Meet the Vexilar Deptherm, model 104 — a compact, two-in-one depth and water-temperature tool built for serious anglers who want quick, accurate readings on every trip. 
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Two-in-one measurements: Depth (calibrated in feet as water enters the tube) and temperature (via a dedicated temperature plate after a 30-second immersion) in a single, compact instrument.
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Compact, purpose-built design: 5" length; Model 104; lightweight and easy to attach to line or gear you already use on the boat or ice.
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How it works: Attach to your line and sink to the bottom or an intermediate depth. Hold for 30 seconds, then surface. Read depth at the top of the water column and temperature from the plate. Invert to release water, then shake to expel before reuse.
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Downrigger compatibility: Clip the Deptherm 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.
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Specifications: Length 5"; Model 104; Brand Vexilar; UPC 052762881045.
By delivering precise depth data and reliable water-temperature readings, the Deptherm helps you target the temperature range where fish are most actively feeding and stay within the optimal depth-temperature window. This enables on-the-spot decisions that can boost daily catch potential on both ice and open-water trips.