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Stainless steel industrial vacuum gauge with 2 1/2 inch dial and bottom NPT connection

Ashcroft

Ashcroft 251009SW02LXLLVAC vacuum gauge +/-1.0% 304 stainless steel

SKU CH-XZN1-5H71J

Industrial vacuum gauge with ±1.0% accuracy, 304 stainless steel case, IP54/IP65 rated, 2½ in dial, ¼ in NPT bottom connection

  • Color and finishStainless Steel
  • Product typeElectronic
  • Accurate vacuum monitoring with ±1.0% precision
  • Durable 304 stainless steel construction resists corrosion
  • IP54 vented and IP65 sealed protection options
  • 2½ inch dial with clear polycarbonate lens
  • Bottom ¼ inch NPT male connection for direct mounting

Industrial vacuum gauge with ±1.0 % accuracy

The Ashcroft 251009SW02LXLLVAC is an electronic vacuum gauge built for industrial pressure measurement. Its 304 stainless steel case and polycarbonate lens suit harsh environments where corrosion resistance matters. The unit reads a primary range of 30 to 0 and carries IP54 protection when the vent plug is open or IP65 and NEMA 4 when closed. Engineers and technicians who need reliable vacuum monitoring on process lines will find it fit for purpose. Buyers who require a filled gauge or a different connection orientation should look elsewhere.

Thermals noise and power in normal use

The gauge operates mechanically without an external power supply, so it adds no electrical load or fan noise to the installation. Its PLUS! Performance dampening feature steadies the pointer against vibration and pressure pulsations. The 304 stainless steel case dissipates ambient heat naturally, keeping readings stable across temperature swings. No active cooling or wiring is involved, making it silent in service.

Build quality and daily mounting implications

The 1/4 inch male NPT bottom connection threads directly into standard process ports, allowing quick installation with common pipe tools. A metallic finish resists surface wear, while the polycarbonate lens guards against impact and chemical splash. The case is not field fillable, so the dry dampening remains sealed for the life of the instrument. Users needing a rear-entry mount or a panel-cutout bezel will need a different model.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $46.99
Cheaper than about 54% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameASHCROFT
Color and finishStainless Steel
Product typeElectronic

Questions about this item

How do I install the 1/4 in NPT male bottom connection, and what step is often missed?

Thread the gauge into the port using the 1/4 in NPT male fitting; the step often missed is ensuring the vent plug is set correctly — open for IP54 or closed for IP65 and NEMA 4 sealing.

What maintenance will the polycarbonate lens and dry PLUS! Performance dampening need later?

Inspect the polycarbonate lens for cracks or clouding and replace if damaged; the dry PLUS! Performance dampening is sealed and not field-fillable, so no fluid service is required.

Which limit appears first during continuous vacuum cycling on the 30 to 0 range?

The +/-1.0% full-scale accuracy band is the first limit reached; the gauge maintains this tolerance across the 30 to 0 range without drift from the dry dampening system.

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