The Nimbus Infrared Gas Detectors provide hazardous and combustible gas
detection in the most extreme environments...
Nimbus is an
infrared instrument for combustible gas detection in hazardous areas
providing uninterrupted protection in challenging environments. Nimbus
is designed to be integrated with existing gas detection systems and can be
used in conjunction with digital communications networks or control system.
With optics operating at up to 90% obscuration; Nimbus gas detector is compact,
lightweight and suitable for use in inaccessible areas.
Durable & Reliable...
- Lightweight, yet sturdy, Nimbus is waterproof to Ingress Protection
standards IP66(jets of water) and IP67(submersion) The
detector is equipped with a removable weather shield that provides
additional protection against rainwater and other contaminants.
- Featuring Crowcon dependability, Nimbus has a MTBF (Mean Time Before
Failure) of 10 years. This is an average time between
equipment breakdowns
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Crowcon Nimbus
Infrared Gas Detector
Call for Price
FREE U.S. Shipping
1-877-688-2703
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Easy
Maintenance and Calibration...
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The user is alerted to need for cleaning when a "dirty optics"
signal is triggered by 75% obscuration. Easy to read at a
glance external status light shows if the detector is in normal
function or default
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Nimbus is designed for on-site configuration and is compatible with
portable computers allowing units to be checked by a single operator
Flexible
Installation...
- Its RS485 and 4-20mA industry standard outputs
make it easy to integrate into existing gas leak detection systems
- The
Modbus serial link allows integration into existing SCADA and DCS
systems
- In situations where pellistor type detectors have previously used,
conversion is made easy using an optional pellistor mimic,
eliminating the need cable upgrading.
Windows Compatible...
Compatible with Windows(tm), Nimbus
allows data exchange in the field via a laptop PC.
Nimbus Features...
- Nimbus is a fully automatic system
- Long service intervals make Nimbus cost
effective
- Can be configured and checked by a single
operator
- Innovative optical layout provides high
signal strength
- Meets Ingress Progression standards
IP66(jets of water) and IP67(submerssion)
- Nimbus has an MTBF(Mean Time Between
Failures) of 10 years
- Comes equipped with a removable weather
shield for additional protection against rainwater and other
contaminants
- Well suited for harsh offshore environments
and inaccessible areas
- Continues to operate even when its infrared
signal id 90% obscured by dirt and moisture
- "Dirty optics" warning signal is activated
when a 75% obscuration is reached, alerting the user that cleaning is
needed
Nimbus is an easy to operate and cost efficient
combustible gas detector designed for uninterrupted protection in harsh
environments. Nimbus is manufactured by Crowcon, a worldwide leader in
gas leak detection instruments for over 35 years. Crowcon's innovative
design and advanced technology provide customers with fair priced, low
maintenance hazardous gas detection equipment.
Mounting Options...
 
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Nimbus Specifications... |
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Function |
The detection of
hydrocarbon gases C 1 to C 6 + ethanol, ethylene and LPG
in the LEL range by means of infrared absorption.
Contact Crowcon for a full list of available
gases and ranges. |
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Dimensions |
125 x 170 x 210 mm (5 x
6.8 x 8.3 ins) |
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Weight |
2.5 kg, (5.5 lbs) |
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Construction |
LM25 marine grade alloy,
polyester powder coated |
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Optical system |
Dual wavelength,
dual detector |
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Optical performance |
Correct operation with up
to 90% obscuration
Dirty optics warning above 75% (configurable)
Heated optics to avoid condensation. |
Power consumption
– LK2 fitted (Anti Condensation Heater)
– LK2 not fitted |
Operating voltage: 10 to
32 V dc (nominal 24 V)
Operating current: 300 mA max (7.2 W @ 24 V, 3 W @ 10 V)
Operating current: 180 mA max (4.3 W @ 24 V, 1.8 W @ 10
V) |
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Typical output signals |
All levels configurable -
simultaneous sink and source output
0 mA: fault
2 mA: dirty optics
4-20 mA: 0-100% LEL
24 mA: over range |
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Status light
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Green - normal function
Orange - fault
Red - detecting gas
22 other conditions indicated by flash rate |
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Communications |
Modbus RS485 serial link |
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Functional testing |
Flow adaptor for gassing |
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Accuracy |
±2% of gas reading @ ≤ 50%
LEL
±5% of gas reading @ > 50% to 100% LEL |
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Response time |
<7 seconds - T90
<3 seconds – instantaneous high levels of gas |
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Temperature range |
-40ºC to 65ºC (-40ºF to
149ºF) |
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Humidity range |
0 to 99% RH non-condensing |
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European Approvals and
Standards |
ATEX II 2G EEx d
IIB+Hydrogen T6
Safety Cert. No:DEMKO01ATEX130838
Tamb = -40°C to 65°C EN50014, EN50018 |
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UL Approval and
Standards |
Class 1, Div 1, Groups B,
C & D
Tamb = -20°C to 65°C
UL 1203 (When connected to a class 2 Power Supply) |
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Ingress protection |
IP66 (jets of water)
IP67 (temporary submersion), NEMA 4X |
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Light immunity |
Totally immune to all
external light, both constant and modulated
(including sunlight, white light, flashing beacons etc.) |
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General immunity |
Totally immune to all
catalyst poisons |
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Electromagnetic compatibility |
Gas detection standard
EN50270
RF emissions EN50081-2
RF immunity EN50082-2 |
See our entire line of
Fixed Gas Monitors
or read about all
Gas Monitors.
If you have
any questions, call us toll free, we'll be glad to help!
1-877-688-2703
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