Black VIVOSUN IR thermometer with digital display showing temperature and humidity readings.

Black infrared thermometer displays VPD, temp, and humidity for plants. Images show air, leaf VPD, and ambient conditions.

Vivosun thermometer with 12:1 D:S ratio, showing beam cones for distance measurements.

Vivosun VPD thermometer with wide range, fast reading, and high accuracy features.

Vivosun VPD thermometer displays temperature readings on steel, water, leafy plants, and wood.

Vivosun VPD thermometer measures leaf temperature of tomato plants in a grow tent.

Vivosun infrared thermometer: specs, dimensions, and accessories including batteries and carrying case.

Vivosun VPD thermometer displays inside temps 75.2°F, 63% humidity. Outside 65.2°F. 98 CO2.

Ask Sage about this product

Vivosun VPD Infrared Laser Thermometer

Official VIVOSUN Dealer Model: WEB-VSE-VT001

$29.99 USD

Reads surface temperatures from -58°F to 896°F with a 5-second response time
Uses a 13-point circular laser pattern for precise targeting of specific leaf areas
Includes adjustable emissivity settings to calibrate for different material surfaces
2-year warranty against manufacturing defects
View More Details

Earn 29 points for shopping and get $0.29 off your next order. Join Harvest Club for free.

Questions? Talk to a specialist. Mon–Fri, 9am–5pm PST

(360) 800-5535 Live Chat Available now

Free Shipping On Most Items* To the lower 48

Transparent Pricing Backed w/ price match guarantee

4.8/5 average Top Quality Store on Google

Secure Checkout SSL encrypted payments

Ask Sage about this product

VOLUME PRICING

Commercial & Bulk Purchasing

We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.

Overview
Features
What's Included
Specifications
Support & Manuals
Warranty
Frequently Asked Questions
Reviews

Who This Is For

You are checking leaf surface temperatures because you need to catch transpiration stress before it slows your yield
You are tracking your room's vapor pressure deficit because you want to stop guessing your climate settings

What We Found

The 12:1 distance ratio is tight enough to isolate leaf temps even inside a crowded canopy
We like that the emissivity is adjustable because it actually gives you a true reading on different leaf surfaces

What Users Say

Growers who stopped relying on generic air sensors say they finally dialed in their humidity for better development
Users report that the high-low alerts caught room shifts during the night that they would have otherwise missed

VIVOSUN VPD Infrared Laser Thermometer

Guesswork in your grow space costs you yield. The VIVOSUN VSE-VT001 VPD Thermometer delivers fast 5-second readings across a -58°F to 896°F (-50°C to 480°C) range, tracking leaf and air VPD, ambient and leaf temperature, and humidity so you can make precise adjustments before plant stress sets in.

A 13-point laser targets your exact measurement spot from a safe distance, backed by a 12:1 distance-to-spot ratio for accuracy even on hard-to-reach surfaces. Adjustable emissivity from 0.1 to 1.00 (default 0.98) lets you dial in readings on virtually any material, making the VSE-VT001 equally useful for HVAC checks, electrical testing, and kitchen tasks beyond the grow room.

The backlit LCD stays readable in low light, stores up to 5 past readings for quick comparison, and powers down automatically after 30 seconds to save battery. Built-in high/low alerts flash a red indicator the moment your readings move outside your set range, so problems get caught early.

Features

VIVOSUN VPD Thermometer high infrared laser

VIVOSUN VPD Thermometer size and grip detail

🌡️

Multi-Function Thermometer

Measures -58°F to 896°F with fast 5-second readings for plant care, HVAC, and electrical testing.

🍃

VPD Monitoring for Better Planting

Tracks leaf and air VPD so you can fine-tune your grow space for optimal growth and nutrient absorption.

🎯

Adjustable Emissivity & High Accuracy

Emissivity range of 0.1 to 1.00 with a 12:1 distance-to-spot ratio for safe, accurate readings from afar.

🔋

User-Friendly Design

Large backlit LCD, storage for 5 past readings, and auto power-off after 30 seconds to preserve battery.

🔴

Safe & Accurate

A 13-point circular laser indicator pinpoints your target while flashing high/low alerts warn when readings exceed your set range.

⚡

Fast Response Time

Responds in under 500ms at an 8–14 μm wavelength, delivering near-instant readings whenever you need them.

What's Included

1x Thermometer
2x AAA Batteries
1x Storage Bag

Specifications

Specification	Value
Model Name	VSE-VT001
Product Dimensions	6.1 × 3.62 × 1.65 in. (155 × 92 × 42 mm)
Display Size	1.14 × 1.06 in. (29 × 27mm)
Product Weight	0.397 lbs. (180g)
Infrared Temperature Range	-58°F to 896°F (-50°C to 480°C)
Infrared Temperature Accuracy	32°F–896°F: ±(1.5%+5°F); -58°F–32°F: ±5°F 0°C–480°C: ±(1.5%+1°C); -50°C–0°C: ±3°C
Response Time & Wavelength	<500ms, 8–14 μm
Distance-to-Spot Ratio (D:S)	12:1
Emissivity	Adjustable 0.1–1.00 (Default: 0.98)
Laser Positioning	13-Point Circular Indicator, 650nm, <1mW, Class 2 Laser
Ambient Temperature Accuracy	-4°F to 140°F ±2°F (-20°C to 60°C ±1°C)
Ambient Humidity Accuracy	1%–99% RH ±4%
Auto Power Off	30 seconds
Power Supply	2 × 1.5V AAA (R03/LR03)
Operating Temperature	32°F to 122°F (0°C to 50°C)
Storage Temperature	-4°F to 140°F (-20°C to 60°C)

Support & Manuals

📄 VPD Thermometer Manual

Warranty

The VIVOSUN VSE-VT001 VPD Thermometer is backed by a 2-year warranty against manufacturing defects for products purchased directly from VIVOSUN or authorized dealers.

Frequently Asked Questions

What is VPD and why does it matter for my plants?+

VPD, or vapor pressure deficit, measures the gap between the moisture in the air and the moisture a leaf can hold. Monitoring leaf and air VPD helps you adjust temperature and humidity for optimal growth and nutrient absorption.

Can I use this thermometer outside of plant care?+

Yes. With adjustable emissivity from 0.1 to 1.00, the VSE-VT001 works well for HVAC checks, electrical testing, and kitchen or food processing tasks in addition to grow room monitoring.

How accurate is the laser targeting?+

A 13-point circular laser indicator pinpoints your exact measurement area, and a 12:1 distance-to-spot ratio lets you take safe, accurate readings from a distance without getting close to the surface.

How fast are the readings?+

The VSE-VT001 delivers readings in under 500ms, with full temperature results in about 5 seconds across its -58°F to 896°F range.

What happens if a reading goes outside my target range?+

The unit flashes a red indicator and sounds a high/low alert whenever a reading moves outside the range you've set, so you can catch issues before they affect your plants.

Does it come with batteries?+

Yes, the VSE-VT001 ships with the 2 × 1.5V AAA batteries it requires, so it's ready to use right out of the box.

How many past readings can it store?+

The thermometer stores up to 5 previous readings, making it easy to compare results without writing them down.

Happy To Help

Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

10+

Years of Specialist Knowledge

4.8★

1948+ Verified Reviews

50,000+

Growers Served

120+

Top Equipment Brands in Stock

Search