Price (USD)
G Pen Pro edgeG Pen Pro
$90
Hydrology9
$199
G Pen Pro is typically around $109 lower.
Vaporizer Comparison
G Pen Pro vs Hydrology9
Side-by-side specs, pricing context, and clear decision guidance.
G Pen Pro
Grenco Science $90
VS
Hydrology9
Cloudious9 $199
Editorial Summary
G Pen Pro and Hydrology9 are both portable / electronic vaporizers, but they target different priorities. G Pen Pro is usually the lower-cost pick at $90, around $109 below Hydrology9. G Pen Pro has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
18
Different Specs
12
Shared Specs
6
Overall Overlap
33%
Shared Traits
Portable Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
G Pen Pro edgeG Pen Pro
~30 seconds
Hydrology9
~1 minute
G Pen Pro has the quicker listed heat-up profile.
Heating Style
Close callG Pen Pro
Convection
Hydrology9
Conduction
Heating style differs, which can impact flavor and extraction behavior.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
G Pen Pro
$90
Hydrology9
$199
Heating Type
G Pen Pro
Convection
Hydrology9
Conduction
Heat Up Time
G Pen Pro
~30 seconds
Hydrology9
~1 minute
Temperature Range
G Pen Pro
190°C - 220°C (375°F - 428°F)
Hydrology9
250°F-430°F
Chamber Capacity
G Pen Pro
~0.25 grams
Hydrology9
~0.5 grams
Battery Capacity
G Pen Pro
2200mAh
Hydrology9
2000mAh
Charge Time
G Pen Pro
<3 hours
Hydrology9
~2 hours
Power Adjustment
G Pen Pro
Modular - 3 Stages
Hydrology9
Modular - 5 stage
Brand
G Pen Pro
Grenco Science
Hydrology9
Cloudious9
Warranty
G Pen Pro
1 year
Hydrology9
2 years
Choose G Pen Pro if...
- You want the lower listed entry price ($90 vs $199).
- You care about faster heat-up time for quicker sessions.
- You prefer a convection heating profile.
- Your usage leans toward budget and convection sessions.
Choose Hydrology9 if...
- You prefer a conduction heating profile.
- Your usage leans toward conduction sessions.
- You prefer Hydrology9's overall feature mix and form factor.
Typical price
$199
Sold by To the Cloud Vapor Store
Prices are read automatically from retailer pages; confirm the price at checkout. Some links are affiliate links, which support Thermal Extractions at no extra cost to you.
Spec Comparison Table
Direct comparison of every spec from each device profile.
12 differ 6 shared
| Specification | G Pen Pro | Hydrology9 |
|---|---|---|
| Price (USD) | $90 | $199 |
| Device Type | Portable | Portable |
| Heating Type | Convection | Conduction |
| Heat Up Time | ~30 seconds | ~1 minute |
| Temperature Range | 190°C - 220°C (375°F - 428°F) | 250°F-430°F |
| Chamber Capacity | ~0.25 grams | ~0.5 grams |
| Battery Type | Internal | Internal |
| Battery Capacity | 2200mAh | 2000mAh |
| Charging | Micro-USB | Micro USB |
| Charge Time | <3 hours | ~2 hours |
| Dimensions | — | ~4.5 x ~17.5cm |
| Power Adjustment | Modular - 3 Stages | Modular - 5 stage |
| Chamber Material | Ceramic | Ceramic |
| Brand | Grenco Science | Cloudious9 |
| Release Date | 2017 | 2017 |
| Session Style | Session | Session |
| Warranty | 1 year | 2 years |
| Water Filtration | — | Yes |
Comparison FAQs
What is the biggest difference between the G Pen Pro and the Hydrology9?
The biggest practical difference is price tier: the G Pen Pro sits at $90 while the Hydrology9 is $199, a gap of about $109 that puts them in different buying brackets.
Which is cheaper, the G Pen Pro or the Hydrology9?
G Pen Pro is the cheaper option at $90 compared with $199 for the Hydrology9, about $109 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the G Pen Pro or the Hydrology9?
G Pen Pro reaches session-ready temperature in ~30 seconds, while the Hydrology9 takes ~1 minute. That's roughly 30 seconds quicker on the G Pen Pro, which is useful if you want shorter, on-demand sessions.
What's the difference in heating between the G Pen Pro and the Hydrology9?
G Pen Pro uses convection heating, while the Hydrology9 uses conduction. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.
Does the G Pen Pro or the Hydrology9 hold more flower?
Hydrology9 has the larger chamber at ~0.5 grams, versus ~0.25 grams on the G Pen Pro. A bigger bowl means fewer reloads on long sessions; a smaller one suits microdosing and quicker bowls.
Which charges faster, the G Pen Pro or the Hydrology9?
Hydrology9 fully charges in ~2 hours, ahead of <3 hours on the G Pen Pro.
How similar are the G Pen Pro and the Hydrology9?
Across the 18 specs we line up, they share 6 and differ on 12, an overlap of about 33%. The differences are concentrated in the areas the spec table highlights with a marker.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.