Comparing dive computers
A table of features follows below for some popular computers.
Further Below are some photos that compare various computers. Below is the TDC-3, the Liquivision X1, the Shearwater Predator, Perdix and Teric.
Table of computer features. |
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| Petrel 2 | Perdix | OTSC Plus | TDC-3 | ||
| OC mode |  |
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| CCR SetPoint mode | |
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| EXT pO2 cell connector option | |
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| Bottom timer (Guage) mode | |
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| DIR stop table mode | |
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| Decompression models | ZHL-C+GF (VPM-B option extra) | ZHL-C+GF (VPM-B option extra) | ZHL-C+GF | ZHL-C+GF, VPM-B, VPM-B/E | |
| Display | 2.4 LCD - air space (refraction) | 2.2 TFT - air space (refraction) | 2.4 TFT surface mounted | 2.2 TFT surface mounted | |
| Gasses | 5 OC, 5 CC | 5 OC, 5 CC | ?? | 10 OC, 10 CC, 5 Bail 1, 5 Bail 2 | |
| Bail out modes inbuilt | 1 | 1 | |
2 | |
| Inbuilt dive simulator | |
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| Dive planning | |
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| Compass | 45° tilt |
45° tilt |
90° tilt |
90° tilt |
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| Ascent / desent rates | Graphic bar only | Graphic bar only | |
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| Wireless updates | Bluetooth via dedicated app |
Bluetooth via dedicated app |
Bluetooth via dedicated app |
WiFi - direct from web |
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| Wireless divelogs | Bluetooth via dedicated app |
Bluetooth via dedicated app |
Bluetooth via dedicated app |
WiFi - direct to web - view anywhere. |
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| Battery type/s | AA size from 1.2 to 3.7v, disposable or rechargable | AA size from 1.2 to 3.7v, disposable or rechargable | AA size from 1.2 to 3.7v, disposable or rechargable | DUAL AA size from 1.2 to 3.7v, disposable or rechargable | |
| Backup battery power supply | |
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| Button type | Piezo - fixed | Piezo - fixed | Piezo - adjustable | Piezo - adjustable | |
| Tapping menu navigation | |
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| Body type | Delrin block | Moulded plastic | Machined / anodized alloy | Machined / anodized alloy | |
| Viewport | Plastic | Plastic | Borosilicate glass | Borosilicate glass | |
| Mounting | Elastic strap | Bungee or elastic strap | Bungee | Bungee or Nato watch band | |
| Dimensions | 100 mm x 74 mm x 38 mm | 83 mm x 74 mm x 39 mm | 66 mm x 65 mm x 20 mm | 74 mm x 83 mm x 20 mm | |
| Petrel 2 | Perdix | OTSC Plus | TDC-3 | ||
