Does this come with a certificate?

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

how quickly do the temperature and humidity readings get updated? in a minute, or in ten? and its real size?

The temperature updates within seconds while the humidity may take a few seconds more to stabilize and prodcue the display.

how tall are the numbers?

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.

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

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

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.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Best international shipping I've ever tried. Worth every penny!

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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

Extech HW30 Combination Humidity, Heat Index, and Temperature Meter; Stopwatch, Time Clock, and Calendar

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