Vapour Pressure Deficit Monitor + Sensor Module (Without CO2 Sensor)


Increase your yields and prevent crop stress.

Our smart grow room monitor lets you track and optimise
the essential environmental conditions in your grow, and will send you instant alerts if something goes wrong.

Dial in your grow with 24/7 live and historical data:

☁️ Vapor Pressure Deficit
🌡️ Ambient temperature
🌡️ Leaf temperature
💧 Relative Humidity
🌱 Dew Point

Get peace of mind with our cross-platform app:
Instant, reliable alerts, customised for your grow
Up 2 16 sensors per monitor,
locations, and WiFi networks viewable on one dashboard
Integrated memory to store and sync data in case of connection loss
Day & night averages for any selected time period
Connectivity & power outage notifications
Works on iOS, Android, PC, and Mac

VPD Monitor is made in the Netherlands, uses Swiss-made sensors, and is backed by a one year warranty. If you have any questions or problems, our English speaking support team is standing by to help, and if you’re unsatisfied for any reason, we offer quick and easy hassle-free returns.

Guarantee money back if you’re not satisfied, for 30 days after receiving your order.
Warranty 1 year, defects and workmanship.



Box contents
1. VPD monitor Display unit
2. VPD sensor module (Blue) with hanger
3. UTP cable (2 meter/ 79 inches)
4. Power Adapter AC/DC 12v 1A 12 W
5. Manual (English)

● Calculates VPD
● Four sensors in one unit
● Measures ambient temperature, leaf temperature, air pressure, relative humidity
● Performs extremely accurate measurements
● Toggle on/off display lighting

Technical specifications
● Accuracy Relative Humidity: ± 4,5% RH
● Response time RH: 6 seconds
● Accuracy Temperature: ± 0,5 °C
● Temperature range: – 40 °C to 100 °C
● Rate of measurement: every second
● 1 UTP port
● Manual calibration impossible


Monitor Specifications


Device Height
3.5 inches (89 mm)

Device Width
5.1 inches (130 mm)

Device Depth
1.77 inches (45 mm)

Device Weight
7.4 ounces (210 grams)

Box Height
4.33 inches (110 mm)

Box Width
10.6 inches (260 mm)

Box Depth
6.3 inches (160 mm)

Box Weight
25 ounces (712 grams)


110V-220V AC with 9V adapter



Leaf Temperature
-40°F to 185°F (-40 to 85°C), ±1%

±4%, 1s response time

Typ. relative humidity accuracy 3%RH
Operating relative humidity range 0 – 95 %RH
Response time (τ63%) 8s
Calibration certificate Factory calibration

Typ. temperature accuracy 0.4 °C
Operating temperature range -40 – 70 °C
Response time (τ63%) 10 s
Generic Supply voltage 3.3 – 5.5 V
Average supply current 19000 uA
Max. supply current 75000 uA
Interfaces I²C, ModBus, PWM

Attachment Points

Keyhole / diagonal fit
Indoor/outdoor: indoor
WiFi Spectrum: 2.4 GHz
WiFi Range: Over 1000 feet in ideal conditions, structures and interference reduce this


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