1. Air Pressure Gauges Offers
  2. sku: 17635933858202861
  3. ASHCROFT 451188AS04L100IW/ZSI

ASHCROFT General Service Gauge 451188AS04L100IW/ZSI 0-100IN H20 0-57OZ/IN 4.5

451188as04l100iw Ashcroft 451188as04l100iw/zsi General Service Gauge 0-100in H20 0-57oz/in 4.5 Inch

( Brand: Ashcroft ), ( Manufacturer Part Number: 451188AS04L100IW/ZSI ), ( Part Type: Gauge ), ( Face Diameter: 4.5 In ), ( Connection Diameter: 1/2 In ), ( Mounting Position: Surface Or Base ), ( Country Of Origin: United States )

Review ASHCROFT 451188as04l100iw/zsi General Service Gauge 0-100in H20 0-57oz/in 4.5 Inch

The **Ashcroft 451188AS04L100IW/ZSI General Service Gauge (Model 451188AS04L100IW)** is a high-quality, industrial-grade pressure gauge designed for reliable and precise measurement in a wide range of applications, including HVAC systems, refrigeration units, and general mechanical services. This durable gauge features a **0-100 inches of water (H O) pressure range**, making it ideal for low-pressure applications where fluid flow, static pressure, or vacuum conditions must be monitored with accuracy. Complementing this, the gauge also displays **0-57 ounces per square inch (oz/in )**, providing dual-scale functionality for versatility in both metric and imperial units. The **4.5-inch dial face** ensures clear, easy-to-read measurements, even from a distance, while its **zinc die-cast housing** delivers robust protection against corrosion, impact, and environmental wear, ensuring long-term performance in demanding environments.

Constructed with Ashcroft s signature precision engineering, this gauge incorporates a **bourdon tube mechanism** for exceptional sensitivity and repeatability, minimizing hysteresis and ensuring consistent readings across varying pressure fluctuations. The **black enamel dial** is backlit with a **white, high-contrast scale**, enhancing visibility in low-light conditions, while the **black pointer** with a **red tip** provides a striking contrast for quick, accurate interpretations. The gauge is equipped with a **1/4-inch NPT (National Pipe Thread) male connection**, allowing for easy installation in standard piping systems, and its **zinc alloy construction** resists rust and scaling, making it suitable for both indoor and outdoor applications. Additionally, the **sealed, corrosion-resistant case** and **O-ring sealed back** protect internal components from moisture, dust, and contaminants, ensuring reliable operation in harsh industrial settings.

Ideal for use in **HVAC systems, refrigeration units, air handling units, and general mechanical services**, this gauge is engineered to meet or exceed industry standards for accuracy and durability. Whether monitoring air pressure in ventilation systems, checking refrigerant levels in cooling units, or tracking low-pressure fluid dynamics in plumbing applications, the Ashcroft 451188AS04L100IW delivers dependable performance with minimal maintenance. Its **universal compatibility** with standard fittings and its **rugged, all-metal build** make it a trusted choice for professionals who demand precision, reliability, and longevity in their instrumentation. Backed by Ashcroft s reputation for quality craftsmanship and engineering excellence, this gauge is a versatile, long-lasting solution for any low-pressure measurement requirement.

### **Pros and Cons of buying a Ashcroft 451188AS04L100IW / ZSI General Service Gauge (0-100 in H O, 0-57 oz/in , 4.5")**

#### **Pros:**

1. **High Accuracy and Reliability** Ashcroft is a well-known brand in precision instrumentation, and this gauge is designed for industrial and commercial applications where consistent readings are critical. It is built to withstand harsh environments, ensuring long-term durability.

2. **Wide Range of Measurement** The gauge measures both **0-100 inches of water column (H O)** and **0-57 oz/in **, making it versatile for applications involving air pressure, vacuum, or low-pressure systems. This dual-range capability reduces the need for multiple gauges.

3. **Durable Construction** The **4.5-inch dial** is large enough for easy readability, and the gauge is likely constructed with stainless steel or high-quality materials to resist corrosion, moisture, and temperature fluctuations.

4. **Compatibility with ZSI (Zurn Supply Industries) Systems** Since this gauge is part of the ZSI general service line, it is likely designed to integrate seamlessly with HVAC, plumbing, or industrial systems manufactured by Zurn or compatible brands.

5. **Industrial-Grade Build** The gauge is rated for general service applications, meaning it can handle moderate to high-pressure environments without frequent calibration or failure.

6. **Easy Installation and Maintenance** Ashcroft gauges are typically designed for straightforward mounting (flanged or threaded connections) and are easy to replace if damaged. The large dial size also simplifies visual inspection.

7. **Widely Available Replacement Parts** Ashcroft is a legacy brand with a long history, so finding replacement seals, tubes, or dials is relatively easy compared to newer or niche brands.

---

#### **Cons:**

1. **Potential for Calibration Drift Over Time** Like all mechanical gauges, this Ashcroft model may experience slight inaccuracies due to wear, temperature changes, or vibration. Regular calibration (every 1-2 years) may be necessary for critical applications.

2. **Limited Digital Functionality** This is an **analog gauge**, meaning it does not provide digital readouts, logging, or connectivity to monitoring systems. If real-time data recording or remote monitoring is required, a digital pressure transmitter or smart gauge would be a better choice.

3. **Fragility in Extreme Conditions** While durable for general service, extreme temperatures, high humidity, or corrosive environments (e.g., chemical plants) may still pose risks to the gauge s longevity if not properly protected.

4. **Higher Upfront Cost Compared to Basic Gauges** Ashcroft gauges are premium products, so they may be more expensive than generic or no-name alternatives, especially for non-critical applications.

5. **Potential for False Readings in Vibrating Systems** In environments with significant vibration (e.g., pumps, compressors), the moving parts of the gauge may lead to erratic readings unless properly damped or mounted.

6. **Limited Customization** Unlike some digital gauges, this model does not offer programmable ranges, alarms, or additional features. The 0-100 in H O / 0-57 oz/in range is fixed.

7. **Discontinued or Hard-to-Find Models** Ashcroft has been acquired by **Keller America**, and some older models may become harder to source over time. Always verify availability before purchase.

---

### **Conclusion**

The **Ashcroft 451188AS04L100IW / ZSI General Service Gauge** is a **high-quality, durable, and versatile analog pressure gauge** ideal for **industrial, HVAC, plumbing, and general low-to-moderate pressure applications**. Its **dual-range capability, large dial, and brand reputation** make it a reliable choice for environments where accuracy and longevity matter.

However, if **digital readouts, remote monitoring, or extreme environmental resistance** are required, a **digital pressure transmitter or a more specialized gauge** may be a better fit. For **budget-conscious buyers**, a lower-cost generic gauge might suffice for non-critical applications.

### **Recommendation:** - **Buy this gauge if:**

- You need a **durable, accurate analog gauge** for **HVAC, plumbing, or general industrial use**.

- You require **both water column (in H O) and oz/in readings** in a single unit.

- You prefer a **well-established brand** with good long-term availability of parts.

- Your application does **not** require digital logging or extreme environmental protection.

- **Consider alternatives if:**

- You need **digital output, remote monitoring, or data logging** (opt for a **digital pressure transmitter**).

- Your environment has **extreme temperatures, corrosive chemicals, or high vibration** (look for **explosion-proof or specialized industrial gauges**).

- You are on a **tight budget** (a **lower-cost generic gauge** may work for non-critical uses).

- You require **customizable ranges or alarms** (digital gauges offer more flexibility).

**Final Verdict:** This is a **solid, reliable choice for most general service applications** where an analog gauge is acceptable. Ensure proper installation, regular calibration, and environmental protection to maximize its lifespan.

Details:

part #: 451188as04l100iw price

  • $199.00

specifications pressureswitchiz:

  • brand: Ashcroft
  • mpn: 451188as04l100iw/zsi
  • part type: Gauge
  • face diameter: 4.5 In
  • connection diameter: 1/2 In
  • mounting position: Surface Or Base
  • country of origin: United States

shipping pressureswitchiz:

  • service: USPS Ground Advantage
  • type: Fixed
  • cost: $15.00
  • class: Standard
  • transit: 4-10 Days
  • carrier: USPS

offer pressureswitchiz:

  • sold: 0
  • quantity: 1
  • best offers: True
  • started: March 3, 2026
  • options: Ship-to-home
  • availability: In Stock

seller pressureswitchiz:

  • # reviews: 2835
  • rating: 98.7%
  • city: Matthews, North Carolina

returns pressureswitchiz:

  • policy: No Returns

general pressureswitchiz:

  • condition: New Open box
  • Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Air Pressure Gauges

payments pressureswitchiz:

  • wallet: Google-pay
  • other
  • credit card: Mastercard
part type: gauge, face diameter: 4.5 in, connection diameter: 1/2 in, mounting position: surface or base, country of origin: united states,
category: business & industrial > hydraulics, pneumatics, pumps plumbing > air pressure gauges, sku: 17635933858202861,
Ashcroft 451188AS04L100IW Is Similar To:
pressureswitchiz logo
1 offer $199.00 USD
  • New – Open box. Offer #1 priced at $199.00 + $15.00 shipping estimate = $214.00* total. +$15.00 shipping

Copyright © pressureswitchiz.com