56 AIR POLLUTION INSTRUMENTATION
Environmental Measurements Ambient air sampling
systems are designed to collect and store pollutant and
tracer gases in sampling bags for their subsequent analy-
sis. Also available are heavy and regular duty Tedlar air
sampling bags. These sampling bags are available in sizes
from 0.5 to 300 liters. An automatic sequential or radon
bag sampler designed for unattended gas collection may be
programmed by the user to collect up to 8, 12, 16, or 24
hourly samples over a 96-hour period. This self-contained
battery operated system is operated in real time and is
designed for use in harsh environments. Environmental
Measurements, 215 Leidesdorff Street, San Francisco, CA
94111, 408-734-0713.
GCA Environmental A fibrous aerosol monitor pro-
vides a real-time count of airborne fibers in the presence of
large concentrations of nonfibrous particles. A respirable
dust monitor tells how much respirable dust is in the air
being breathed. A recording dust monitor is designed for
short and extended time monitoring of respirable dust. GCA/
Environmental Instruments, Burlington Road, Bedford,
MA 01730, 617-275-9000.
Gastech Inc. Portable and fixed detectors and alarms
measure combustible and toxic gases, oxygen deficiency,
hydrocarbons, and airborne halogens. Calibration kits are
also available for a variety of gases. Gastech, Inc., Johnson
Instrument Div., 331 Fairchild Drive, Mountain View,
CA 94043, 415-967-6794.
General Metal Works High-volume filtration samples
feature continuous flow controllers and recorders, weather-
proof housings, and stainless steel inlet tubing materials.
Integrated packages can be ordered which comply with fed-
eral and state monitoring regulations. Related equipment
which can be specified includes timers, flowmeters, impac-
tors, and calibration units. General Metal Works Inc., 8368
Bridgetown Road, Cleves, OH 45002, 513-941-2229.
General Monitors Single-channel system for continuous
monitoring of combustible gas concentrations consists of a
remote sensing assembly and a solid state controller. Control
electronics include an analog meter scaled from 0–100% LEL
and four vertically arranged LEDs. The LEDs indicate high
and low alarm status, normal operation and any malfunc-
tion conditions. A digital display from 0–99% LEL is one of
many user-selected options available. Relay options include
a choice of normally energized or de-energized high and
low alarms, latching or non-latching high and low alarms, or
sealed relays. General Monitors Inc., 3019 Enterprise Street,
Costa Mesa, CA 92626, 714-540-4895.
Horiba Instruments Instruments and integrated single
or multi-gas monitoring systems are for stack gas and ambi-
ent air applications. Sampling and continuous equipment
is available. Instruments include NDIR gas analyzers free
of interference from water vapor and carbon dioxide, and
flame ionization analyzers for measuring total hydrocar-
bons. Systems are custom designed and may include remote
computerized operation and automatic calibration. Horiba
Instruments Inc., 1021 Duryea Avenue, Irvine, CA 92714,
714-540-7874.Interscan Corporation Toxic gas monitors available from
pocket alarm units and dosimeters to complete plant-scale
multipoint systems. The line includes analyzers for CO, SO 2 ,
H 2 S, NO/NO 2 /NO x , and Cl 2. Additionally, systems which may
use products manufactured by others, specified by the cus-
tomer, are available. Examples of this are multi-gas and source
monitoring systems. Interscan Corp., 9614 Cozycroft Avenue,
Chatsworth, CA 91311, 213-882-2331.
Kurz Instruments Constant flow air samplers are
produced for low volume air sampling, for sampling of
organics or particulates. Flow ranges are available from 30
sccm to 150 slpm. They are mass flow controlled and refer-
enced to EPA standards of 25C and 760 mmHG. Vacuum
capability as high as 20 Hg and control accuracy of 3%
reading over a wide temperature range are standard. Higher
sampling requirements are handled by the high volume air
samplers, which sample from 20–60 scfm. Kurz Instruments
Co., Box 849, Carmel Valley, CA 93924, 408-659-3421.
Lamotte Chemical Portable air quality sampling and
measurement outfit provides individual tests for 14 major
contaminants. Tests are provided for ammonia, bromine,
cadmium, carbon monoxide, chlorine, cyanide, hydrogen
peroxide, hydrogen sulfide, iodine, lead, nitrogen dioxide,
ozone, phenols, and sulfur dioxide. The outfit features a
portable air sampling pump with calibrated flowmeter. The
absorbing solutions, which are contained in the impinger,
collect the air to be tested. Driven by 4 standard “D” cell
batteries, the pump will sample up to 2.5 liters per minute at
6 volts and is capable of maintaining flow rate for 48 hours
of continuous sampling. An adjustable flow-meter regulates
and indicates the air sampling rate. The sampling pump is
furnished with flow-meter, impinger holder, batteries, and
connection tubing. Lamotte Chemical Products Co., Box
329, Chestertown, MD 21620, 301-778-3100.
Mast Development Company Portable and online
instruments measure ambient and work place TLV levels of
ozone, chlorine, fluorine, bromine, and iodine. Appropriate
calibration devices are also available, including automatic
bubble meter for the determination of low air flow in devices
using miniature pumps. Mast Development Co., 2212 E.
12th Street, Davenport, IA 52803, 319-326-0141.
Met One Equipment, systems, technical, and engineer-
ing assistance provided for complete meterological environ-
mental monitoring, measuring, and control. Systems provide
statistics on wind direction and velocity, ambient air temper-
atures, relative humidity, precipitation and solar radiation.
Portable and permanent systems available. Met One, Box
60279, Sunnyvale, CA 94088, 408-733-9100.
Mine Safety Appliances Analyzers and sampling sys-
tems are supplied for the measurement of contaminants
such as SO 2 , NO 2 , CO, CO 2 , hydrocarbons, and oxygen.
Applications include monitoring power plant stacks, metal-
lurgical processes, combustion control, and solvent recovery
beds. Mine Safety Appliance Company, 600 Penn Center
Boulevard, Pittsburgh, PA 15235, 412-273-5101.
Monitor Labs Ambient air analyzers, calibrators, data
loggers, telemetry systems, and computer-based monitoringC001_004_r03.indd 56C001_004_r03.indd 56 11/18/2005 10:12:47 AM11/18/2005 10:12:47 AM