellow/Black |
| Material Type | Plastic |
| Number of settings | 5 |
| Item Dimensions D x W x H | 0.8"D x 2.6"W x 0.8"H (2 x 6.6 x 2 cm) |
| Item Weight | 0.02 kg |
| Screen Size | 5.08 |
| Brand | Extech Instruments |
| Material | Plastic |
| Product Dimensions (L x W x H) | 0.8"D x 2.6"W x 0.8"H (2 x 6.6 x 2 cm) |
Who Should Buy?
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Homeowners
Ideal for homeowners wanting accurate time, humidity, and temperature readings for comfort and lifestyle management.
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Office Use
Perfect for office settings where monitoring indoor climate and time is essential for productivity and comfort.
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Weather Enthusiasts
Great for individuals who enjoy tracking weather conditions and appreciate precise environmental data in their space.
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Budget Buyers
Not suitable for those seeking low-cost options as this product may be pricier compared to standard clocks.
Product Description
Extech HW30 HeatWatch Humidity and Temperature Stopwatch
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What features does the EXTECH Instruments HW30 offer?
Answer: The EXTECH Instruments HW30 HeatWatch is equipped with advanced features such as simultaneous temperature and humidity measurement, a stopwatch function, and a large LCD display for easy reading. The device excels in providing accurate readings for environmental conditions and is useful for various applications, including agriculture, HVAC, and indoor air quality assessment. Users can rely on the HW30 for precise monitoring of conditions in greenhouses, basements, or even during home inspections. -
Question:
How accurate is the temperature and humidity measurement on the HW30?
Answer: The EXTECH Instruments HW30 is known for its high accuracy, offering temperature readings within ±1.5°F and humidity measurements within ±3%. This level of precision is essential in professional settings where environmental conditions must be monitored closely. For instance, scientists conducting experiments in controlled environments or builders testing moisture levels in materials will find the HW30's accuracy to be crucial for reliable data. -
Question:
Can I use the HW30 for outdoor measurements?
Answer: While the HW30 is primarily designed for indoor use, it can also be used for outdoor measurements as long as it is sheltered from direct sunlight and extreme weather conditions. Utilizing it in shaded or controlled environments allows for accurate readings. This versatility is beneficial for outdoor enthusiasts monitoring temperature and humidity during activities like camping or hiking, ensuring they are prepared for changing weather conditions. -
Question:
What is the battery life of the HW30?
Answer: The HW30 operates on a standard 9V battery, which provides a long battery life under normal usage. Users can expect extended periods of operation without frequent replacements, making it convenient for fieldwork or continuous monitoring. This feature is particularly advantageous for professionals in industries such as agriculture or construction, where prolonged measurements are necessary without interruptions. -
Question:
Is the HW30 portable for travel?
Answer: Yes, the EXTECH Instruments HW30 is designed with portability in mind. Its compact size and lightweight build allow users to easily carry it in bags or tool kits. This portability makes it an excellent choice for professionals who need to measure environmental conditions on the go, such as HVAC technicians conducting site visits or researchers collecting field data. -
Question:
How does the stopwatch function work on the HW30?
Answer: The stopwatch function on the EXTECH HW30 allows for precise time tracking alongside temperature and humidity readings. Users can start, stop, and reset the timer, which is useful for experiments or processes requiring specific timing. This multifunctionality can benefit professionals monitoring procedures in laboratory settings or during quality control processes in manufacturing. -
Question:
What kind of display does the HW30 have?
Answer: The HW30 features a large, easy-to-read LCD display that presents measurements clearly and prominently. This user-friendly display allows for quick referencing of both temperature and humidity levels, making it accessible for users of all skill levels. Professionals such as educators or trainers can utilize the HW30 in demonstrations, ensuring that students can easily read and understand data. -
Question:
Can I reset the humidity and temperature readings on the HW30?
Answer: Yes, the EXTECH HW30 allows users to reset the recorded humidity and temperature data. This feature is particularly useful for tracking changes over time, enabling users to monitor environmental fluctuations in various settings. For example, users can monitor indoor air quality throughout the day or compare conditions across different rooms in a building. -
Question:
What is the measurement range for temperature and humidity on the HW30?
Answer: The EXTECH HW30 has a temperature measurement range from -4°F to 140°F and can measure humidity levels from 0% to 100%. This wide range makes the device suitable for multiple applications, such as monitoring climates in residential settings or conducting scientific research. For instance, it can help gardeners assess the ideal conditions for plant growth or assist in HVAC system diagnostics. -
Question:
Where can I buy EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch in Botswana?
Answer: You can purchase the EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch on Ubuy, which is a reliable online platform that offers a diverse range of products, including measuring instruments. Ubuy provides a convenient shopping experience, ensuring you can easily find and acquire this professional-grade device for your needs.
Extech Instruments Thermometers & Weather Instruments HW30 Editorial Review
The Extech 365510 StopwatchClock is a versatile product that can be used for timing, temperature, humidity and heat index measurement. The temperature readings update within seconds, while humidity takes a few seconds longer to stabilise. The stopwatch can also display decimal minutes or minutes and seconds. The watch has a digital time display and a loud alarm. The product is easy to use, has an easy-to-read display and is quick to reset. It comes with a certificate of compliance, and a traceable NIST calibration certificate can be requested at an additional cost.
Customer Reviews & Ratings
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Pros
- Versatile product for timing, temperature, humidity and heat index measurement
- Easy to use and quick to reset
- Comes with a certificate of compliance
- Loud alarm
- Easy-to-read display
- Temperature readings update within seconds
Cons
- May not accurately measure high temperatures over 120 degrees Fahrenheit
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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Features & Benefits
- Displays temperature, humidity, and heat index for comprehensive monitoring.
- Features an up/down stopwatch function with 1/100 second resolution.
- Includes a 99 lap counter for tracking performance.
- Recalls fastest, slowest, and average lap times for detailed analysis.
- Offers both 12 or 24 hour clock function for convenience.
- Calendar mode shows day, month, and date effortlessly.
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