how to switch from °F to °C?

Hold down on the up and down buttons at the same time

how many mats can be connected to this?

I have used these with a power splitter outlet into 2 mats and they work fine. The controler applies power till the programmed temperature is achieved then shuts off. Unit will cycle to maintain temps. I've heard the mats burn out frequently but with a controller I've never had a problem. I usually set for 54°F and tomatoes, peppers, tobbacco, leeks love it some plants pop up in 24 hrs. usually 2-3 days. A small low velocity fan will prevent damping(mold/mildews). Do not shut off heat and fan or damping will take hold in less than a day. And do not use anything other than sterile medium for seedlings/starts No fertilizers for couple weeks and definately no contaminates azomite will introduce spores/damping.

Is this a thermostat with a mat or does it work with any other mat?

It is just a thermostat. It works with anything heat outputting, like a heating lamp. The probe senses the temperature and turns the power on or off to whatever you plug into it.

Is the probe ok with saltwater ??

Instructions state "do not immerse temp probe in liquid" so no .

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Digital Heat Mat Thermostat Controller, 40–108 ºF 1000W for Reptiles, Seedlings, Germination, Incubation and Fermentation

Product ID: 18764081

Details

Brand
VIVOSUN
Color
Green
Display Type
LCD
Material
Plastic
Voltage
230 Volts

⚡Supports up to 1000W power

🔧Durable rust-proof plastic build

🌡️Precise temp control 40-108°F

$41.54

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Description

🌿 Keep your growth game on point with precision heat control!

BUILT TO ENDURE - Hexagonal, extra-fortified plastic housing resists rust and wear, ensuring long-lasting reliability in any grow or incubation setup.
TIDY CONVENIENT DESIGN - Includes hanging tab, wall mount, and angled socket to keep your workspace organized and cords perfectly managed.
EFFORTLESS SETUP CONTROL - Three-button interface lets you toggle settings and switch between °F/°C in seconds—no manual needed, no hassle.
PRECISION TEMPERATURE MASTERY - Maintain your ideal environment with an ultra-accurate 40-108°F range—perfect for delicate seedlings or sensitive reptiles.
UNIVERSAL COMPATIBILITY SAFETY - Works seamlessly with any heat mat and plugs into standard North American outlets—safe, reliable, and ready to perform.

The VIVOSUN Digital Heat Mat Thermostat Controller offers professional-grade temperature regulation from 40 to 108°F, supporting up to 1000W power. Designed with durable, rust-resistant plastic and an intuitive 3-button interface, it ensures effortless setup and reliable performance for reptiles, seedlings, germination, incubation, and fermentation. Its smart design includes a hanging tab, wall mount, and angled socket for neat cord management, compatible with any heat mat and standard North American outlets.

Specifications

ASIN	B015F4VFGI
Best Sellers Rank	#24,932 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #279 in Greenhouses & Plant Germination Equipment
Brand Name	VIVOSUN
Color	Green
Customer Reviews	4.5 4.5 out of 5 stars (5,738)
Display Type	LCD
Included Components	User Manual
Manufacturer	VIVOSUN
Material Type	Plastic
Model	330101
Operating Temperature	40 Degrees Fahrenheit
Part Number	330101
Smart Home Compatibility	Not Smart Home Compatible
UPC	742920469641
Unit Count	1.0 Count
Voltage	230 Volts
Warranty Description	1 Year

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$41.54

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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