Specification Sheet
Page 1 of 4
ALTAIR
®
4XR Multigas Detector
Bid Specifications
Physical Characteristics
Size
Instrument shall not exceed 4.4” L x 3.0” W x 1.4” D (11.2 cm x 7.6 cm x 3.5 cm).
Weight
8 oz (228 g)
Handling
Instrument shall be a one-hand operation device.
Case material
Rubberized over-mold.
Environmental protection
Instrument shall be approval agency-certified to IP68 protection levels
for dust and
water ingress.
Instrument shall be capable of immersion in up to 6.5 ft (2m) of water for 1 hour.
Impact protection Instrument shall exceed MIL-STD-810G repeated drop test requirements.
Instrument shall be capable of surviving an incidental 25-ft (7.62-m) drop.
Color
Charcoal or phosphorescent (glow-in-the-dark) housing.
User Interfaces
Display type
Liquid crystal display (LCD) with large, easy-to-read characters and icons.
Backlight
Unit must provide white backlight for low-light viewing.
Backlight time-out must be user-adjustable.
Keypad/switches
Unit must have no more than three switches or pushbuttons to operate.
There shall be no requirement to access hidden or internal switches for any
instrument operations. Buttons must be easy to operate when users wear gloves.
Data access
Access to data log and event log through infrared link to Windows-ready PCs.
Bluetooth connectivity
Unit shall be capable of transmitting device and alarm data via Bluetooth wireless
connection to a gateway device, such as an Android-based cellular phone.
Monitoring Capability
Gases
Instrument shall be capable of measuring up to four gases: combustible gas,
O
2
, and either H
2
S/CO, H
2
S-LC/CO, H
2
S-LC/SO
2
, or CO/NO
2
.
Sensor configuration
Ability to enable/disable individual sensor channels.
Sensor missing alarm
All sensor channels provide missing sensor alarm if sensor has been removed
and sensor channel has not been disabled.
Combustible gas display
Instrument shall be capable of displaying combustible gas reading as % Lower
Explosive Limit (LEL) or 0-5% CH
4
by volume.
Pressure compensation
Instrument oxygen sensor shall have built-in pressure compensation.
Sensor life monitoring
Instrument shall be able to alert user when a particular sensor nears end of life
following instrument calibration.
Sensor types
Instrument shall be available with the following gas sensing options:
Gas type
Range
Resolution
Combustible
0-100% LEL 1% LEL
0-5% Vol CH
4
0.05% Vol CH
4
O
2
0-30% Vol 0.1% Vol
CO 0-1999 ppm 1 ppm
H
2
S 0-200 ppm 1 ppm
H
2
S Low Concentration 0-100 ppm 0.1 ppm
SO
2
0-20 ppm 0.1 ppm
NO
2
0-50 ppm 0.1 ppm
Basic Operational Features
Instrument buttons
Buttons on instrument must be clearly marked and intuitive.
Inadvertent shutoff
Instrument shall be designed to protect against accidental shutoff.
Zero adjustments
Instrument shall provide Fresh Air Setup (FAS) function at user’s discretion.
Zero ad
j
ustment
lockout
FAS function will not allow unit to zero out hazardous readings.
Confidence signals
Periodic audible and visual signals shall indicate instrument
operation.
User must be able to disable audible and visual signals.