DWYER 161985-00 Magnehelic Mbar Water Pressure Gauge 0-100

( Brand: Dwyer ), ( Manufacturer Part Number: 161985-00 ), ( Part Type: Pressure Gauge ), ( Country Of Origin: United States )

Review DWYER Magnehelic Pressure Gauge 0-100 Mbar

The **Dwyer 161985-00 Magnehelic Pressure Gauge (0-100 mbar)** is a precision-engineered, high-performance instrument designed for accurate and reliable measurement of low-pressure differentials in industrial, HVAC, and laboratory applications. Part of Dwyer s renowned Magnehelic series, this gauge combines durability with unmatched sensitivity, making it an ideal choice for monitoring systems where even the slightest pressure variations demand precise control. Constructed with a robust stainless steel case and a durable, corrosion-resistant housing, the 161985-00 is built to withstand harsh environments, ensuring long-term reliability in demanding settings such as ventilation systems, filtration processes, or pneumatic controls. Its compact yet sturdy design allows for easy installation in tight spaces, while the clear, high-contrast dial face provides instant, legible readings with a range of 0 to 100 millibars (mbar), equivalent to 0 to 0.1 bar or 0 to 1.45 psi. The gauge features a **Magnehelic** mechanism, which eliminates the need for traditional bourdon tubes, instead utilizing a magnetic drive system that delivers smooth, hysteresis-free operation with minimal friction. This innovative design ensures consistent accuracy over time, reducing maintenance requirements and extending the gauge s operational lifespan. The gauge s **0-100 mbar range** makes it particularly suited for applications requiring fine-tuned pressure monitoring, such as airflow balancing in HVAC systems, vacuum testing, or leak detection in sealed environments. Additionally, the gauge s **backlit dial** enhances visibility in low-light conditions, while the **quick-connect fittings** simplify installation and disconnection without tools. Built to meet strict industry standards, including compliance with **ANSI, ISO, and CE regulations**, the Dwyer 161985-00 offers both performance and peace of mind, making it a trusted tool for engineers, technicians, and facility managers who demand precision in their pressure measurements. Whether used in commercial buildings, industrial facilities, or research laboratories, this gauge delivers the reliability and accuracy needed to maintain optimal system performance.

The Dwyer 161985-00 Magnehelic pressure gauge (0-100 mbar range) is a popular choice for measuring low-pressure applications, particularly in HVAC, industrial processes, and laboratory settings. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the Dwyer 161985-00 Magnehelic Pressure Gauge**

1. **High Accuracy and Precision**

The Magnehelic gauge uses a magnetic coupling system to transmit pressure readings to a dial, eliminating friction and ensuring consistent accuracy over time. This design reduces wear and tear compared to traditional bourdon tube gauges, maintaining reliable measurements even with frequent use.

2. **Durability and Longevity**

The gauge is built with a robust construction, including a stainless steel or brass housing, making it resistant to corrosion and mechanical stress. The magnetic coupling mechanism is less prone to failure than mechanical linkages, extending the gauge s operational life.

3. **Wide Range of Applications**

- HVAC duct pressure monitoring

- Laboratory and cleanroom environments

- Industrial filtration systems

- Air handling and ventilation systems

- Compressed air systems with low-pressure requirements

The gauge can also be paired with Dwyer s accessories (e.g., transmitters, sensors) for expanded functionality.

4. **Easy Installation and Calibration**

The gauge features standard NPT (National Pipe Thread) connections (typically 1/4" or 1/2"), making installation straightforward. Dwyer provides calibration services, and the gauge can be recalibrated if needed, ensuring long-term reliability.

5. **Low Maintenance**

Because the magnetic coupling eliminates direct mechanical contact between the pressure element and the dial, there is minimal maintenance required. Users typically only need to check for leaks or corrosion periodically.

6. **Compatibility with Dwyer s Ecosystem**

The Magnehelic series integrates well with other Dwyer products, such as electronic transmitters (e.g., 1620 series) or digital indicators. This makes it easier to upgrade to a more advanced monitoring system if needed.

7. **Clear and Legible Dial**

The gauge s dial is large and easy to read, even in low-light conditions. The numbering and markings are typically clear, reducing the chance of misreading.

8. **Cost-Effective for Low-Pressure Applications**

While not the cheapest gauge on the market, its durability and accuracy make it a cost-effective solution for applications where precision matters. It often outperforms cheaper alternatives in terms of longevity.

---

### **Cons of the Dwyer 161985-00 Magnehelic Pressure Gauge**

1. **Limited Pressure Range**

The 0-100 mbar range is narrow and may not be suitable for applications requiring higher or lower pressure measurements. If your system operates outside this range, you would need a different gauge (e.g., Dwyer s 0-250 mbar or 0-1000 mbar models).

2. **Higher Upfront Cost Compared to Basic Gauges**

The Magnehelic gauge is more expensive than standard bourdon tube gauges due to its advanced magnetic coupling technology. For very basic applications, a simpler gauge might suffice at a lower cost.

3. **Potential for Magnetic Coupling Issues**

While rare, the magnetic coupling can sometimes experience misalignment or failure over time, especially if the gauge is subjected to extreme vibrations or improper handling. This is less common than with mechanical gauges but is still a consideration.

4. **Limited Customization**

The gauge s design is standardized, and customization options (e.g., special dial markings, materials) are limited compared to some industrial gauges. If you need non-standard features, you may require additional accessories or modifications.

5. **Requires Proper Installation for Accuracy**

Like all pressure gauges, the Magnehelic gauge must be installed correctly to avoid errors. Improper installation (e.g., incorrect orientation, lack of isolation) can lead to inaccurate readings or damage. Users must ensure the gauge is installed in a location free from extreme temperatures or vibrations.

6. **No Built-In Data Logging**

The gauge itself does not log data; it provides a real-time reading. For applications requiring historical data, you would need to pair it with a data logger or electronic transmitter.

7. **Potential for Condensation or Moisture Issues**

In humid environments, condensation can form inside the gauge housing, affecting accuracy. While the Magnehelic is generally resistant, users in high-humidity settings may need to add desiccants or ensure proper drainage.

8. **Not Ideal for High-Temperature Applications**

The gauge is typically rated for moderate temperature ranges (e.g., -20 C to 80 C or 32 F to 176 F, depending on the model). For extreme temperatures, a specialized gauge would be required.

---

### **Conclusion**

The Dwyer 161985-00 Magnehelic pressure gauge is an excellent choice for applications requiring accurate, low-pressure measurements in environments where durability and reliability are critical. Its magnetic coupling design reduces friction and wear, ensuring long-term performance, while its compatibility with Dwyer s ecosystem makes it versatile for both analog and digital monitoring setups.

However, its narrow pressure range, higher cost, and lack of built-in data logging may make it less suitable for applications needing broader pressure ranges or advanced data recording. If your primary concern is cost and your application is straightforward, a basic bourdon tube gauge might be adequate. But if accuracy, longevity, and ease of maintenance are priorities, the Magnehelic gauge is a strong recommendation.

---

### **Recommendation**

- You need precise measurements in the 0-100 mbar range for HVAC, laboratory, or industrial applications.

- Durability and low maintenance are important, and you can justify the higher upfront cost.

- You plan to integrate it with Dwyer s electronic transmitters or other accessories for expanded monitoring.

- Your environment is not subject to extreme temperatures or vibrations that could compromise the gauge s performance.

- Your pressure range exceeds 100 mbar, and you need a gauge with a broader scale (e.g., Dwyer s 0-250 mbar or 0-1000 mbar models).

- Your budget is tight, and a basic bourdon tube gauge would suffice for your application.

- You require built-in data logging or advanced features like wireless connectivity, in which case you may need to pair the gauge with a separate data acquisition system.

For most users seeking a reliable, accurate, and long-lasting low-pressure gauge, the Dwyer 161985-00 is a highly recommended purchase. Ensure proper installation and calibration to maximize its performance.

Details:

part #: 16198500 prices

• $24.30-$59.00

specifications pressureswitchiz:

• brand: Dwyer
• mpn: 161985-00
• part type: Pressure Gauge
• country of origin: United States

payments pressureswitchiz:

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

offer pressureswitchiz:

• availability: In Stock
• started: April 8, 2026
• best offers: True
• options: Ship-to-home
• sold: 0

returns pressureswitchiz:

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

shipping pressureswitchiz:

• type: Calculated
• carrier: UPS
• transit: 2-5 Days
• cost: $13.17
• service: UPS Ground, UPS Next Day Air Saver, UPS Next Day Air
• class: Standard, One-day

seller pressureswitchiz:

• city: Middletown, Ohio
• # reviews: 7791
• rating: 99.9%

general pressureswitchiz:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Air Pressure Gauges
• condition: Used

Dwyer 161985-00 Is Similar To:

• 1 Pressure 0-3.7 Nib X8-2 Gauge 0-15 Dwyer 61015 Kpa Water (40% similar) ...(January 31st, 2015)
• 102003-02 Dwyer New Magnehelic Differential Pressure Gage Max Psig (57.6% similar) If you ever have any questions or are unsatisfied, for reason please let us know. Vb industrial supply takes great pride to honestly and accurately describe each item listed. Vb industrial supply offers a huge selection of tools for every trade including new and used electrical, mechanical, ...(March 10th, 2019)
• 12-160537-01 Dwyer Pressure Gauge 0-50 (53.3% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(October 14th, 2017)
• 12-160537-02 Dwyer Pressure Gauge 0-50 (53.3% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(September 15th, 2017)
• 12-16736-01 Dwyer Pressure Gauge 30-0-30 (54.3% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(September 16th, 2017)
• 12-167360-01 Dwyer Pressure Gauge 30-0-30 (53.8% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(September 16th, 2017)
• 12-193605-01 Dwyer Pressure Gauge New (47.2% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(December 31st, 2017)
• Differential 1638-0 Switch Pn Pressure Dwyer (50% similar) Low usage in clean factory...(February 2nd, 2015)
• 165955-00 Dwyer Magnehelic Differential Pressure Gauge (58.5% similar) Part: 165955-00 prices...(February 23rd, 2017)
• 1820-2b Pressure 18202b Switch Dwyer (38.6% similar) 64 lb J qty. Remanufactured, rebuilt details selling only what is pictured. Dwyer pressure SWITCH1820 2b condition x new, in box new, no box new, old inventory used, but in good working condition. Let us know what going on and we ll provide you a FedEx account to return product. Return product some ...(February 2nd, 2015)
• Switch 1822-2 Series Pressure 1800 Dwyer (50% similar) B 3/6 bi 18. We combine shipping and handling costs on multiple buys...(May 28th, 2015)