StoneL Quartz Maxx-Guard Valve Monitor QN2GC02NRA QN2GC03NRA QN2GD05NRA QN2GD06NRA QN2HC02NRA QN2HC03NRA QN2HD05NRA QN2HD06NRA

StoneL QN2GC02NRA is a Quartz Maxx-Guard Low Current Valve Monitor designed for position feedback on compatible automated valves. This product listing combines eight StoneL Quartz QN models in one variable product, covering both low-current SPDT switching and 3A SPDT switching configurations. The available references are QN2GC02NRA, QN2GC03NRA, QN2GD05NRA, QN2GD06NRA, QN2HC02NRA, QN2HC03NRA, QN2HD05NRA and QN2HD06NRA.

StoneL Quartz valve monitors help industrial control systems determine whether automated valves have reached their intended positions. The Maxx-Guard family uses sealed reed-based switching technology and is available in different electrical configurations. Selecting the correct model requires matching the switch type, electrical load, conduit arrangement and mounting requirements of the installation.

StoneL QN2GC02NRA Quartz Maxx-Guard Valve Monitor Overview

The Quartz QN platform is part of StoneL’s industrial valve monitoring portfolio. These devices are typically mounted on compatible pneumatic actuator assemblies to provide discrete feedback for process control and plant automation systems. Valve position information allows control equipment to identify operating states and support maintenance diagnostics.

The QN2G configuration contains two SPDT Maxx-Guard low-current switches. By comparison, QN2H uses two SPDT Maxx-Guard switches intended for applications with different electrical load requirements. Although both configurations belong to the same Quartz family, their electrical characteristics are not identical.

Each ordering reference also identifies mechanical and visual indication options. Consequently, a correct replacement should match the complete original model number rather than only the first four characters.

Available StoneL Quartz QN2G and QN2H Models

Eight ordering references are available in this product group. The QN2G models are intended for low-current switching applications, while the QN2H models use the 3A Maxx-Guard switching configuration.

All listed models use the QN enclosure family and NRA visual indication arrangement. Exact approvals and environmental limits must be checked against the applicable manufacturer documentation and product nameplate.

Technical Specifications

Technical note: Ratings are taken from the manufacturer’s Maxx-Guard switch information. Maximum current, voltage and power limits are separate constraints and must not be combined without checking the actual load conditions. The H-type switch also has a minimum load requirement.

Features and Benefits

Dual SPDT Position Feedback

Both QN2G and QN2H configurations use two SPDT Maxx-Guard switching elements. This arrangement supports discrete feedback from compatible automated valve assemblies. It can be used to identify valve travel endpoints when correctly installed and adjusted.

Electrical Configuration Options

The low-current QN2G family is suited to compatible control input applications. The QN2H family provides a different switch configuration for applications requiring the manufacturer’s specified higher switching capacity. Electrical load compatibility must be verified before ordering.

Visible Valve Position Indication

The NRA ordering configuration identifies an extended visual indicator with red closed and green open indication. This helps personnel recognize valve position locally without relying exclusively on the control room display.

Multiple Connection Arrangements

The product family includes both NPT and metric conduit entry configurations. C02 and C03 variants use NPT connections, while D05 and D06 variants use M20 connections. This provides options for different installation standards.

Industrial Applications

StoneL Quartz Maxx-Guard valve monitors are relevant to industrial process automation systems that require discrete valve position feedback. Common application environments include oil and gas, chemical processing, petrochemical plants, power generation, pulp and paper, water treatment and industrial utilities.

They may be installed on compatible quarter-turn valve actuator assemblies as part of an automated valve package. However, actuator mounting hardware, coupling requirements and electrical compatibility must be verified for the particular installation.

Hazardous-area use requires additional review of the complete device approval and installation conditions. A QN family designation alone does not establish suitability for every classified location.

StoneL QN2G and QN2H Model Selection Guide

Step 1: Check the switch type. Select QN2G for the appropriate low-current switching requirement or QN2H when the application requires the specified 3A Maxx-Guard configuration. Do not substitute these types solely because the enclosures look similar.

Step 2: Confirm the conduit entries. Choose C02, C03, D05 or D06 according to the actual cable entry arrangement and applicable installation standards.

Step 3: Verify the visual indicator. Confirm that the extended red-closed and green-open indicator matches the required valve position display.

Step 4: Compare the existing model number. For maintenance replacements, record the complete StoneL reference from the original nameplate. A clear photograph can help prevent ordering errors.

Step 5: Check site and electrical requirements. Review the manufacturer documentation for switch loads, mounting hardware, enclosure suitability and any required approvals.

Step 6: Request a quotation. Provide the model number, quantity, destination country and requested delivery schedule to confirm current sourcing options.

Why Choose Wuhan Yuli Automation?

Wuhan Yuli Automation Technology Co., Ltd. supplies industrial automation components for customers worldwide. Our product range includes StoneL valve monitors, valve positioners, controllers, communication equipment, power supplies and related industrial components.

We focus on new and original products and offer at least a one-year warranty under our standard sales commitment. Our team can assist with part-number identification, sourcing inquiries, quotation preparation and international order coordination.

Explore our industrial automation brands or view a related StoneL Eclipse valve position monitor.

For manufacturer information, visit the official StoneL Quartz product page and review the official Quartz ordering brochure.

Frequently Asked Questions

What is StoneL QN2GC02NRA?

It is a Quartz Maxx-Guard valve monitor with two low-current SPDT switching elements, a C02 conduit configuration and extended red-closed/green-open visual indication.

What is the difference between QN2G and QN2H?

QN2G uses low-current Maxx-Guard switches, while QN2H uses the 3A Maxx-Guard switch configuration. Their electrical load requirements are different.

What is the difference between QN2GC02NRA and QN2GC03NRA?

Both use the low-current switch family, but their conduit entry arrangements differ. C02 has two entries, while C03 has three entries according to the manufacturer’s ordering guide.

Are QN2GD05NRA and QN2GD06NRA interchangeable?

Not automatically. They use different numbers of M20 conduit entries. The installation requirements must be checked before substitution.

Can QN2HC02NRA replace QN2GC02NRA?

Only after engineering verification. The QN2H and QN2G switch technologies have different electrical characteristics and should not be treated as direct equivalents.

How can I order a StoneL Quartz Maxx-Guard monitor?

Contact Wuhan Yuli Automation with the full model number, quantity and shipping destination. Our team can assist with model verification and quotation requests.