42001-0053S Thermistor by Pentair | MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heater Sensor

42001-0053S Thermistor by Pentair | MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heater Sensor

Marsoni

M251S

$79.99

Get it in 3 business days with 1 day shipping. Friday, May 29

42001-0053S Thermistor by Pentair | MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heater SensorThe Pentair Thermistor 42001 0053S is the OEM sensor responsible for relaying water temperature readings to your heater's control panel display. When your panel shows inaccurate or abnormally high temperature readings, a failing thermistor is typically the cause and replacement is the only remedy, as this component cannot be reset. Positioned within the manifold adapter inlet, this electronic temperature sensing thermistor continuously monitors

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The screws that secure the mount to the underside of the desk stick out enough to cause the inner dimensions to change. I had to use the next hole down to increase the size of the bracket to accommodate my device, resulting in a less secure mount than desired. If the holes were beveled so that the screws fit more flush with the mount I'd be able to give it 5 stars. But the inner dimensions are not entirely as advertised due to the screws. Quality is up to standard otherwise, installation is relatively straightforward, price point is fine for a bracket of this size.

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Reviewed in the United States on September 18, 2025

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Kris

Carnegie, US

★★★★★ 5

Great mount!

Great under desk NAS mount. Adjustable and sturdy, easy to install. Worked well for my Qnap TR-004 four slot DAS. I used 5/64 drill bit for the holes. Since my desk has a rear lip I reused rear stopper bit as a headphone hanger. I bend it slightly to a hook shape.

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Reviewed in the United States on May 6, 2025

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Brian

Grantham, US

★★★★★ 5

Tucks my NAS away

Sturdy and a major space saver. Worth the money to free up valuable desk space. Held my 6 bay QNAO NAS perfectly. Highly recommend.

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Reviewed in the United States on November 28, 2025

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Christopher Shaw

New York, US

★★★★★ 5

Perfect for under-desk NAS/DAS

Worked perfectly for my TerraMaster D320 DAS

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Reviewed in the United States on January 20, 2026

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Pedro

Battle Creek, US

★★★★★ 5

Absolutely solid!

Color: Black, Style: Fixed Width

I wish they made a longer version, because it's kinda pricey to buy two... but I made it work with one I wanted a metal one that I could screw on so I didn't have to worry about it ever again... ever. It's holding everything and doing a great job at it.

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Reviewed in the United States on March 4, 2026