Attachment 1 - Statement of Need.pdf

STATEMENT OF NEED

CAVITY RING-DOWN SPECTROMETER IDIQ

REQUISITION NUMBER: NR-MJ1000-23-00783

PURPOSE:

NOAA/OAR/Global Monitoring Laboratory is in the process of procuring Picarro or equal trace gas analyzers for near-simultaneous measurement of CO2, CH4, CO, and H2O, and possible repairs to existing cavity ring-down instruments. Instruments to be procured must maintain or improve upon the precision of current aircraft and field instrumentation used within the NOAA Global Greenhouse Gas Reference Network:

● Picarro G2401 or equal: a cavity ring-down spectrometer for measurements of carbon monoxide, carbon dioxide, methane and water vapor. This instrument is to be used to measure ambient air at surface and tall-tower sites.

● Picarro G2401-m or equal: an aircraft flight-ready, cavity ring-down spectrometer for measurements of carbon dioxide, methane, carbon monoxide and water vapor. This instrument is to be used to measure ambient air collected with pressurized and unpressurized aircraft. The NOAA GML Carbon Cycle aircraft program plans to expand its airborne trace-gas measurements to include data collected from commercial aircraft.

● Picarro G5310 or equal: a mid-infrared (IR) cavity ring-down spectrometer for measurements of nitrous oxide, carbon monoxide, and water vapor. This instrument is to be used to measure N2O in our AirCores, which is a balloon-borne atmospheric whole-air sampling system.

● Picarro G2201-I or equal: a cavity ring-down spectrometer for measuring carbon dioxide and methane in an isotope-only mode or a simultaneous mode capturing both measurements. The analyzer will be used in our mobile lab to measure the carbon-13 isotope signatures of methane and carbon dioxide, which can help to identify different methane and carbon dioxide sources (biogenic vs. anthropogenic) in urban areas.

TECHNICAL SPECIFICATIONS:

The G2401 or equal analyzer must be capable of measuring:

● CO2 in bulk air samples to or better than ± 0.05 parts per million (ppm) in 400 ppm

● CH4 in bulk air samples to or better than ±0.5 nmol/mol (ppb) in 1800 ppb

● CO in bulk air samples to or better than ±4 nmol/mol (ppb) in 100 ppb as 1-σ over a 30-second averaging period.

The analyzer must have a measurement range of at least:

● 0 – 1000 ppm CO2

● 0 – 20 ppm CH4

● 0 – 5 ppm CO

The analyzer must be extremely stable and not subject to rapid drift in response to environmental influences such as pressure and temperature changes. The cell temperature and pressure must be controlled to within ±0.01°C and ±0.15 Torr to prevent measurement drift associated with temperature and pressure fluctuations. The analyzer must be able to measure ambient air with a wide range of conditions, from -10 to +45 °C in temperature and 400 – 1330 hPa in pressure.

NR-MJ1000-23-00783

The analyzer should minimize sample gas consumption by having a small sample cell volume and efficient flushing of internal components such as tubing, valves, etc. The analyzer needs to be deployable to the field, as well as in the laboratory.

The G2401-m or equal analyzer must be capable of measuring:

● CO2 in bulk air samples to or better than ± 0.05 parts per million (ppm) in 400 ppm

● CH4 in bulk air samples to or better than ±0.5 nmol/mol (ppb) in 1800 ppb

● CO in bulk air samples to or better than ±4 nmol/mol (ppb) in 100 ppb as 1-σ over a 30-second averaging period.

The analyzer must have a measurement range of at least:

● 0 – 1000 ppm CO2

● 0 – 20 ppm CH4

● 0 – 5 ppm CO

The analyzer must be extremely stable and meet thresholds for drift of ≤ 10 ppb for CO; ≤ 0.2 ppb for CO2; and 2 ppb for CH4 at standard temperature and pressure (STP) over 24 hours. The cell temperature and pressure must be controlled to within ±0.01°C and ±0.15 torr to prevent measurement drift associated with temperature and pressure fluctuations. The analyzer must be able to measure ambient air with a wide range of conditions, from -10 to +45 °C in temperature and 400 – 1330 hPa in pressure. The analyzer should minimize sample gas consumption by having a small sample cell volume and efficient flushing of internal components such as tubing, valves, etc. The analyzer needs to be deployable to pressurized and unpressurized aircraft, as well as in the laboratory and in the field.

The G5310 or equal analyzer must be capable of measuring:

● CO in bulk air samples to or better than ±0.5 nmol/mol (ppb) in 100 ppb

● N2O in bulk air samples to or better than ±0.5 nmol/mol (ppb) in 300 ppb as 1-σ over a 30-second averaging period.

The analyzer must have a measurement range of at least:

● 0 - 1 ppm CO

● 0 – 500 ppb N2O

The analyzer must be extremely stable and not subject to rapid drift in response to environmental influences such as pressure and temperature changes. The cell temperature and pressure must be controlled to within ±0.01°C and ±0.2 Torr to prevent drift associated with temperature and pressure fluctuations. The analyzer should minimize sample gas consumption by having a small sample cell volume and efficient flushing of internal components such as tubing, valves, etc.

The analyzer needs to be deployable in the field, as well as in the laboratory.

The G2201-i or equal analyzer must be capable of measuring:

● δ13C in CO2 and δ13C in CH4 simultaneously in bulk air samples

● CO2 in bulk air samples to or better than 200 parts per billion (ppb) + 0.05% of reading

(δ12C-CO2) and 10 ppb + 0.05% of reading (δ13C-CO2) in 400 ppm of CO2 as 1-σ over a 30-second averaging period.

● CH4 in bulk air samples to or better than 5 ppb + 0.05% of reading (δ12C-CH4) and 1 ppb + 0.05% of reading (δ13C-CH4) in 2000 ppb of CH4 as 1-σ over a 30-second averaging period.

The analyzer must have a measurement range of at least:

● 0 – 2000 ppm CO2

● 0 – 12 ppm CH4

The analyzer must be extremely stable and meet thresholds for drift of <0.6‰ for δ13C-CO2;

<0.6‰ for δ13C-CH4 at standard temperature and pressure (STP) over 24 hours. The cell temperature and pressure must be controlled to within ±0.01°C and ±0.15 torr to prevent measurement drift associated with temperature and pressure fluctuations. The analyzer must be able to measure ambient air with a wide range of conditions, from -10 to +35 °C in temperature and 400 – 1330 hPa in pressure. The analyzer should minimize sample gas consumption by having a small sample cell volume and efficient flushing of internal components such as tubing, valves, etc. The analyzer needs to be deployable to pressurized and unpressurized aircraft, as well as in the laboratory and in the field.

Instrument Repairs:

● R4027 - WARM BOX ASSY WITH DE-WLM 1250-1450NM-FOR ALL G/SIXX

● R4028 - WARM BOX ASSY WITH DE-WLM 1500-1700NM-FOR ALL G/SIXX

● R4034 - Full Performance Verification (Material and Labor near-IR): precision, drift, environmental chamber, vibration, cross talk, 1D/2D/3D corrections as applicable

● R4035 - Full Performance Verification (Material and Labor mid-IR): precision, drift, environmental chamber, vibration, cross talk, 1D/2D/3D corrections as applicable

● R4036 - Fixed Material and labor charge for repairing the cavity assembly (near-IR)

● R4037 - Fixed Material and labor charge for repairing the cavity assembly (mid-IR)

● R4039 - Fixed Material and labor charge for repairing the Small cavity assembly (mid-

IR)

● R4043 - Material and labor charge for replacing the wavelength monitor (mid-IR WLM) assembly

● R4045 - Fixed material and labor charge for replacing the laser (mid-IR)

Name Marketing Description Long Description

R4027

WARM BOX ASSY WITH DE-

WLM 1250-1450NM-FOR ALL

G/SIXX

WARM BOX ASSY WITH DE-WLM 1250-

1450NM-FOR ALL G/SIXX

R4028

WARM BOX ASSY WITH DE-

WLM 1500-1700NM-FOR ALL

G/SIXX

WARM BOX ASSY WITH DE-WLM 1500-

1700NM-FOR ALL G/SIXX

R4034

Full Performance Verification (Material and Labor near-IR):

precision, drift, environmental chamber, vibration, cross talk, 1D/2D/3D corrections as applicable

Full Performance Verification (Material and Labor near-IR): precision, drift, environmental chamber, vibration, cross talk, 1D/2D/3D corrections as applicable

R4035

Full Performance Verification (Material and Labor mid-IR):

precision, drift, environmental chamber, vibration, cross talk, 1D/2D/3D corrections as applicable

Full Performance Verification (Material and Labor mid-IR): precision, drift, environmental chamber, vibration, cross talk, 1D/2D/3D corrections as applicable

R4036 Fixed Material and labor charge for repairing the cavity assembly (near-

IR)

Fixed Material and labor charge for repairing the cavity assembly (near-IR)

R4037 Fixed Material and labor charge for repairing the cavity assembly (mid-

IR)

Fixed Material and labor charge for repairing the cavity assembly (mid-IR)

R4039 Fixed Material and labor charge for repairing the Small cavity assembly

(mid-IR)

Fixed Material and labor charge for repairing the Small cavity assembly (mid-IR)

R4043 Material and labor charge for replacing the wavelength monitor (mid-IR WLM) assembly

Material and labor charge for replacing the wavelength monitor (mid-IR WLM) assembly

R4045 Fixed material and labor charge for replacing the laser (mid-IR) Fixed material and labor charge for replacing the laser (mid-IR)

All analyzers should be robust, be able to run unattended for months, and require little maintenance.