Air Purification Systems for creative Negative Pressure Isolation Rooms
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Room Pressure Monitors
Isolation Room Equipment
Room Pressure Sensor for Patient Care Areas
Monitor Negative Pressure Rooms Positive Pressure Rooms



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Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms Sensors



Meets all CDC Guidlines

 Room pressure sensor

 Accurate to .001” W.G.

 3 Versions

 Status LED

 Large scale display

 User alarm set point

 Audible alarm with mute

 One minute delay

 4/20 MA output available

 Room Pressure Monitor
 negative or positive



Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms Sensors



Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms SensorsACCUSTAT™ Stationary Model

 Room Pressure
 Monitors
 Negative & Postitive
 Pressure Room
 Monitor
 Isolation Room
 Equipment





The ACCUSTAT™ room pressure monitor is designed specifically for monitoring low negative or positive pressure differentials. Accurate pressurization is a vital step in creating a compliant controlled and safe environment. Ideally suited for monitoring hospital isolation rooms or pressure differentials in other critical applications.

Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms SensorsState-of-the-art microprocessor design operates from a single positive supply power source. Temperature compensation provides for consistent predictable performance within specified temperature ranges. Pressure readings are instantaneous and accurate with many optional features to allow for custom designed installations.

State-of-the-Art Solid-State Circuitry

 Room Pressure Monitor
 Negative Pressure Isolation Room Monitors
 Positive Pressure Isolation Room Monitors
 Isolation Room Equipment

Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms Sensors
View of internal printed circuit board.
A large lighted digital display readout identifies instantaneous sub-fractional pressure changes when compared to the adjoining areas. Pressure readings are accurate to within .001” WG with audio and visual alarms identifying unsatisfactory conditions. The ACCUSTAT™ utilizes a highly sensitive pressure transducer eliminating the varying inconsistencies of “airflow” monitors. Air pressure tends to be more consistent and less corrupted by airflow direction disruption, thereby reducing the frequency of false alarm and inconsistency.

The need for monitoring pressure differentials between areas has a broad range of applications throughout many critical environments. From the concerns and safety of health care personnel to the protection of processes, products and equipment, maintaining a positive or a negative pressurization environment satisfies industry compliance. ACCUSTAT™ pressure monitoring capabilities include:

For Negative Pressure
Autopsy Room, Body Holding Room, Laboratory, Isolation Rooms, Decontamination Areas, Linen Sorting, ETO Sterilizer Room, Soiled Utility Rooms, X-Ray.

For Positive Pressure
Clean linen storage, Clean workroom and holding areas, Delivery ICU, Med Rooms, Pharmacy, OR, Nursery, Recovery, Trauma.

Some of these areas need continual monitoring, while others need periodic monitoring. CDC Guidelines for TB Control of 1994 recommend, and OSHA enforces that “TB isolation rooms should be checked daily for negative pressure while being used for TB isolation.” Three different ACCUSTAT™ versions are designed for these varying needs.


Applications


 Hospital Room Isolation

 Medical Labs

 Clean Rooms

 HVAC Systems

 Research Facilities

 Pharmaceutical Manufacturing

 Laboratory Pressurization

 Schools and Universities


Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms Sensors

Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms SensorsACCUSTAT™ P-1 (Portable)

 Portable Room Pressure Monitor
 Negative Pressure Isolation Room Monitors
 Positive Pressure Isolation Room Monitors
 Isolation Room Equipment

When monitoring individual rooms in multiple locations, the ACCUSTAT™
P-1 offers user versatility. The circuitry is identical to the stationary ACCUSTAT™ except for the addition of the built-in rechargeable battery component. The unit can be powered from a standard 115V electrical outlet or by the 19 hour 1500 mAH NiMh battery. The case is durable stainless steel with a vinyl coated fold-down handle. It weighs less than five pounds and includes an extended flexible probe tube. The P-1 is a welcome resource to confirm pressurization anywhere when accuracy and portability are considerations and environments where pressure monitoring is critical. The ACCUSTAT is a pressure sensor. It is sensing through pressure the static differential between the two referenced spaces.. A valuable piece of isolation room equipment. Pressure sensor meeting DCD guidelines for patient care areas.



ACCUSTAT™ BMS –
Building Management System

 Room Pressure Monitor
 Negative Pressure Room Monitors
 Positive Pressure Room Monitors
 Isolation Room Equipment

There are two remote monitoring possibilities with the ACCUSTAT™: A direct interface with the building management system (ACCUSTAT™ BMS) or a localized remote module (following section). The BMS is a built-in module to allow transmission of a 4-20 mA analog output. This can be tied into a BAS/EMCD system. An alarm contact is also provided by the monitor for visual or audible remote annunciation. The time-delayed audible alarm feature is activated after a one minute time expiration.

Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms Sensors



ACCESSORIES -
Remote Monitoring Panel

This option allows the status of up to six rooms to be individually monitored from a single monitoring station. The stainless steel panel contains six red and green status LEDs, which conform to the status of the individual stationary ACCUSTAT’s monitoring the rooms. An audible alarm signal with mute feature and bi-color LED for visual references, identify any room in non-compliance. Additional mute switches can be included to disable indications for individual rooms in the event the room isn’t being utilized to monitor negative pressure.

Room Pressure Monitor Negative Pressure Room Positive Pressure Room Sensor Room Pressure Monitors Negative Pressure Rooms Positive Pressure Rooms Sensors

Remote Monitoring Panel - Remotely monitor up to 6 locations with bi-color visual and audio alarm features.
ACCUSTAT™ Specifications
ACCUSTAT™ Stationary Model
Electrical Data
  • Operating power: 12V
  • Minimum/maximum voltage: 12V to 16V
  • Current Draw: 100 mA
  • Maximum draw: <2W
Monitoring Data
  • Microswitch pressure transducer
  • Pressure range: -0.100 to +0.100 inches water
  • Display update: 1.0 second
  • Maximum over pressure: 5.0 psi
  • Accuracy of reading: ±1% F.S.
Mechanical Data
  • LCD display: 1 line
  • LCD character height: 0.5”
  • Cabinet: stainless steel
  • Dimensions: 7.367”(w) x 3.25”(h) x 2.25”(d)
  • Weight : 22 oz.
  • Mounting : Surface/wall mount
  • Operating temperature: 55-105°F (13°C to 41°C)
  • Operating humidity: 10% to 94% RH non-condensing
  • Pressure range: -0.001 to + 0.999WG
  • Sampling hole requirement: ¼ inch hole needed for sampling tube into room, ambient sensed directly from monitor.
Operation Data
  • Bi-colored visual alarm LED: green normal, red alarm mode
  • Visual alarm: immediate upon reaching setpoint
  • Audible alarm: one minute delay
  • Dry contact relay outputs
  • Alarm setpoint storage: non-volatile memory
  • Alarm setpoint: user determined adjusted from front panel
  • Alarm calibration: from front panel
  • Accuracy of alarm output: ±1% of setpoint
  • Standard range: ±0.1 inches of water (or ±25 Pascals)
  • Resolution: 0.001” of water (or 0.1 Pascals)
  • Alarm output: SPDT relay contacts rated at 1A at 30m VDC or 120 VAC Resistive
  • Analog outputs:
  • 0-5VDC, 2.5V at zero pressure 2mA max
  • 0-10VDC, 5V at zero pressure 2mA max
  • Max loop resistance is 580 ohms
  • Operating medium: Air or non-corrosive, non-explosive gas
  • Tamperproof controls:
  • On/Off keypad switch
  • Positive or negative indicator keyed switch
ACCUSTAT™ Stationary      AC-022
ACCUSTAT™ P-1 Portable      ACP-022
ACCUSTAT™ BMS      ACP-BMS-022


ACCUSTAT™ P-1 (Portable)
Identical to standard ACCUSTAT™, but includes:
  • 12V 1500 mAH NiMH battery pack for up to 19 hours of continuous operation
  • Battery chip to avoid overcharging
  • Easy carrying handle
  • Low battery indication on display
  • Light weight: 5 lbs
ACCUSTAT™ BMS
Pressure Range
  • Range: -.100 to ± .100 inches water (display)
  • Resolution: 1% of reading
  • Display Update: 1.0 second
  • Maximum Over Pressure: 5 psi
Electrical Outputs
  • Alarm: One SPDT relay can be set over range of -.05 to +.05 inches water. Contacts can be set for fail-safe operation (i.e. contact closed power loss.) Alarm output has built-in 1-minute delay, both red LED and piezo alarm.
  • Remote:
  • 4-20 mA, Standard Range 0-10 volts
  • -.100 to + .100 inches water
  • 7 mA + -.100 inches water
  • 12 mA + .000 inches water
  • ;17 mA + .100 inches water
  • Maximum Range: 1000 ft ≠ 20 awg wire into 250 ohms load
  • Maximum Power: 1.3 watts @ 24VDC 3 wire 4-20mA output 115VAC to 24VDC, step-down transformer provided (option)
Mechanical
  • LCD Display: 1 line
  • LCD Character Height: 0.50 inches
  • Cabinet: stainless steel
  • Dimensions: 7.37”(w) x 3.25”(h) x 2.25”(d)
  • Weight: 28 oz.
  • Shipping Weight: 3 lbs
Environmental
  • Operating Temperature : 55-105°F
  • Operating Humidity: 10% to 94% RH non-condensing
ACCUSTAT™ Room Pressure Monitors Pricing ACCUSTAT™ BMS Pricing
AC-022 ACCUSTAT (Stationary Model)
(Includes transformer & stainless steel wall
plate to secure probe tube)
$732.00
ACP-BMS-002 ACCUSTAT BMS
(Interfaces with Building Management System)
(Includes S/S wall plate & probe tube)
$945.00
ACP-022 ACCUSTAT (Portable Model)
(Includes battery charger and probe tube)
$1070.00
Pricing: FOB factory
Delivery: Stock
Pricing Subject to change without notice

Last Update: 8/30/07
Getting to know room pressure monitors for negative & positive pressure rooms.
With various products available, deciding on the correct isolation room pressure monitoring equipment for your application is an important decision to make only once. As a result it will save you time, aggravation and money later. It can be easier to make that decision when all the important facts are addressed. It’s a decision you want to make once and not be reminded every time there is a staff complaint or malfunction.

Some companies claim to offer a “pressure room differential monitor” when in actuality it is instead an “air flow monitor.” An instrument where the probe head measures “flow direction” is an airflow monitor. They reference the flow rate and extrapolate from that a pressure reading. Flow rate to pressure reading, can something get lost in the translation? You bet, especially when the probe head gets clogged with the buildup of airborne particles constantly passing over it. That alters the flow rate in both directions. When the flow rate changes so do the calculations and the result is a false alarm, even if the room pressure is compliant, but the device doesn’t know that.






Periodic cleaning and adjustments are in order. Since many rooms can just barely maintain negativity the slightest variance in pressure even caused by negative pressure room users and maintenance personnel who have to contend with irrelevant alarms.

The ACCUSTAT Room Pressure Monitor by comparison is a true room pressure monitoring device. Airflow isn’t measured, only differential air pressure. The quality of the air is irrelevant because nothing passes through or over the probe, so nothing needs to be cleaned, adjusted or replaced. Particles of dust don’t influence our room pressure readings. Forgetting to clean the probe doesn’t produce false alarms. Blocking or a sudden stream of air across the probe head doesn’t alter the readings with the ACCUSTAT, because that shouldn’t alter the pressure.

The ACCUSTAT maintains accurate consistent readings and does not degradate with use. The ACCUSTAT’s consistent monitoring to .001” WG is compliant with current CDC guidelines for isolation room monitoring. The minute delay, keyed on/off, lighted numeric display, muting, remote, colored LED and many more features are part of the ACCUSTAT package. You can be guaranteed years of trouble-free operation. Thousands of ACCUSTATS Room Pressure Monitors are in operation worldwide, some for as long as 14 years, and are still providing accurate monitoring of negative and positive isolation rooms for the safety and security of health care facilities and their staffs. It was an accurate decision then and the right decision now.

Product Details:
Room Pressure Monitor for Negative Pressure Rooms and Positive Pressure Rooms
Title
Link
ACCUSTAT P1 Portable Room Pressure Monitor
ACCUSTAT Pressure Differential Monitor
Manual ACCUSTAT Negative Pressure Rooms
Model Numbers Negative & Positive Pressure Rooms
Specifications
Submittal Drawing
BMS
Stationary & P1 Room Pressure Monitors

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Isolation Room Equipment/Room Pressure Monitors/Negative Room Pressure and Positive Room Pressure/Pressure Sensor
The CDC Guidelines require that Isolation rooms occupied by TB patients have differential pressure monitored daily by a differential pressure measuring device. The Biological Controls’ ACCUSTAT is a room pressure monitoring device that measures differential pressure between a controlled space and a referenced space. Pressure measurement for a variable volume air supply and exhaust systems is critical for the conservation of energy and the air purification system, as well.

US Center for Disease Control over a decade ago has required hospitals and health care facilities to house patients with infections which potentially could spread through the air in negative pressure rooms. Hospitals and all other health related organizations require positive pressure for surgical suites and areas with immune-compromised patients to limit the chances of airborne infection spreading through the facility. Biological Controls ACCUSTAT Room Pressure Monitor accurately measures the actual room pressure differential, verifying the proper operation of your HVAC or your air purification system to help you maintain patient safety.

CDC Guidelines were established and requirements so that a successful project to develop a new Isolation Room in any institution should include early involvement of the nursing staff who will manage the room, the Infection Control Department, and the maintenance staff as well as the architect who will design the space. In many cases hospital and health care facilities convert and existing room into an isolation room, within the facilities as the need arises. Thus creating the need for a Room Pressure Monitor for negative and positive pressure, Hospital Isolation Room Equipment.

Important Engineering Features for Negative Pressure Rooms and Positive Pressure Rooms:
The room airflow should be a minimum of 12 air changes per hour. The CDC Guidelines do not specify if the airflow or exhaust airflow should equal 12 air changes per hour, but making the supply airflow equal to 12 air changes per hour is the most conservative approach. They do specify that the exhaust airflow volume should exceed the supply airflow volume by 10% or 50 CFM, whichever is greater, to maintain a negative pressure within the room with respect to surrounding areas. The negative pressure will cause an inward flow of air into the Isolation Room when the doors are opened, preventing the migration of airborne pathogens to the surrounding areas. The effectiveness of the 12 air changes standard has not been proven with regard to minimizing TB bacteria in a room; however, actual experiments have proven that increasing airflow rates in hospitals does show a reduction in total bacteria counts in the air.

The ACCUSTAT pressure sensor, sensing through pressure the static differential between the two referenced spaces. If variable volume is used, it is imperative that accurate, reliable controls be used to sense the pressure differential between the patient room and the surroundings and adjust the air purification/ exhaust system to maintain the desired pressure differential. The CDC Guidelines specify a minimum pressure differential of 0.001 inches w.g. (water gauge). Which can be accomplished utilizing the ACCUSTAT Room Pressure Monitor.

ACCUSTAT Room Pressure Sensor is CDC compliant in providing a visible and/or audible alarm when low air pressure is sensed, while incorporating a time delay, to allow persons to enter or leave the room without activating the signal. If an anteroom is provided with the Isolation Room, the guidelines require that the Isolation Room be maintained at negative pressure with respect to the anteroom. The pressure relationship between the anteroom and the corridor is that the anteroom should be slightly negative to the corridor and is measured utilizing a probe tube.

The Isolation Room should be well sealed from the surroundings to help maintain the pressure differentials. Penetrations through walls must be sealed and drywall ceiling should be used or drop ceiling tiles that are impervious to air. Swinging doors are easier than sliding doors.

Aspergillus Control (MOLD)
While the Joint Commission on Accreditation of Healthcare Organizations (JCAHO) has long required the operation and maintenance of building systems to address infection control issues, an increased national focus on patient safety has recently prompted it to add more specific requirements to the Environment of Care, EC.1.9

Specifically, beginning January 1, 2001, the utility systems management program must “reduce the potential for organized-acquired illness,” and maintain “appropriate pressure relationship, air exchange rates, and filtration efficiencies for ventilation systems serving areas specifically designed to control airborne contaminants,” such as dust and biological agents. JCAHO will focus additional attention on precautions taken to protect high risk patients. Subsequently more health care facilities and hospitals will find greater need to create negative air pressure Isolation Rooms and the need to monitor room pressure. Biological Controls Room Pressure Monitors Sensor Isolation Room Equipment comes with a complete two year warranty and customer support.

Despite the risk analysis, however, always ensure that proper air pressure relationships in an area with high risk patients. Develop protocols to ensure that proper ventilation rates are maintained annually.

Limiting the spread of disease through a health care facility, patients suspected of having diseases will spread through the air and must be placed in negative pressure rooms, airborne infection Isolation Rooms. Similarly, immune-compromised patients at risk of contracting diseases should stay in positive pressure, protective environment rooms. Biological Controls' room pressure monitors continuously controls room pressure, by monitoring differential to comply with standards from the CDC Centers for Disease Control and AIA American Institute of Architects.

Features and Benefits of ACCUSTAT Room Pressure Monitor for Negative & Positive Pressure Rooms
  • Creates a complaint, controlled and safe environment
  • Highly sensitive pressure transducer eliminating the varying inconsistencies of “airflow” monitors
  • CDC Complaint providing visual, audible and alarm signals
  • Large lighted digital readout identifies subfractional pressure changes within .001” WG
  • Continuously measurements monitoring of actual room pressure differential
  • Temperature compensation for consistent performance within specified temperature ranges
  • Three models Stationary, Business Management System and Portable (multiple locations)
  • Portable Unit preferred by facilities using mobile equipment (Click here for MICROCON® The Mobile Hospital Air Purification System) room to room set up temporary or short term negative or positive pressure environments. (Click here for Isoport our Portable Isolation Room Enclosure)
  • Remote Monitoring up to six rooms
  • Pressure sensor sensing through pressure the static differential between the two referenced spaces
Room Pressure Monitors for Clean Rooms
Most significant concern is contamination control and is of utmost importance in a clean room. High air change rates and laminar airflow are two of the methods used to keep impurities away from crucial yield. Measures can become ineffective if the clean room pressure differential should go negative, sucking in contaminants. ACCUSTAT clean room pressure monitors sensor constantly measure the room pressure differential, signaling if the space goes negative so appropriate action can be taken.

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