Halcyon Master SPG Review
Last updated: July 2025
- 500 PSI reserve band: Clear low-pressure warning
- Easy to read: High-contrast dial visible at any angle
- Rugged build: Brass housing with tempered glass face
- Reliable in all conditions: Performs across fresh and salt water
- Heavier than travel gauges: Not the lightest option
The Halcyon Master SPG is a compact brass analog pressure gauge known for clear markings, a rugged housing, and tempered glass. After testing two cheaper gauges, I moved to this model for its 500 PSI reserve band and reliable readability in low light. Below are the pros, tradeoffs, and how it has performed for me across fresh, cold, and warm salt water.
Pros & Cons
| Pros | Cons |
|---|---|
| Red zone starts at 500 PSI | More expensive than generic SPGs |
| Easy to read at any angle | Not lightweight for travel |
| Brass housing with tempered glass face | No color customization |
| No issues across any dive environment |
Why I Chose the Halcyon Master SPG
I tried two cheaper SPGs before settling on the Halcyon Master. One had a red zone that started too early at 1000 PSI, the other had poor visibility underwater. This one ticked every box I cared about: compact, readable, precise, and a red zone that starts right at 500 PSI. It’s also built to last.
Verdict
It’s not flashy, but it does its job better than any budget option I’ve tried. After buying two other SPGs I didn’t like, I could have saved money by just getting this one first.
Would I buy it again? Absolutely.
Who the Halcyon Master SPG Is Best For
This item is best suited for:
- Divers who want a durable, easy-to-read analog gauge
- Backplate or traditional setups needing a standard SPG
- Anyone diving in varied conditions and needing reliability
It may not be ideal for:
- Travelers counting ounces in their luggage
- Divers seeking color-matched or customizable gauges
Deep Dive into the Score
Scoring System: Each category is scored out of 10 and weighted by importance. This model is used consistently across all gear reviews for transparency.
| Category | Score | Raw Score | Weight | Weighted |
|---|---|---|---|---|
| Function & Performance | Exceptional | 10.0 | 30% | 3.00 |
| Ease of Use | Exceptional | 9.0 | 20% | 1.80 |
| Versatility | Strong | 8.5 | 15% | 1.28 |
| Durability & Build Quality | Exceptional | 9.5 | 15% | 1.43 |
| Value | Strong | 8.0 | 10% | 0.80 |
| Brand Trust & Transparency | Exceptional | 9.0 | 10% | 0.90 |
| Total | 9.20 / 10 | |||
Rounded Display Score: 9.2 / 10 — Exceptional
Deep Dive Score Explanations
- Function & Performance – 10.0: Flawless readability and accuracy. Everything I want from an SPG.
- Ease of Use – 9.0: Simple to clip off and check quickly, even with gloves.
- Versatility – 8.5: Works on any kit, but heavier than travel-focused gauges.
- Durability & Build – 9.5: Brass body, tempered face, and no wear or issues after a year of regular use.
- Value – 8.0: More expensive than alternatives, but pays off in quality and reliability.
- Brand Trust – 9.0: Halcyon consistently produces durable, reliable gear with solid quality control.
Performance in the Water
- Visibility: Crisp markings and contrast. I can glance and get an exact read quickly, even in low light or cold water.
- Mounting: Clipped off to my left hip D-ring. Sits flat, doesn’t snag, and hoses route cleanly.
- Durability: After a year of use across quarries, Lake Michigan, cenotes, and Fiji, it still looks nearly new.
- Standardization: It’s my primary SPG across all kits and environments. I don’t rotate it out or swap configurations.