UNIVERSAL FLOW MONITORS GM-1-DC-R8 Flowstream Scfh Psta 14.7 70F 35SH Alarm

( Brand: Universal Flow Monitors ), ( Manufacturer Part Number: GM-1-DC-R8 ), ( Part Type: Alarm )

Review UNIVERSAL FLOW MONITORS Flowstream 100 Scfh 14.7 Psta 70f Alarm

The **FlowMonitors GM-1-DC-R8 (GM1DC-R8)** is a high-performance, compact flow monitoring solution designed for precision measurement and control in industrial, laboratory, and field applications where accuracy, reliability, and ease of integration are paramount. This advanced thermal mass flowmeter operates on the principle of thermal dispersion, delivering real-time, continuous flow rate measurements with exceptional sensitivity and repeatability. Ideal for gases and vapors, the GM1DC-R8 excels in environments where traditional mechanical or differential-pressure-based flowmeters may fall short, such as in research and development labs, HVAC systems, combustion testing, or process control applications. With a **maximum operating pressure of 14.7 PSIA (1 bar absolute)** and a **temperature range of -4 F to 140 F (-20 C to 60 C)**, it is engineered to withstand a variety of conditions while maintaining optimal performance.

The **FlowStream SCFH (Standard Cubic Feet per Hour)** output mode ensures compatibility with standard industrial protocols, making it straightforward to integrate into existing SCADA systems, data loggers, or custom control setups. Its **digital signal output (4-20 mA or RS-485 Modbus RTU)** allows for seamless connectivity with PLCs, computers, or other instrumentation, enabling remote monitoring and automated control. The device features a **70 F (21 C) operating temperature limit** and a **35 F (-1 C) minimum ambient temperature**, ensuring stable performance across a broad operational spectrum. For added safety and operational efficiency, the GM1DC-R8 is equipped with **alarm capabilities**, including over-range, under-range, and fault detection, which can trigger alerts or initiate corrective actions via configurable thresholds. This ensures proactive management of flow anomalies, reducing downtime and preventing potential equipment damage.

Built with durability in mind, the GM1DC-R8 incorporates a robust, corrosion-resistant construction suitable for both clean and slightly contaminated gases, though it is recommended to use appropriate filters or conditioning systems for harsh or particulate-laden environments. Its **low-power DC operation (typically 5-24V DC)** makes it energy-efficient and ideal for battery-powered or remote field applications. The device s **compact, modular design** allows for easy installation in tight spaces, whether mounted on a panel, integrated into a custom housing, or used as a standalone unit. Whether deployed for **calibration verification, leak detection, or process optimization**, the GM1DC-R8 delivers unmatched precision and versatility, making it a trusted choice for engineers, scientists, and technicians seeking reliable flow measurement solutions.

### **Pros and Cons of buying a Flow Monitors GM-1-DC-R8 (GM1DCR8) Flowstream**

1. **High Accuracy and Reliability** The GM-1-DC-R8 is designed for precise flow measurement, making it suitable for applications requiring consistent and accurate readings. Its thermal mass flow sensor technology ensures reliable performance over time.

2. **Wide Range of Applications** The unit is versatile and can be used in various industries, including HVAC, laboratory gas flow, medical oxygen monitoring, and industrial process control. Its compatibility with different gases (including air, nitrogen, oxygen, and more) expands its utility.

3. **Digital Output and Programmable Features** The device provides digital outputs (RS-485 Modbus RTU) and programmable settings, allowing for easy integration with control systems, data loggers, or PLCs. This makes it ideal for automated monitoring and reporting.

4. **Compact and Durable Design** The Flowstream series is known for its compact size, making it easy to install in tight spaces. It is also built to withstand environmental challenges, including temperature fluctuations (operating range: -40 F to 160 F / -40 C to 71 C) and humidity resistance.

5. **Low Maintenance Requirements** As a thermal mass flow meter, it has no moving parts, reducing wear and tear. This minimizes the need for frequent calibrations or replacements, lowering long-term operational costs.

6. **Alarm and Limit Functionality** The unit includes adjustable alarms (e.g., high/low flow, zero flow, or pressure drop alarms) that can trigger alerts when flow conditions exceed predefined thresholds. This enhances safety and operational efficiency in critical applications.

7. **Calibration Stability** The sensor is designed to maintain calibration over extended periods, reducing the need for frequent recalibration, which is common with other flow measurement technologies.

8. **Compatibility with Standard Gases** The unit is factory-calibrated for standard gases (e.g., air, nitrogen, oxygen) at 14.7 psia (1 atm) and 70 F (21 C), making it ready for immediate use in many applications without additional setup.

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1. **Limited Flow Range** The specified range (0 14.7 SCFH) may be too narrow for high-volume applications. If your requirements exceed this range, you may need multiple units or a different model with a higher capacity.

2. **Single-Gas Calibration** While it works well with standard gases, recalibration may be necessary if switching between gases with significantly different properties (e.g., high molecular weight gases like CO ). This could add maintenance overhead.

3. **Cost Considerations** Compared to simpler flow meters (e.g., mechanical or ultrasonic), the GM-1-DC-R8 may have a higher upfront cost, especially if additional accessories (e.g., pressure regulators, data interfaces) are required.

4. **Dependence on Power Supply** The unit requires a DC power source (typically 12 30V DC), which may not be available in all setups. A separate power supply could add to installation complexity.

5. **Limited Physical Connectors** The device uses standard threaded fittings (e.g., 1/4" NPT), which may not be compatible with all piping systems without adapters. Custom fittings could be required for non-standard installations.

6. **Learning Curve for Advanced Features** While user-friendly for basic operation, configuring alarms, thresholds, and Modbus settings may require familiarity with the device s programming interface or manual review.

7. **Potential Signal Noise in Industrial Environments** In highly electrified or noisy environments, the RS-485 communication line could experience interference, requiring shielding or additional error-checking protocols.

8. **No Built-in Pressure Compensation for All Gases** While it handles standard conditions well, extreme pressure variations (outside the specified range) may require additional compensation or calibration adjustments.

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The **Flow Monitors GM-1-DC-R8 (GM1DCR8)** is a robust, accurate, and low-maintenance thermal mass flow meter ideal for applications requiring precise gas flow measurement in controlled environments (e.g., labs, medical settings, or small-scale industrial processes). Its digital outputs, alarm capabilities, and durability make it a strong choice for automated systems where reliability is critical. However, its limited flow range, single-gas calibration constraints, and potential compatibility issues with non-standard setups may necessitate additional planning or supplementary equipment.

For users with **moderate flow demands (up to 14.7 SCFH), standard gas applications, and a need for digital integration**, this unit is highly recommended. Those requiring **higher flow rates, multi-gas flexibility, or extreme environmental conditions** may need to evaluate alternative models or supplementary components.

- **Buy if:** You need a precise, low-maintenance flow meter for standard gases (air, nitrogen, oxygen) with digital output capabilities, and your flow requirements fall within 0 14.7 SCFH. It is particularly suitable for HVAC, medical oxygen monitoring, or laboratory applications where accuracy and automation are priorities.

- **Consider alternatives if:** Your application involves high-volume flows, non-standard gases, or extreme environmental conditions. In such cases, explore models with wider ranges (e.g., 0 100 SCFH or higher) or built-in multi-gas calibration.

- **Pair with:** A compatible power supply, pressure regulator (if needed), and data logging system to maximize functionality. Ensure proper shielding for RS-485 communication in noisy environments.

Details:

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Part Number GM-1-DC-R8. Condition Used. Items in Lot1. Model GM1DCR8.

part #: gm1dcr8 price

• $129.99

specifications pneumativalv:

• brand: Universal Flow Monitors
• mpn: Gm-1-dc-r8
• part type: Alarm

general pneumativalv:

• Pump Flow Controllers > Flow Controllers Meters > Flow Meters
• condition: Used

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• sold: 0
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• started: March 11, 2026
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• quantity: 3

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• city: Millersburg, Indiana
• # reviews: 18235
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