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120 V 2625-54B-SS 70757 $9541-3 Days2
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240 V 2625-54B-SS-220 70989 $9541-3 Days3
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Product Details

• Filter replacement alarm keeps your fan filter units working safely and efficiently

• 1 Filter Replacement Alarm unit covers for all FFUs in your cleanroom

• Receive automatic replacement alerts to avoid costly and unexpected operational interruptions

• Prevent electrical/fire hazards caused by overworked motors pushing against overloaded HEPA filters

• Control differential pressure set-point to adjust frequency of filter replacement

• "Includes audible buzzer with silencer that sounds when set point level is exceeded

• Factory set to issue a warning alarm when pressure reaches twice the initial backpressure (typically 1.5"" WC), indicating need for filter replacement (adjustable 0.5"" - 2"" WC)

• Alarm unit connects to one FFU equipped via challenge port and signals when all filters are ready to be replaced

• TUI Logo flashes when the HEPA or ULPA filter needs to be replaced

• Integrated Minihelic gauge displays the backpressure within the fan/filter unit

• Monitoring system’s control box is typically mounted above the cleanroom control panel

• Module draws power from the cleanroom PDM or can be connected to a standard 120V outlet (order power outlet cord adapter separately)"

Unit of Measure: of 1

  • Cleanroom HEPA or ULPA Fan Filter Unit WhisperFlow Cleanroom HEPA Fan Filter Unit
  • Stainless Steel WhisperFlow Fan and Filter Units Stainless Steel WhisperFlow Fan and Filter Units, 2' x 4'
  • EC HEPA Fan Filter Unit Smart WhisperFlow Fan Filter Unit with EC Motor
  • Room Side Replaceable Fan Filter Units (FFUs) Room Side Replaceable WhisperFlow® Fan Filter Units (FFUs)
  • Explosion-Proof Softwall Cleanroom Explosion-Proof Softwall Cleanroom
  • 2' x 4' Ducted HEPA Filter Unit Ducted HEPA Filter Unit, 2' x 4'
Cleanroom HEPA or ULPA Fan Filter Unit
Stainless Steel WhisperFlow Fan and Filter Units
EC HEPA Fan Filter Unit
Room Side Replaceable Fan Filter Units (FFUs)
Explosion-Proof Softwall Cleanroom
2' x 4' Ducted HEPA Filter Unit

Features & Benefits

Features and Benefits

Filter Replacement Alarm System

Filter Replacement Alarm System

  • Keep your fan/filter units working efficiently
  • Receive automated filter replacement alerts
  • Prevent electrical or fire hazards
  • Control filter set-point
  • Plan ahead to avoid operational interruptions

Knowing when to replace a HEPA or ULPA filter can be challenging. Terra's Filter Replacement Alarm can help! The module monitors the back-pressure of the filter and alerts cleanroom personnel when replacement is needed.

FFU motor damage may occur from over-work due to building pressure, and even lead to electrical failure or dangerous fire hazards. Filter replacement is much more economical than FFU replacement or room rewire, and doesn't require time-consuming operational shutdown.

How does it work? Pressure within the space between the blower and the filter will increase over time as more and more particles accumulate in the filter. The system's Photohelic® gauge features two manually adjustable needles that are used to mark the original backpressure reading and the maximum acceptable level (typically double the backpressure reading of a new filter).

The gauge connects to the nearest fan/filter unit (FFU) equipped with a Challenge Port (Part #6601-99) and displays the backpressure created within the FFU. An LED indicator light above the gauge will flash, and a buzzer will sound, when the pressure exceeds this set limit. Personnel are then notified that the room's HEPA or ULPA filters should be replaced. An override switch silences the buzzer, but the light continues to flash until the filter is replaced.

Long Running FFU Motors

Terra’s filter fan unit motors are rated for 5 years of continuous, 24/7 operation, if the HEPA filters are consistently replaced. To accurately monitor your HEPA filter’s saturation levels, purchase Terra’s audible and visual filter replacement alarm system.

Continuous Product Improvement

At Terra, we strive to develop and produce the highest quality products for our customers to improve health, safety, performance, and yields. We accomplish this by harnessing high-grade manufacturing equipment and processes, 45 years of engineering and application expertise, and our will to continuously improve.

Available Accessories

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Power Distribution Modules for Cleanroom FFUs and Lights
    UL-listed power distribution modules include all breakers, transformers and other electrical components for FFU/light connections; allows fast addition or relocation of FFUs or lights without the need for rewiring.
  • Ionizing Bar; 22"L, with Installation Kit, for 24 x 24 Fan/Filter Unit
    Ionizing bar, mounted to Fan/Filter Unit, provides a balanced stream of ions to the work area below to neutralize static charge and prevent electro-static discharge; 22" bar shown installed on 2' x 2' FFU.
  • Night Service Saves Energy, Extends Filter Life!
    Night service switch, shown mounted on Modular Hardwall Cleanroom panel, puts FFUs in low-energy mode during off-hours; saves 25% of fan operating costs and extends filter life.
  • Filter Replacement Alarm
    The filter replacement alarm monitors filter backpressure and issues an alarm when filter needs replaced (requires selection of fan filter unit with challenge port, order separately).
  • Cord Adapter, MIN4 PL to 16AWG Power Cord for Terra Fan/Filter Unit
    Four-pin power cord adapter for fan/filter unit allows connection to standard 120VAC/60Hz power receptacle.
  • FFU Mounting Frame; Stainless Steel
    Stainless steel Fan Filter Unit (FFU) mounting frame supports FFU on drywall or other rigid ceiling material, viewed from above ceiling panel (FFU not included).
  • Fan Filter Unit Control System
    Provides room-by-room monitoring and control of Smart WhisperFlow FFUs to maintain target pressure differentials for ISO classification; temperature, humidity and particle monitoring and data logging, as well as dynamic fan set-point control, also available.
  • Filter Covers Allow Ceiling Wash-Down
    Ceiling panel covers allow wash-down and sterilization of cleanroom walls and ceilings without damage to filter medium; requires BioSafe glass or stainless steel wall panels, which stand up to biocides.
  • Challenge Port for Fan Filter Unit
    Challenge port for Fan/Filter Units simplifies filter leak testing and connection of Filter Backpressure Alarm (shown with optional pressure gauge; must be ordered with FFU).
  • Safely Mount FFU’s Above Floor for Horizontal Laminar Airflow
    The portable FFU base stand can be easily positioned to supply Class 100 horizontal laminar flow into a room or enclosure. It can also be positioned next to sensitive equipment/materials that are mounted close to the floor.

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