Price (USD)
Hydrology9 edgeHydrology9
$199
Zeus Arc GT4
$260
Hydrology9 is typically around $61 lower.
Vaporizer Comparison
Hydrology9 vs Zeus Arc GT4
Side-by-side specs, pricing context, and clear decision guidance.
Hydrology9
Cloudious9 $199
VS
Zeus Arc GT4
Zeus Arsenal $260
Editorial Summary
Hydrology9 and Zeus Arc GT4 are both portable / conduction vaporizers, but they target different priorities. Hydrology9 is usually the lower-cost pick at $199, around $61 below Zeus Arc GT4. Zeus Arc GT4 has the quicker listed heat-up profile, which can matter for shorter sessions.
Specs Compared
26
Different Specs
23
Shared Specs
3
Overall Overlap
12%
Shared Traits
Portable Conduction Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heat-Up Time
Zeus Arc GT4 edgeHydrology9
~1 minute
Zeus Arc GT4
~35 seconds
Zeus Arc GT4 has the quicker listed heat-up profile.
Heating Style
Close callHydrology9
Conduction
Zeus Arc GT4
Conduction
Both devices use a similar heating approach.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
Hydrology9
$199
Zeus Arc GT4
$260
Heat Up Time
Hydrology9
~1 minute
Zeus Arc GT4
~35 seconds
Temperature Range
Hydrology9
250°F-430°F
Zeus Arc GT4
195-225°C (383-437°F) herb, 235-255°C (455-491°F) wax
Chamber Capacity
Hydrology9
~0.5 grams
Zeus Arc GT4
Up to ~0.4g in an ArcPod, spacer included for smaller loads
Battery Capacity
Hydrology9
2000mAh
Zeus Arc GT4
3500mAh
Charging
Hydrology9
Micro USB
Zeus Arc GT4
USB-C (5V, 2.5A, 12.5W)
Charge Time
Hydrology9
~2 hours
Zeus Arc GT4
~90 minutes
Dimensions
Hydrology9
~4.5 x ~17.5cm
Zeus Arc GT4
86.5 x 42.5 x 22.5mm
Power Adjustment
Hydrology9
Modular - 5 stage
Zeus Arc GT4
Presets (6 herb levels, 3 wax levels)
Chamber Material
Hydrology9
Ceramic
Zeus Arc GT4
24K gold coated
Choose Hydrology9 if...
- You want the lower listed entry price ($199 vs $260).
- You prefer Hydrology9's overall feature mix and form factor.
- You value how the Hydrology9 balances size, controls, and everyday practicality.
Typical price
$199
Sold by To the Cloud Vapor Store
Choose Zeus Arc GT4 if...
- You care about faster heat-up time for quicker sessions.
- Your usage leans toward concentrates and discrete sessions.
- You prefer Zeus Arc GT4's overall feature mix and form factor.
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.
23 differ 3 shared
| Specification | Hydrology9 | Zeus Arc GT4 |
|---|---|---|
| Price (USD) | $199 | $260 |
| Device Type | Portable | Portable |
| Heating Type | Conduction | Conduction |
| Heat Up Time | ~1 minute | ~35 seconds |
| Temperature Range | 250°F-430°F | 195-225°C (383-437°F) herb, 235-255°C (455-491°F) wax |
| Chamber Capacity | ~0.5 grams | Up to ~0.4g in an ArcPod, spacer included for smaller loads |
| Battery Type | Internal | Internal |
| Battery Capacity | 2000mAh | 3500mAh |
| Battery Life | — | ~6-8 sessions per charge |
| Charging | Micro USB | USB-C (5V, 2.5A, 12.5W) |
| Charge Time | ~2 hours | ~90 minutes |
| Dimensions | ~4.5 x ~17.5cm | 86.5 x 42.5 x 22.5mm |
| Weight | — | ~121 grams |
| Power Adjustment | Modular - 5 stage | Presets (6 herb levels, 3 wax levels) |
| Chamber Material | Ceramic | 24K gold coated |
| Concentrate Support | — | Yes, via the WaxPod and a dedicated wax mode |
| Brand | Cloudious9 | Zeus Arsenal |
| Adjustable Airflow | — | Yes (Flow Sink in for a restricted draw, out for a free draw) |
| Display Type | — | 3 LED status interface |
| Haptic Feedback | — | Yes |
| Manufacturer | — | Thermodyne Systems |
| Release Date | 2017 | 2025 |
| Session Style | Session | Session (6 minute herb cycle, ~2 minute wax cycle) |
| Warranty | 2 years | 2 years, extendable to 3 with registration (battery 3 months) |
| Water Filtration | Yes | — |
| Water Pipe Adapter | — | Included, fits 14mm and 18mm glass |
Comparison FAQs
What is the biggest difference between the Hydrology9 and the Zeus Arc GT4?
The biggest practical difference is heat-up speed: the Zeus Arc GT4 is ready in ~35 seconds versus ~1 minute on the Hydrology9, which changes whether it feels on-demand or scheduled.
Which is cheaper, the Hydrology9 or the Zeus Arc GT4?
Hydrology9 is the cheaper option at $199 compared with $260 for the Zeus Arc GT4, about $61 less. Live retailer pricing can shift, so confirm before buying.
Which heats up faster, the Hydrology9 or the Zeus Arc GT4?
Zeus Arc GT4 reaches session-ready temperature in ~35 seconds, while the Hydrology9 takes ~1 minute. That's roughly 25 seconds quicker on the Zeus Arc GT4, which is useful if you want shorter, on-demand sessions.
Does the Hydrology9 or the Zeus Arc GT4 hold more flower?
Hydrology9 has the larger chamber at ~0.5 grams, versus Up to ~0.4g in an ArcPod, spacer included for smaller loads on the Zeus Arc GT4. A bigger bowl means fewer reloads on long sessions; a smaller one suits microdosing and quicker bowls.
Which charges faster, the Hydrology9 or the Zeus Arc GT4?
Zeus Arc GT4 fully charges in ~90 minutes, ahead of ~2 hours on the Hydrology9.
Can I use the Hydrology9 or the Zeus Arc GT4 with a water pipe?
Only the Zeus Arc GT4 has a documented water-pipe adapter option. The Hydrology9 doesn't list one, though aftermarket adapters sometimes exist for popular models.
Which is more discreet, the Hydrology9 or the Zeus Arc GT4?
Zeus Arc GT4 is the better pick if low-profile use matters. It's tagged as stealth or pocket-friendly in our database, while the Hydrology9 is more conspicuous in hand and harder to keep out of sight.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.