Stonel™ Quartz™ limit switch

Features

Wide variety of switching & communication options including solid state proximity and mechanical switches as well as communication and 4-20mA continuous outputs.
Enclosures optimized for tough process environments
Rapid enclosure access
Quick set cams
Extremely compact with space saving visual indication
Dual shaft o-ring seals
The oil impregnated bronze bushing maintains smooth operation and eliminates the potential for shaft seizure due to actuator shaft eccentricity.
Top inner and bottom outer shaft o-rings seal the drive bushing from both external corrosives and internal contaminants

Applications

Automated On/Off valve applications in hazardous process environments
Corrosive and wash down process environment
Food and beverage
Chemical process
Pharmaceutical and biotech
Agri-processing
Oil and gas
Marine and offshore

For the most challenging environments

The explosionproof Quartz for process valve monitoring is available with a 316 stainless steel enclosure that is extremely durable and well-suited for use in corrosive, heavy washdown and high seas environments. A broad range of switching, position transmitters and communication options may be selected to accommodate most applications. You can attach the Quartz to quarter-turn actuators, manual operators, linear operators, and positioners using readily available stainless steel mounting systems.

Monitor an automated on/off valve in all process areas

The Quartz monitors and reports valve position with visual indicator and signals to the controller.

Specifications

QX35 / QN35:	Universal voltage switching and solenoid termination
QX45 / QN45:	Namur sensors (7-24 VDC)
Communication options:	AS-Interface and DeviceNet
Temperature range:	-55 °C … +80 °C / -67 °F … +176 °F
Material:	Epoxy coated anodized aluminum, optional polycarbonate cover
Hazardous area approvals:	Ex d Ex i, Class I, Division 1 and Class I, Division 2 see Approvals tab

Downloads
Quartz brochure (Stonel branded)	Quartz brochure (Stonel branded), Spanish	Installation manuals
Bench test diagram	Quartz dimensional Drawing short visual indicator (S)	Quartz dimensional Drawing extended visual indicator (N)
Quartz dimensional drawing ext indicator H shaft (H)	DeviceNet .eds files	FOUNDATION Fieldbus DD Files
Quartz stp file	Visual indication option chart (Stonel branded)	Visual indication option chart (Neles branded)

1. Enclosures optimized for environment Available in three enclosure styles suitable for use in various process environment areas.
2. Rapid enclosure access Screw-on cover allows quick enclosure access, saving you valuable maintenance and set-up time. The cover provides a vapor tight seal and allows entry to internal components in less than five seconds.
3. Faster wiring Pre-wired and labeled terminal strip enables quick, convenient attachment of field wires.
4. Wide variety of switching & communication Switching options include dual module sensors and communication, Maxx-Guard proximity switches, and mechanical switches. Continuous signal output is available in a 4 to 20 mA position transmitter.
5. Quick set cams are easy to adjust Touch and tune switch settings allow you to make adjustments in seconds without the use of tools.
6. Dual shaft o-ring seals eliminate corrosion Top inner and bottom outer shaft o-rings seal the drive bushing from both external corrosives and internal contaminants that enter the enclosure.
7. Special drive bushing assures long cycle life The oil impregnated bronze bushing maintains smooth operation and eliminates the potential for shaft seizure due to actuator shaft eccentricity.
8. Space saving visual indication Visual indicator offers excellent view ability without sacrificing accessibility or adding to space requirements. Indicators are also available with continuous percentage or three-way indication.

QX: Explosion-proof, water tight and corrosion-resistant enclosure is approved for use in div.1/zone 1 hazardous areas. Available options include stainless steel and epoxy-coated anodized aluminum.

QN: Nonincendive is approved for all div.2/zone 2 hazardous environments with proximity sensors using a clear cover. Intrinsically safe Namur sensors or passive switches are available for div.1/zone 0 applications.

QC: Explosion-proof, water tight and rated for low temps ( -55C ) Enclosure is approved for use in div.1/zone 1 hazardous areas. Available options include stainless steel and epoxy-coated anodized aluminum.

QG: General purpose features a clear Lexan cover with mechanical switches. All enclosures are rated NEMA 4, 4x, and 6.

Wide variety of switch/sensor functions

A wide variety of switch/sensor communications and position transmitters may be selected for the Quartz series. Options include 2, 4 or 6 mechanical or proximity switches, position transmitters with or without switches, and the Stonel dual module with two SST or two Namur sensors or AS-Interface or DeviceNet communication capabilities.

Speed installation with LED indication

Stonel visual indicator and LEDs give you an extra measure of safety and increased convenience during plant start-up and operation. Green visual indication and green LED means the valve is open and the computer circuit is properly operating. Red visual indication and red LED means the valve is closed and the computer is properly matched. All systems are functioning properly

Quartz Stonel model selection guide, QX

Quartz Neles model selection guide, QX (discontinued)

Quartz Stonel model selection guide, QN

Quartz Neles model selection guide, QN (discontinued)

Quartz Stonel model selection guide, QC

Quartz Neles model selection guide, QC (discontinued)

Quartz Stonel model selection guide, QG

Quartz Neles model selection guide, QG (discontinued)

Go to Approvals page

1. Enclosures optimized for environment Available in three enclosure styles suitable for use in various process environment areas.
2. Rapid enclosure access Screw-on cover allows quick enclosure access, saving you valuable maintenance and set-up time. The cover provides a vapor tight seal and allows entry to internal components in less than five seconds.
3. Faster wiring Pre-wired and labeled terminal strip enables quick, convenient attachment of field wires.
4. Wide variety of switching & communication Switching options include dual module sensors and communication, Maxx-Guard proximity switches, and mechanical switches. Continuous signal output is available in a 4 to 20 mA position transmitter.
5. Quick set cams are easy to adjust Touch and tune switch settings allow you to make adjustments in seconds without the use of tools.
6. Dual shaft o-ring seals eliminate corrosion Top inner and bottom outer shaft o-rings seal the drive bushing from both external corrosives and internal contaminants that enter the enclosure.
7. Special drive bushing assures long cycle life The oil impregnated bronze bushing maintains smooth operation and eliminates the potential for shaft seizure due to actuator shaft eccentricity.
8. Space saving visual indication Visual indicator offers excellent view ability without sacrificing accessibility or adding to space requirements. Indicators are also available with continuous percentage or three-way indication.