Biological Controls

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Biological Controls introduces
its newest ACCUSTAT, the P2DL Differential Pressure Room Monitor and Data Logger. Applications include Monitoring Negative Pressure or Positive Air Pressure in Asbestos Abatement, Lead paint Abatement, and Mold Abatement containment areas during Remediation Projects.

Asbestos, Lead Paint, and Mold are potential Killers. Mesothelioma is a rare cancer caused by Asbestos Exposure.

Asbestos Contractors performing Abatement Remediation may also be contracting for Mold and Lead Paint Abatement Remediation projects.

Respiratory exposure to airborne Lead Paint, Mold and Asbestos dust and fibers can be potentially deadly and can pose a serious health concern should exposure escalate to unsafe levels.

The Accustat Room Pressure Monitor and Data Logger performs a necessary and vital function for Asbestos Abatement Contractors, Lead Paint Abatement Contractors and Mold Abatement Contractors. The P2DL provides constant Negative or Positive Pressure Monitoring of the containment site and provides logging features to record and retain the site status records for confirmation and future reference. This assures that staff and surrounding personnel are safe and protected while the containment site is maintained in full OSHA compliance.



  • Construction & Renovation
  • Hospital Room Isolation
  • Bone Marrow Suites
  • Medical Labs
  • Intensive Care Units
  • Clean Rooms
  • Emergency Rooms
  • HVAC Systems
  • Laundry Areas
  • Research Facilities
  • Hospital Labs
  • Pharmaceutical Manufacturing
  • Laboratory Pressurization
  • Schools and Universities
Compact case


Differential Pressure Monitor
and Data Logger


For Monitoring Negative and Positive
Pressure in Asbestos Abatement,
Lead Paint Abatement, Mold Abatement,
Asbestos Remediation, Lead Paint
Remediation and Mold Remediation

Biological Controls introduces its next
generation ACCUSTAT P2DL portable
differential pressure monitor and data logger.
For over 12 years the original ACCUSTAT P1
has provided reliable service, versatility and
convenience as the original portable pressure
monitoring device. Now, the new P2 has
evolved with state-of-the-art instrumentation
and lots of new features, including the
ability to record and save data.
Virtually all of the components
have been redesigned,
re- engineered and upgraded.
Monitor either positive or
negative pressure by the
flick of the switch.
Measure pressures
from .001" WG
(inches of water)
or display in

Sampling rates
from once-a-second
to once-every-12 hours

The data logging feature
allows for storage of over
32,000 pressure readings
that are time-stamped
in permanent non-volatile
memory so the data is safe
regardless of what happens to P2DL
power or the time needed to retrieve the
data. Sampling rates from once-a-second to
once-every-12 hours may be selected thereby providing data records that may extend from 9 hours to over 2 years.

Windows® Compatible 

The User Software provided on a CD (also downloadable from the WEB) is compatible with most Windows OS computers including laptops and presented with a simple icon-driven menu. This allows start-up, select units and sampling rates, query current status, stop, or reset the logging, as well as viewing the stored P2DL data in an auto-scaling X-Y graphical-format that can be named, printed or exported to Microsoft EXCEL for custom presentations.

Non-volatile Memory

Just plug the provided USB cable from the P2DL faceplate to your computer and start logging. The P2DL can continue to log or suspend logging without the computer interface once started. This allows readings to be gathered when it is not convenient to be connected to a computer. The data can then be retrieved at your convenience. Status indicators (LEDs) are provided on the P2DL to identify Logging-Active, Suspended-Logging, Memory Full, and System Diagnostic Verification.

Measures Actual Pressure

The ACCUSTAT P2DL is a true pressure transducer and not an airflow meter. You get true direct accurate pressure readings regardless of the air quality and without recalibration or inconsistencies within the measured space. Housed in a newly designed virtually indestructible lockable polycarbonate case, its weatherproof design can take all the rigors of the road. In fact, the case comesview larger image with its own unconditional lifetime warranty. New electronic state-of-art components are housed within the lightweight (5 lb. all inclusive) compact totally self-contained enclosure. For added convenience the new P2DL has been designed to accommodate all of its accessories so they stow neatly, safely and conveniently inside the case. Nothing loose to get lost or damaged. Makes traveling with the unit, especially on a plane far easier and more convenient.

Battery operated or 100/240VAC plug in

Being portable, extended battery life for the P2DL was a major objective. So a new NiMH (Nickel- Metal Hydride) battery design was incorporated more than tripling the original battery life to over 48 hrs. on a single charge. Meanwhile, a new battery status monitoring display provides up to the second remaining power usage. Unit can also operate on plug-in 100VAC-240VAC 50/60Hz power input (international plug adapters are included). Automobile power port option is available for on-the-road charging using a car cigarette lighter port. New temperature compensation micro-circuits help improve reading stability between field use operations. Simple dial “zero” calibration feature makes occasional adjustment easy yet precise.

Software Download

Version 5.01
(File Size: 5MB)


(PDF File Size: 450KB)

Accessories include:
battery charger, 10' probe
tubing, 6' USB cable,
software program CD, storage
pouch, and adjustment tool.


All the data you need to know is easy to view and access and is directly at your fingertips. User friendly display panel with operational instructions permanently mounted makes set-up, operation and pressure monitoring easy, accurate and consistent. A large LCD display and LED indicators allow the user to adjust custom alert set points (both audible and visual.) The new P2DL provides you instantaneous readings, unparallel accuracy with incredible ease of operation.

Screen Views: Easy Log, Icon Driven User Interface.

Screen 1) Start data logger, stop, view saved data Screen 3) “Sample” screen showing current status of 11 function results
Screen 1) Start data logger, stop, view saved data Screen 3) “Sample” screen showing current status of 11 function results
Screen 2) Select units of measurement, range and sampling rate Screen 4) “Sample” screen of final function
Screen 2) Select units of measurement, range and sampling rate Screen 4) “Sample” screen of final function

Expect the same level of reliability and accuracy as from the original P1, but expect a new experience in versatility and portability with the new P2DL. The next generation of portable pressure monitoring instrumentation has just arrived.

Faceplate Illustration

Faceplate Illustration


ACCUSTAT P2DL Specifications

Pressure Monitoring Range Units:
Pascal or Water Column:

2 Selectable Ranges:
High - .000 - ± 1” WC or 0.00 Pa - ±300 Pa
Low - .000 - ± .250” WC or 0.00 Pa - ±62.5 Pa
Accuracy: ± 1% Full Scale
Data Sample Rate: 1 per second (Display or Log Memory)
Overload Pressure: ±138” WC or ±34K Pa Maximum
Panel Display:
LCD .1/2” Character Height
Differential Pressure Ports
2 Input Ports (P1 and P2 – Brass .125” OD Connectors)
Accommodates ¼” (.250”) OD flexible tubing.
10 feet Black UV resistant flex tubing included

Zero Calibration:
Display: ± Manual Dial Adjustment
Data Logger: ± Software Control

12VDC Input Power Port (12-15VDC) @ 288mW
Panel Jack 2.1mm ID x 5.5mm OD x 12 mm (Male)
Wall Power Module Accessory (powers unit and recharges battery)
Input: 100VAC-240VAC 50/60 Hz @ 600Ma eq/w 6’ power cord
(Includes International Plug Adaptors)
Output: 12VDC @1.5A (cord plug 2.1mm)
ID x 5.5mm OD x 12mm (Female)

7.2VDC Ni-MH type 2200mAh
+48 hrs continuous Battery operation
Recharge to 100% 6-24 hrs
Automobile Power Port (cigarette lighter) adaptor-cable
accessory option

Battery Monitor and Charging Circuits:
Regulates Charge rates and prevents overcharge
Displays % Charge and illuminates Charge LED

Pressure Alert Function:
Visual and Audible (with mute)
Accuracy: 1% of set point
User manual Adjust ±
Alert LED (select Green or blinking Red)

Operational Environment:
Temperature: 55ºF-105ºF (13ºC- 41ºC)
Humidity: 10% - 94% RH non-condensing
Sampling Medium: Air or non-corrosive, non-explosive gas only

Enclosure Dimensions and Weight:
Size: 9.60” X 7.42” X 4.00” ( LxWxH)
Molded PVC Plastic Box
Water, Dust, Corrosion Proof, Airtight, and UV protected
Padlock Ready
Color: Gunmetal Gray
Lid equipped with Quick-Start Instruction Panel and flex-tubing
storage area
Accessories Storage Compartment (all accessories fit within
(Optional) External access ports/covers for power and pressure tube access permitting use with the cover closed Unit Weight: 5 lbs. Including accessories

Data Logging Function:
User Interface Software/Drivers CD PC (Windows™/XP/VISTA (32bit) Interface and Accustat P2 USB to PC USB Cable included Auto Graph-Scaling and labeling functions for PC viewing or data printing Export of raw data to Excel

Copyright © 2009 Biological Controls
All Rights Reserved

Log LED Indicators:
Flashing Green LED – Logging Data
Solid Green LED – Log Suspend Mode
Red – Memory Full

Logger Storage Capacity:
34,500 Pressure Reading saved in nonvolatile memory
(no data loss if power fails)

Sampling Rates vs Memory Full
1 Sec - 9 Hours 30 Min - 1.8 Yrs
10 Sec - 3.7 Days 1 Hour > 2 Yrs
1 Min - 22 Days 6 Hour > 2 Yrs
5 Min - 3 Mths 12 Hour > 2 Yrs

Accessories Included:
1- Manual
10’- Flexible Tubing
1-Automobile Power Adaptor Cord (optional)
1-Wall Power Module eq/w international adaptors
1-Accessory storage bag
1- Software CD (eq/w optional Data Logger)
1- Calibration adjustment tool

749 Hope Road, Suite A, Eatontown, NJ 07724
Toll Free: 800.224.9768
Tel: 732.389.8922
Fax: 732.389.8821

Currently, there are no federal standards or recommendations, (e.g., OSHA, NIOSH, EPA) for airborne concentrations of mold or mold spores. Scientific research on the relationship between mold exposures and health effects is ongoing. This section provides a brief overview, but does not describe all potential health effects related to mold exposure. For more detailed information, consult a health professional or your state or local health department.

CDC State Local Health Departments Web site link:

Business Directories:


All to be told about Mold
Mr Gary Messina, President Biological Controls

Mold (mildew), are a type of fungi along with mushrooms and yeast and therefore can be found both indoors or outdoors. Molds are part of the natural environment and number more than 100,000 species worldwide and can be found almost everywhere. Besides existing in various colors it may appear to be slimy, powdery or even furry. It is capable of growing on food, wood, fabric, carpet, wallpaper glue, sheetrock, leather, paper, ducting, insulation and most other organic materials as long as oxygen and moisture are available.

Mold is in the air everywhere. When these tiny microscopic mold spores become airborne and land on wet or moist areas indoors they begin to grow. In locations and on materials where excessive moisture accumulates, mold will generally grow if the moisture remains uncovered and or uncorrected and where there is water, high humidity or damp conditions. This would include mold contamination of building components such as ventilation systems, walls, ceilings, floors, and support structures.  Ideal growing conditions are high humidity environments or under damp conditions and it will grow fastest in warm temperatures and high humidity conditions. When these conditions are ignored or when there is incorrect remediation the colony continues to grow. 

If the mold is disturbed or damaged it can become airborne and then you can breathe in the microscopic spores producing cold or flu like symptoms.

Controlling the moisture in the building can minimize mold growth. Heat, especially moist heat that results from steam leaks, may accelerate the growth of mold. As the mold grows, it digests whatever it is growing on and will gradually destroy it. Even if the mold cannot be seen, its presence may be noticed by a musty, moldy, stale or earthy smell. There is usually a great deal more mold out of sight than what is visible.

Certain people are allergic to mold. The most common symptoms of mold exposure are allergic reaction such as, cough, congestion, runny nose, eye irritation, or a variety of breathing and respiratory conditions including aggravation of asthma. These conditions may abate once the mold contamination is eliminated. More severe reactions may occur for workers exposed to mold on the job.

The best way to prevent mold is not to provide opportunistic growing conditions such as water, moisture sources and high humidity. But, where mold colonies have been established they are producing toxins that can be harmful to humans. This would depend upon the exposure levels and the persons immune system. Mold particles can be inhaled of mold is disturbed or damaged. Inhalation of fungal spores or metabolites (e.g., mycotoxins and volatile organic compounds) can lead to allergic reactions and cause toxic effects or cause infections. Certain symptoms (allergenic, toxic or infections) will develop in people exposed to fungi in an indoor environment depending upon their exposure level and susceptibility and how they are genetically predisposed. In order for there to be indoor exposure of fungal spores, metabolites through inhalation, physical contact or ingestion the fragments must be airborne.

Many mold species that are commonly found in indoor environments such as Aspergillus, Fusarium, Memnoniella, Penicillium, Trichoderma, and Stachybotrys can produce potent mycotoxins and volatile organic compounds (VOC). Mycotoxins are fungal metabolities that have been identified as toxic agents. Stachybotrys or black mold have been associated with health issues such as pathogenic disease, pulmonary disorders and cancer. Therefore, anyone performing renovation or the cleaning of fungi contamination or other bioaerosol exposure may be at risk of developing ODTS (Organic Dust Toxic Syndrome. ODTS can occur after as little as a single substantial exposure to dust particles contaminated with fungi to create flu-like symptoms. It is important to prevent the reoccurrence of contamination by promptly addressing the underlying causes such as moisture buildup and water damage. The rapid return and spread of mold may indicate an underlying problem such as a water leak.

Copyright 2004 - Biological Controls. All rights reserved.
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