Cornell -SentryGate® Protection Grill


Model Number: ESG20 and ESG21

Commercial Security Grilles

Our most secure grille in the product line up, the SentryGate’s® patented design is an alternative to traditional rolling or counter grilles.

Category: egress grilles | emergency grilles | emergency response grilles...

MasterFormat: Metal Doors and Frames | Specialty Doors and Frames | Coiling Doors and Grilles...

24 Elmwood Avenue
Mountain Top, PA 18707
Tel: (800) 233-8366
Fax: (800) 526-0841

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SentryGate® Protection Grill

Model Number: ESG20 and ESG21

Commercial Security Grilles

Our most secure grille in the product line up, the SentryGate’s® patented design is an alternative to traditional rolling or counter grilles. Featuring a unique curtain comprised of injection molded components and continuous metal rods, the SentryGate® provides the ultimate protection to a parking garage entrance, in front or behind a glass storefront or closed pharmacy counter.

The SentryGate’s patented design is an aesthetic alternative to traditional rolling or counter grilles and is available in white or black. The custom gate’s contoured curtain profile allows the unit to tightly store in an overhead coil. Also available in a compact model, the compact unit is installed in spaces where a rolling counter door would be used, such as pharmacy or concession counter openings. The full sized commercial security gate unit is typically used for full sized or very wide openings.

When you need a security grille that is heavy on security, light on weight, the SentryGate® has an efficient design that allows for interior mounting to existing construction.


The SentryGate® combines high strength injection molded components with continuous metal rods. Its attractive brick pattern design is 65% open-air, for high visibility and ventilation. Our grille can be operated manually as a push-up or with a hand crank. If a motor is required, a standard motor, or compact integrated tube motor is available - key when headroom or aesthetics are of importance.

The SentryGate® provides:

  • Ultimate security protection

  • Easy retro-fitting to existing structures: The unit can bolt directly to existing wall constructions, frames or mullions, without the penalty of remodel downtime and cost

  • Up to 5” less headroom than traditional rolling grilles for some designs

  • Rugged curtain construction: SentryGate® curtains will maintain structural integrity and clean look, even with high cycle use

  • Little or no routine maintenance


Compact model (ESG 20) for openings 2’ wide by 1’6” high up to 14' wide by 10' high.

Standard model (ESG 21) for all other openings up to 23' 4" wide by 14' high, or smaller doors which have high cycle requirements

Additional information:

If between jambs guide mounting is selected, minimum width is 2'11", minimum height is 2'7" high.
Maximum size for push up operation is 8' wide x 8' high.
Self supporting tubes only available with a face of wall mounting.


The doors are constructed for daily use and can withstand operation of up to 20 cycles per day - that’s 50,000 cycles for the lifetime of the door.

If your requirements call for more than this, upgrade to the 100,000 cycle Extreme SentryGate® Grill option (See Options Tab).

Standard Materials and Finishes

The SentryGate® combines high strength injection molded components with continuous metal rods spaced every two inches. The smooth finish is available in a black or white matte.

Surrounding components are clear anodized aluminum as standard. Optional finishes are black anodized or selected color powder coat finish.

Available Operators

Our doors can open by motor, hand-crank, or push-up operation, depending on size, weight and/or frequency of operation.

Model MG - A medium duty operator for doors that will cycle no more than 20 times per day

Model SG - A super duty, full logic operator for larger doors or doors which may periodically cycle more than 20 times per day (used with Extreme® option).

Tube Motor - If aesthetics or strict dimensional limitations around the header are key, our concealed tube motor is a much smaller operator - and available only with the compact model


Chain Diverter for MGH Operators

This option moves the auxiliary chain out of the clear opening and to the side of the door - enabling free movement through the door and making a chain bag unnecessary.

Fixed Panels

Grille curtain can be mounted in a fixed frame assembly. It can be installed separately, or installed near a rolling grille curtain to complement the aesthetics. Often used in parking garages.

Hood and Operator Covers

Metal cover to protect the coil or operator from exterior weather, debris or to meet OSHA or UL 325 safety requirements.

Powder Coating Grilles

Powder coat finish in more than 180 colors is available on perimeter components such as the aluminum bottom bar, hoods, wall angles, tubes and fascia. This finish is not available on the grille curtain.

Trim Package

In applications where exterior aesthetics are important, such as hotels, condominiums, convention centers and parking garages, the addition of a trim package can cover unsightly hardware and contribute to the building's architecture.

Performance Upgrades

Grille High Cycle Construction

For grilles that will cycle more than 5 times per day, such as parking garages and sally port openings, we recommend Model ESG12 brick pattern configuration. Alternative high cycle options include the Extreme SentryGate® grille and the Extreme 324 Grille.

Safety and Protection

Entrapment Protection Devices

Entrapment protection devices ensure that a motorized door or grille will not close on an object. If an object enters path of closure, the entrapment protection device will stop the door or grille from closing and return it to the fully open position.

Guide-Mounted Interlocks

An electrical cutout switch to prevent motor operation if locking device is not first disengaged.


A wide variety of locking options are available to meet your security needs.

Motor Mounted Interlock

An overload sensing device that prevents damage if motor operation is attempted when the door or grille is locked. Field wired guide mounted interlocks are no longer necessary.

Manual Release System

If egress is required on a motorized grille, a wall mounted pull handle disengages the motor to allow the grill to partially open.

Unique Design Solutions


Countertops are available for a complete counter shutter closure solution, and can be UL rated.


There are multiple mullion options - corner, fixed and removable.

Sloping or Irregular Openings

Our special bottom bar designs can address these conditions.

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