Toxalert GVU-NO2 User Manual

TM

DATA

TOXALERT

SHEET

NITROGEN DIOXIDE SENSOR MODEL GVU-NO
DIESEL EXHAUST GAS DETECTOR

TYPICAL INSTALLATIONS:

• Parking Garages • Vehicle Maintenance & Storage

• Bus Garages Highway Departments

• Fire Stations Utilities

• Warehouses Public Works

• Car Dealers • Tunnels

GENERAL DESCRIPTION:

The model GVU-NO2 nitrogen dioxide sensor is designed to interface
with Toxalert International GVU series control units. The Model GVU-

utilizes an electrochemical sensing element and is designed for

NO

2

ambient monitoring applications. It is intended for use in fixed
monitoring installations, and therefore continuous operation. The
GVU-NO
requires a four-wire connection from a controller that provides a
nominal 24VDC power source, common and return signal input. The
GVU-NO

has an effective range of 0-10 ppm. The sensor module

2

has indicators for power on, fault status and high NO2.

2

2

The Toxalert Nitrogen Dioxide (NO
energy savings. A common producer of NO
Diesel exhaust is a know cancer causing agent as reported in the U.S.
Department of Health and Human Services’ Current Intelligence
bulletin 50 dated August 1988. An electrochemical cell is required to
measure such small amounts of NO
measuring NO

in increments of 0.1 ppm.

2

) Transmitter combines safety and

2

is diesel engine exhaust.

2

. The device’s sensor is capable of

2

Model GVU-NO

2

FEATURES:

• Power on indication

• High NO

• Fault Indicator

• Low voltage class two (2) wiring

• Convenient diagnostics

• Simple maintenance

• Operating range meets OSHA standard

TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 [phone] FAX [phone]

Indication

2

Visit our website at www. toxalert. com

SPECIFICATIONS

•

Type: Electro-chemical cell diffusion barrier type

•Range: 0 to 10 ppm nitrogen dioxide in air

•Response Time: 30 seconds to 90% indication

•Typical life: Two years in normal service

•Accuracy: +/–5% of full scale

•Resolution: 0.1 ppm

•Operating Temperature: 4º to 122ºF

(–20ºC to 50ºC)

•Relative Humidity: 15 to 90% RH non-condensing

ELECTRICAL DATA:

• Input voltage: 24 VDC (provided from GVU control Unit)

•Wiring: 4 wire non-isolated

UNIT CONSTRUCTION:

•Mounting: Conduit 1/2” and 3/4” NPT or flexible cable

•Housing: Polystyrene, impact-resistant, non flammable, IP66

• Physical: 5.11”x 5.11” x 2.95” (13.0 x 13.0 x 7.5 cm)

•Weight: 14.2 oz.

INSTALLATION INSTRUCTIONS

1. INSTALLATION (For specific

details see sensor manual)

Locate a mounting location away
from direct fresh air intakes, and
mount vertically on wall or support
column approximately 3 to 6 feet
above floor. Refer to figures 1 and 2;
Table 1 and 2 and installation instruc­tions in GVU series control unit data
sheet and install the GVU-NO
sensor as follows.

2. MOUNTING SENSOR

Install the module housing onto the
end of the supply conduit and bolt
into position as required.

3. SENSOR WIRING

WARNING: To prevent fire or shock hazard, turn
off power source to control unit before making
connections. Comply with all local building codes and ordinances.

2

Figure 1:

TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 [phone] FAX [phone]

Visit our website at www. toxalert. com