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Vaporizer Comparison

G Pen Pro vs Tempest 2

Side-by-side specs, pricing context, and clear decision guidance.

G Pen Pro

G Pen Pro

Grenco Science $90

VS
Tempest 2

Tempest 2

Mad Heaters from £149.17 GBP

Editorial Summary

G Pen Pro and Tempest 2 are both portable / convection vaporizers, but they target different priorities. G Pen Pro is usually the lower-cost pick at $90, around $89 below Tempest 2. Heat-up speed is broadly similar between the two.

Specs Compared

22

Different Specs

20

Shared Specs

2

Overall Overlap

9%

Shared Traits

Portable Convection

Head-to-Head Highlights

A quick snapshot of the specs people usually care about first.

Price (USD)

G Pen Pro edge

G Pen Pro

$90

Tempest 2

$179

G Pen Pro is typically around $89 lower.

Heat-Up Time

Close call

G Pen Pro

~30 seconds

Tempest 2

~30-45 seconds with torch

Both devices are in a similar heat-up range.

Heating Style

Close call

G Pen Pro

Convection

Tempest 2

Convection-heavy with thermal ball matrix

Heating style differs, which can impact flavor and extraction behavior.

Key Differences at a Glance

Top specs where these two devices diverge.

10 differences

Price (USD)

G Pen Pro

$90

Tempest 2

$179

Heating Type

G Pen Pro

Convection

Tempest 2

Convection-heavy with thermal ball matrix

Heat Up Time

G Pen Pro

~30 seconds

Tempest 2

~30-45 seconds with torch

Temperature Range

G Pen Pro

190°C - 220°C (375°F - 428°F)

Tempest 2

N/A

Chamber Capacity

G Pen Pro

~0.25 grams

Tempest 2

0.1g - 0.2g (adjustable)

Battery Type

G Pen Pro

Internal

Tempest 2

None

Battery Capacity

G Pen Pro

2200mAh

Tempest 2

N/A

Charging

G Pen Pro

Micro-USB

Tempest 2

N/A

Charge Time

G Pen Pro

<3 hours

Tempest 2

N/A

Power Adjustment

G Pen Pro

Modular - 3 Stages

Tempest 2

Visual gauge with click indicators

Choose G Pen Pro if...

  • You want the lower listed entry price ($90 vs $179).
  • You prefer a convection heating profile.
  • Your usage leans toward budget and electronic sessions.
View G Pen Pro Profile

Choose Tempest 2 if...

  • You prefer a convection-heavy with thermal ball matrix heating profile.
  • Your usage leans toward analog and premium sessions.
  • You prefer Tempest 2's overall feature mix and form factor.

Current price

£149.17GBP

at Mad Heaters

Check price
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Prices are read automatically from retailer pages and were last checked Aug 27, 2026; 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.

20 differ 2 shared
SpecificationG Pen ProTempest 2
Price (USD) $90$179
Device Type PortablePortable
Heating Type ConvectionConvection-heavy with thermal ball matrix
Heat Up Time ~30 seconds~30-45 seconds with torch
Temperature Range 190°C - 220°C (375°F - 428°F)N/A
Chamber Capacity ~0.25 grams0.1g - 0.2g (adjustable)
Battery Type InternalNone
Battery Capacity 2200mAhN/A
Battery Life N/A
Charging Micro-USBN/A
Charge Time <3 hoursN/A
Dimensions 122mm x 18.5mm
Weight 46g
Power Adjustment Modular - 3 StagesVisual gauge with click indicators
Chamber Material CeramicTitanium
Brand Grenco ScienceMad Heaters
Adjustable Airflow Yes
Body Material Grade 5 titanium, aluminum heat shield, stainless steel
Country of Manufacture Made in China, Assembled in the UK
Release Date 2017
Session Style Session
Warranty 1 year1 year

Comparison FAQs

What is the biggest difference between the G Pen Pro and the Tempest 2?

The biggest practical difference is heating approach: G Pen Pro runs convection while Tempest 2 runs convection-heavy with thermal ball matrix. That changes flavor delivery, vapor density, and how the device responds to slow versus fast draws.

Which is cheaper, the G Pen Pro or the Tempest 2?

G Pen Pro is the cheaper option at $90 compared with $179 for the Tempest 2, about $89 less. Live retailer pricing can shift, so confirm before buying.

Which heats up faster, the G Pen Pro or the Tempest 2?

G Pen Pro reaches session-ready temperature in ~30 seconds, while the Tempest 2 takes ~30-45 seconds with torch. That's roughly 8 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 Tempest 2?

G Pen Pro uses convection heating, while the Tempest 2 uses convection-heavy with thermal ball matrix. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.

Does the G Pen Pro or the Tempest 2 hold more flower?

G Pen Pro has the larger chamber at ~0.25 grams, versus 0.1g - 0.2g (adjustable) on the Tempest 2. A bigger bowl means fewer reloads on long sessions; a smaller one suits microdosing and quicker bowls.

Can I set custom temperatures on the G Pen Pro or the Tempest 2?

G Pen Pro controls heat with modular - 3 stages, while the Tempest 2 uses visual gauge with click indicators. Both let you change temperature, just with different levels of precision.

How similar are the G Pen Pro and the Tempest 2?

Across the 22 specs we line up, they share 2 and differ on 20, an overlap of about 9%. The differences are concentrated in the areas the spec table highlights with a marker.

Need a different matchup?

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