What is the humidity range it can measure?

Hello, Thanks for your question, The humidity range is 10 to 90%RH, the Max resolution is: 0.1%RH and the basic acuracy±3%RH. if you have any questions, feel free to contact our technical support line at 866-477-3687 option 3

Can i use this for test the % of humidity in food, like mixed corn?

No. You can't use this meter for measure humidity in food. This meter is for ambient temperature, ambient humidity, dew point and other variables. Also, you can use an optional wire probe for measure temperature in food, but not humidity.

Extech RH300 Digital Psychrometer, Humidity (RH), Air Temperature, Dew Point & Wet Bulb Meter

Extech RH300 Digital Psychrometer, Humidity (RH), Air Temperature, Dew Point & Wet Bulb Meter

Product ID: 48460269

Secure Transaction

Details

Colour
Orange
Brand
Extech
Item weight
0.02 Kilograms
Battery description
2 x AAA (1.5V)
Mounting type
Tabletop

📊T1-T2 differential calculation

🔒Protective twist sensor cap

🌡️Simultaneous multi-parameter display

Description

🌟 Stay ahead of the climate curve with Extech RH300 – precision you can trust, wherever you go!

RUGGED READY - Unique sensor cap twists closed to shield your device during transport and storage.
DIFFERENTIAL MASTERY - Calculate temperature differentials with optional probe for advanced environmental analysis.
TRIPLE READ PRECISION - View humidity, air temp, and dew point or wet bulb all at once for instant insights.
SMART POWER MANAGEMENT - Auto power off and data hold features maximize battery life and usability in the field.
FIELD READY COMPACTNESS - Lightweight and portable design fits perfectly in your toolkit for on-the-go professionals.

The Extech RH300 Digital Psychrometer is a compact, professional-grade meter designed for field use, simultaneously measuring relative humidity, air temperature, dew point, and wet bulb temperature. It features advanced calculations like T1-T2 differential with an optional probe, a protective twist sensor cap, and smart power-saving functions, making it an essential tool for precise environmental monitoring.

Specifications

ASIN	B000BF5400
Battery Description	2 x AAA (1.5V) batteries
Battery description	2 x AAA (1.5V) batteries
Best Sellers Rank	796,665 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,491 in Multi Testers
Brand	Extech
Colour	Orange
Country Of Origin	China
Customer Reviews	4.3 out of 5 stars 57 Reviews
Global Trade Identification Number	00793950443002
Included Components	Digital Psychrometer
Item Weight	0.02 Kilograms
Item weight	0.02 Kilograms
Manufacturer	Extech
Mounting Type	Tabletop
Mounting type	Tabletop
Operating Humidity	10% to 90%
Operating humidity	10% to 90%
Temperature Accuracy	+1°C
UPC	793950443002 796841974500
Unit Count	1 Count
Upper Temperature Rating	122 Degrees Fahrenheit
Voltage	1.5 Volts (DC)

Reviews

A**R

Good value.

27.09.2025

E**S

Hand held vochtigheidsmeter Extech RH300

Kan alleer maar gekalibreerd worden mits kit RH 305 te gebruiken of zelf gemaakt equivalent RH 33% en RH57% ijkstandaarden. De fabrieksijking is corect. Goed toestel voor weinig geld. Goede technische ondersteuning vanuit VS.

9.06.2025

T**E

Works well

10.05.2018

G**N

good item have used these types off and on for years

15.11.2023

T**0

Cheap Meter works OK

18.09.2012

Common Questions

Are the products genuine and authentic?+

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.

What is Desertcart? Is it safe to order from?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

53119 som

Duties & taxes incl.

Kyrgyzstanstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews