Casio · Pro Trek · Ref PRG-270-1
Compass. Altimeter. Barometer. Thermometer. Nothing else.
The cheapest way into Casio’s Triple Sensor. Module 3415 reads bearing, altitude, pressure and temperature onto a plain digital screen, charges from light, and is rated to 100m. Radio sync and analogue hands were left off to hit the price.
Module readout
01 /
Module 3415
Press the large textured button on the case side and the screen shows a bearing in degrees, with the cardinal points printed around the bezel for reference. Switch modes and the same screen gives altitude, barometric pressure and temperature, all from the sensor cluster Casio calls Triple Sensor Version 3.
The barometer also watches for a sudden pressure change and can sound an alarm, which on a mountain is the difference between a warning and a surprise. World time and the usual Casio calendar sit behind the sensor modes.
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What was stripped out
Dearer Pro Treks add Multi-Band 6 radio timekeeping, analogue hands, sapphire crystals and titanium. The PRG-270 has none of those. The time is set by hand, the display is a single LCD, the crystal is mineral glass and the case is resin.
What it keeps is the part that costs Casio the most to develop: the sensors. For a first outdoor watch, or a second one that lives in a pack, that is the right thing to keep.
03 /
On the wrist
The case is 54.6mm long, 52.4mm wide and 15mm thick. It is a large watch and it does not pretend otherwise. Resin keeps the weight to about 67 grams, and Tough Solar keeps the caseback shut for good.
A 100m rating covers swimming and river crossings. There is no bezel to rotate; the ring around the display is printed with a 0 to 360 degree scale so a bearing on the screen can be matched to a direction on the ground.
Specs
- Reference
- PRG-270-1
- Case size
- 54.6 × 52.4 × 15mm
- Case material
- Resin
- Movement
- Tough Solar (Solar Quartz)
- Caliber type
- Tough Solar Quartz (No Battery Change)
- Crystal
- Mineral Glass
- Water resistance
- 100m (10 ATM)
- Power reserve
- Tough Solar (Rechargeable)
- Complications
- Triple Sensor (Compass, Altimeter/Barometer, Thermometer), Digital Display, World Time
- Origin
- Casio (Japan)
Specifications as published by Casio. We research from manufacturer documentation and published sources rather than hands-on testing. Researched 2026-09-03.
Verdict
Casio’s full Triple Sensor on a plain solar digital, 100m rated, in a big resin case: the sensors without the extras.
Strengths
- Compass, altimeter, barometer and thermometer on one module
- Tough Solar charging means no battery changes
- 100m water resistance and a resin case that shrugs off knocks
- The cheapest route into a genuine Pro Trek sensor suite
Trade-offs
- No radio or Bluetooth time sync; you set it yourself
- All-digital, so no hand swings to point north
- 52.4mm wide and 15mm thick
- Mineral glass, not sapphire
Buy it if
Hikers and campers who want real sensor readings on a budget and do not care how the time gets set.
Skip it if
You want an analogue compass hand, automatic time sync or a slimmer case. The PRG-340 is lighter; the PRW-B1000 is the one with sapphire and radio.
FAQ
No. It has no Multi-Band 6 receiver and no Bluetooth. The time is set manually. Radio sync is what separates it from the PRW-series Pro Treks.
Sources
- Casio Pro Trek PRG-270-1A, Casio Philippines product page
- Casio PRG-270-1 Triple Sensor, Amazon listing
Researched and last updated 2026-09-03. We do not test watches in hand; every figure above is traceable to the manufacturer or the sources listed here.
Casio Pro Trek PRG270-1
Reference PRG-270-1 · $150–$250
Prices and availability change; the band above is a research figure, so check the current listing.
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