Meet the Vexilar Deptherm, model 104 — the smart tool that gives you the edge on every fishing trip by delivering quick, accurate depth and water temperature readings. Compact and purpose-built for serious anglers, it helps you target the best feeding zones and adjust in real time for higher catch potential.
Two essential measurements in one compact instrument
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Depth reading: As water enters the tube during descent, the trapped volume becomes a precise depth column, calibrated in feet, so you know exactly how deep you are.
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Temperature reading: A temperature plate provides close, dependable readings after a 30-second immersion.
How it works
- Attach the Deptherm to your line and let it sink to the bottom or any intermediate depth.
- Hold there for 30 seconds, then surface. Read depth on the top of the water column and temperature off the temperature plate.
- Invert the instrument and press the valve to release water. Shake until all water is expelled before reuse.
- Downrigger application: Clip the Deptherm Model 104 to your downrigger ball to monitor water temperature and depth at the rig. Note that temperature readings will lag 1–2 minutes while the ball is raised.
Why this matters for anglers
- Seeks out the correct temperature range where fish are most actively feeding.
- Helps you stay in the optimal depth and temperature window, avoiding time wasted in unproductive spots.
- Easy, on-the-spot decisions that can boost your daily catch rate.
Specifications
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Length: 5"
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Model: 104
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Brand: Vexilar
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UPC: 052762881045
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.