1. Air Pressure Gauges Offers
  2. sku: 18178507095319983
  3. SENCTRL Y.6UGL04.N30/30

SENCTRL Y.6UGL04.N30-30 Inhg Vacuum Glycerin Filled Water Pressure Y.6UGL04.N30/30 Gauge

Y.6ugl04.n30 Senctrl Y.6ugl04.n30/30# 30 Inhg To Psi Vacuum Glycerin Liquid Filled Low Pressure Gauge 2

( Brand: Senctrl ), ( Manufacturer Part Number: Y.6UGL04.N30/30 ), ( Part Type: Vacuum Pressure Gauge ), ( Included Components: Pressure Gauge ), ( Size: 30inhg-0-30psi ), ( Style: Lower Mount ), ( Measurement Accuracy: /-3-2-3 ), ( Thread Type: Npt ), ( Material: Stainless Steel ), ( Package Dimensions Lxwxh: 3.82x2.91x1.54 Inches ), ( Weight: 0.44 Pounds )

Review SENCTRL Y.6ugl04.n30/30# 30 Inhg To Psi Vacuum Glycerin Liquid Filled Low Pressure Gauge

The **Senctrl Y.6UGL04.N30/30 30 InHg Vacuum Glycerin-Filled Pressure Gauge** is a precision-engineered instrument designed for reliable and accurate monitoring of vacuum levels in industrial, laboratory, and HVAC/R applications where precise measurement is critical. This high-quality gauge features a robust **30-inch (762 mm) dial face** with a clear, easy-to-read scale calibrated in inches of mercury (InHg), ranging from 0 to 30, making it ideal for systems operating within standard vacuum pressures. The **glycerin-filled bourdon tube mechanism** ensures smooth, responsive operation even in environments with temperature fluctuations or minor vibrations, reducing the risk of erratic readings or mechanical failure. The glycerin fluid also acts as a damping agent, providing a stable needle movement for consistent accuracy over extended use.

Constructed from durable materials, this gauge is built to withstand demanding conditions, with a **brass or stainless steel housing** (depending on the model variant) that offers corrosion resistance and longevity in both clean and harsh environments. The **flanged connection (typically 1/4" NPT or 1/2" NPT)** allows for secure and leak-proof integration into piping systems, while the **back-mounted connection** ensures minimal installation complexity. The gauge s **aluminum or anodized aluminum dial** is designed to be resistant to scratches and wear, maintaining visibility even in high-contrast or dimly lit settings. For added safety and reliability, the gauge may include a **burst disk or pressure relief mechanism** (depending on application requirements), protecting the system from overpressure events.

Ideal for applications such as **refrigeration and air conditioning systems, laboratory vacuum chambers, industrial process control, and HVAC diagnostics**, this pressure gauge delivers both precision and durability. Its **low-maintenance design** combined with the glycerin-filled mechanism reduces the need for frequent recalibration, making it a cost-effective solution for long-term monitoring. Whether used in a controlled laboratory setting or a high-demand industrial facility, the **Senctrl Y.6UGL04.N30/30** ensures dependable performance, helping operators maintain optimal system efficiency and safety.

### **Pros and Cons of buying a Senctrl Y.6UGL04.N30/30 30 InHg Vacuum Glycerin-Filled Pressure Gauge**

#### **Pros:**

1. **Glycerin-Filled Mechanism** The glycerin filling reduces the impact of temperature fluctuations, providing more stable and accurate readings over time. This is particularly useful in environments with varying temperatures, as mercury-filled gauges can be affected by thermal expansion.

2. **Durability and Longevity** Glycerin-filled gauges are generally more robust than mercury-filled ones, as glycerin does not evaporate or freeze under normal conditions. This makes them suitable for long-term use in industrial, automotive, or HVAC applications.

3. **Wide Temperature Range Compatibility** The gauge is designed to function reliably across a broad temperature spectrum, making it versatile for different climates and applications, such as refrigeration systems, vacuum chambers, or air conditioning units.

4. **Accurate Pressure Measurement** With a range of **30 InHg (Inches of Mercury)**, this gauge is well-suited for measuring low to moderate vacuum levels, which is common in applications like HVAC systems, automotive brake systems, or laboratory equipment.

5. **Easy Installation and Replacement** Standardized mounting (likely with a 1-inch NPT or similar thread) makes it straightforward to install or replace in existing systems without extensive modifications.

6. **Cost-Effective for Industrial Use** While not the cheapest option, glycerin-filled gauges are often more affordable than high-precision mercury gauges while still offering reliable performance for many applications.

7. **Non-Toxic and Safe** Unlike mercury, glycerin is non-toxic and poses no environmental or health risks in case of leaks, making it a safer choice for general use.

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#### **Cons:**

1. **Limited Range for High-Vacuum Applications** The **30 InHg range** is suitable for moderate vacuums but may be insufficient for high-vacuum systems (e.g., scientific research, deep vacuum chambers), which often require gauges with ranges like 0-300 InHg or higher.

2. **Potential for Glycerin Leakage Over Time** While glycerin is less volatile than mercury, it can still degrade or leak from the gauge housing if the seal fails, leading to inaccurate readings or gauge failure.

3. **Less Precise Than High-End Gauges** For critical applications (e.g., aerospace, medical, or ultra-precise industrial processes), this gauge may lack the precision of digital or high-grade analog gauges with better calibration and repeatability.

4. **Subject to Mechanical Wear** Like all mechanical gauges, this one is susceptible to damage from vibration, impact, or improper handling, which could affect accuracy or functionality over time.

5. **Calibration Requirements** While glycerin-filled gauges are more stable than mercury ones, they still require periodic calibration to ensure accuracy, especially in demanding environments.

6. **Limited Brand Recognition** Senctrl is not as widely recognized as some industry giants (e.g., Ashcroft, Dwyer, or Omega), which could raise questions about long-term support, availability of spare parts, or warranty service.

7. **Potential for Condensation Issues** In very humid environments, condensation inside the gauge housing could affect readings, though glycerin is less prone to this than mercury.

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### **Conclusion**

The **Senctrl Y.6UGL04.N30/30 30 InHg Vacuum Glycerin-Filled Pressure Gauge** is a **reliable, durable, and cost-effective choice** for applications requiring moderate vacuum measurement in stable or moderately fluctuating temperature conditions. Its glycerin filling makes it a safer and more stable alternative to mercury gauges, while its **30 InHg range** is well-suited for HVAC, automotive, refrigeration, or general industrial use.

However, if you need **high-precision measurements, extreme temperature resistance, or a wider vacuum range**, you may need to consider a more specialized gauge. Additionally, if long-term warranty support or brand reputation is a concern, you might explore alternatives from well-established manufacturers.

### **Recommendation**

**Buy this gauge if:**

- You need a **durable, non-toxic, and moderately accurate** vacuum gauge for **HVAC, automotive, refrigeration, or general industrial use**.

- Your application operates within a **stable temperature range** and does not require extreme precision.

- You prefer a **mechanical gauge** over digital alternatives for simplicity and reliability.

**Consider alternatives if:**

- You require **high-vacuum or ultra-low-pressure measurements** (e.g., scientific research, aerospace).

- You need **digital readouts, remote monitoring, or advanced calibration features**.

- You operate in **extreme temperatures** (very high or low) where even glycerin-filled gauges may struggle.

- You prioritize **brand reputation and warranty support** over cost.

For most **general-purpose vacuum applications**, this gauge offers a **good balance of performance, safety, and affordability**. If in doubt, verify compatibility with your specific system and consult with a specialist if high-precision requirements exist.

Details:

The circular dial is enclosed in a 304 stainless steel case for corrosion resistance. Such as water, oil, and air pressure tests. Measures pressure with dual scale 30 inHg-0-30 Psi/-100-200 KP. Glycerin filled inhibits pointer flutter and prevents damage to the internal mechanics from vibration pulsation.

SENCTRL 30 inHg to Psi Vacuum Glycerin Liquid Filled Low Pressure Gauge, 2.5 Dial Size, 1/4 NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, HVAC, Pump Test: Brass and whetted parts measuring non-corrosive liquid gas pressure. Display accuracy is or - 3/2/3% over the entire range of gauge. Compatible with air conditioning line repair, tank, HVAC tools, pump, pipe, tube vacuum test, etc. Offer clear reading.

part #: y6ugl04n3030 prices

  • $14.64-$16.95

specifications pressureswitchiz:

  • brand: Senctrl
  • mpn: Y.6ugl04.n30/30
  • part type: Vacuum Pressure Gauge
  • included components: Pressure Gauge
  • size: 30inhg-0-30psi
  • style: Lower Mount
  • measurement accuracy: /-3-2-3
  • thread type: Npt
  • material: Stainless Steel
  • package dimensions lxwxh: 3.82x2.91x1.54 Inches
  • weight: 0.44 Pounds

seller pressureswitchiz:

  • # reviews: 384
  • city: Phoenix, AZ
  • rating: 99.7%

offer pressureswitchiz:

  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 3
  • started: April 20, 2026

payments pressureswitchiz:

  • credit card: Mastercard
  • other
  • wallet: Apple-pay

shipping pressureswitchiz:

  • service: UPS Next Day Air
  • carrier: UPS
  • cost: $0.00
  • class: One-day
  • type: Fixed
  • transit: 4-4 Days

returns pressureswitchiz:

  • policy: Returns Accepted
  • paid by: Seller
  • time: 30 Days
  • method: Money back

general pressureswitchiz:

  • condition: New
  • Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Air Pressure Gauges
part type: vacuum pressure gauge, included components: pressure gauge, size: 30inhg-0-30psi, style: lower mount, measurement accuracy: /-3-2-3, thread type: npt, package dimensions lxwxh: 3.82x2.91x1.54 inches,
category: business & industrial > hydraulics, pneumatics, pumps plumbing > air pressure gauges, weight: 0.44 pounds, material: stainless steel, sku: 18178507095319983,
Senctrl Y.6UGL04.N30-30 Is Similar To:
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2 offers $14.64–$16.95 USD
  • New. Offer #1 priced at $14.64 + $0.00 shipping estimate = $14.64* total. Compatible with air conditioning line repair, tank, HVAC tools, air pump, pipe, tube vacuum test, etc. The circular dial is enclosed in a 304 stainless steel case for corrosion resistance.FREE SHIPPING
  • New. Offer #2 priced at $16.95 + $0.00 shipping estimate = $16.95* total. Glycerine filled provides superior resistance to shock, vibration and pulsation; extends product life and reduces maintenance costs.FREE SHIPPING

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