Alicat Whisper Flow Calibrators

Accuracy at Calibration Conditions After Tare: ±0.75% of reading or ±0.1% of full-scale (whichever is greater)
High Accuracy at Calibration Conditions After Tare: ±0.6% of reading or ±0.1% of full-scale (whichever is greater)
Accuracy for Bidirectional Meters at Calibration Conditions After Tare: ±0.75% of reading or ±0.1% of total span (whichever is greater) from positive full-scale to negative full-scale
Repeatability: ± 0.02% full-scale
Temperature Sensitivity:
—Mass flow zero shift: ±0.03% of full-scale per °C from tare temperature
—Mass flow span shift: ±0.01% of reading per °C from 25°C
Pressure Sensitivity:
—Mass flow zero shift: ±0.01% of full-scale per ATM from tare pressure
—Mass flow span shift: ±1% of reading per atmosphere from calibration conditions
Operating Range/Turndown Ratio: 0.01% to 100% full-scale/10,000:1 turndown
Sensor Response Time: <1 ms>
Typical Indication Response Time (indication response time includes user adjustable averaging up to 255 ms): 127 ms (user adjustable)
Warm-Up Time: <1 second>
Operating Temperature: −10 to +60 °C
Humidity Range (non-condensing): 0 to 95%
Maximum Internal Pressure (static): 60 psig (damage possible above 10 PSID differential pressure)
Wetted Materials: 302/303 stainless steel, Viton, glass-reinforced polyphenylene sulfide, alumina, glass, gold, silicon, heat-cured epoxy, heat-cured silicone rubber
Certification: CE, NIST
Programmed Gases:
Short Name—Long Name
Air —Air (Clean Dry)
Ar —Argon
CH₄ —Methane
CO —Carbon Monoxide
CO₂ —Carbon Dioxide
C₂H₆ —Ethane
H₂ —Hydrogen
He —Helium
N₂ —Nitrogen
N₂O —Nitrous Oxide
Ne —Neon
O₂ —Oxygen
C₃H₈ —Propane
n-C₄H₁₀ —Normal Butane
C₂H₂ —Acetylene
C₂H₄ —Ethylene (Ethene)
Kr —Krypton
Xe —Xenon
C-25 —25% CO₂, 75% Ar
C-10 —10% CO₂, 90% Ar
C-8 —8% CO₂, 92% Ar
C-2 —2% CO₂, 98% Ar
C-75 —75% CO₂, 25% Ar
He-25 —25% He, 75% Ar
He-75 —75% He, 25% Ar
A1025 —90% He, 7.5% Ar, 2.5% CO₂
Star29 —Stargon CS (90% Ar, 8% CO₂, 2% O₂)
P-5 —5% CH₄, 95% Ar
iButen —Isobutylene
C-15 —15% CO₂, 85% Ar
C-20 —20% CO₂, 80% Ar
C-50 —50% CO₂, 50% Ar
He-50 —50% He, 50% Ar
He-90 —90% He, 10% Ar
Bio5M —5% CH₄, 95% CO₂
Bio10M —10% CH₄, 90% CO₂
Bio15M —15% CH₄, 85% CO₂
Bio20M —20% CH₄, 80% CO₂
Bio25M —25% CH₄, 75% CO₂
Bio30M —30% CH₄, 70% CO₂
Bio35M —35% CH₄, 65% CO₂
Bio40M —40% CH₄, 60% CO₂
Bio45M —45% CH₄, 55% CO₂
Bio50M —50% CH₄, 50% CO₂
Bio55M —55% CH₄, 45% CO₂
Bio60M —60% CH₄, 40% CO₂
Bio65M —65% CH₄, 35% CO₂
Bio70M —70% CH₄, 30% CO₂
Bio75M —75% CH₄, 25% CO₂
Bio80M —80% CH₄, 20% CO₂
Bio85M —85% CH₄, 15% CO₂
Bio90M —90% CH₄, 10% CO₂
Bio95M —95% CH₄, 5% CO₂
EAN-32 —32% O₂, 68% N₂
EAN —3 6% O₂, 64% N₂
EAN-40 —40% O₂, 60% N₂
HeOx20 —20% O₂, 80% He
HeOx21 —21% O₂, 79% He
HeOx30 —30% O₂, 70% He
HeOx40 —40% O₂, 60% He
HeOx50 —50% O₂, 50% He
HeOx60 —60% O₂, 40% He
HeOx80 —80% O₂, 20% He
HeOx99 —99% O₂, 1% He
EA-40 —Enriched Air-40% O₂
EA-60 —Enriched Air-60% O₂
EA-80 —Enriched Air-80% O₂
Metab —Metabolic Exhalant (16% O₂, 78.04% N₂, 5% CO₂, 0.96% Ar)
LG-4.5 —4.5% CO₂, 13.5% N₂, 82% He
LG-6—6% CO₂, 14% N₂, 80% He
LG-7 —7% CO₂, 14% N₂, 79% He
LG-9 —9% CO₂, 15% N₂, 76% He
HeNe-9 —9% Ne, 91% He
LG-9.4 —9.4% CO₂, 19.25% N₂, 71.35% He
SynG-1 —40% H₂, 29% CO, 20% CO₂, 11% CH₄
SynG-2 —64% H₂, 28% CO, 1% CO₂, 7% CH₄
SynG-3 —70% H₂, 4% CO, 25% CO₂, 1% CH₄
SynG-4 —83% H₂, 14% CO, 3% CH₄
NatG-1 —93% CH₄, 3% C₂H₆, 1% C₃H₈, 2% N₂, 1% CO₂
NatG-2 —95% CH₄, 3% C₂H₆, 1% N₂, 1% CO₂
NatG-3 —95.2% CH₄, 2.5% C₂H₆, 0.2% C₃H₈, 0.1% C₄H₁₀, 1.3% N₂, 0.7% CO₂
CoalG —50% H₂, 35% CH₄, 10% CO, 5% C₂H₄
Endo —75% H₂, 25% N₂
HHO —66.67% H₂, 33.33% O₂
HD-5 —LPG: 96.1% C₃H₈, 1.5% C₂H₆, 0.4% C₃H₆, 1.9% n-C₄H₁₀
HD-10 —LPG: 85% C₃H₈, 10% C₃H₆, 5% n-C₄H₁₀
OCG-89 —89% O₂, 7% N₂, 4% Ar
OCG-93 —93% O₂, 3% N₂, 4% Ar
OCG-95 —95% O₂, 1% N₂, 4% Ar
FG-1 —2.5% O₂, 10.8% CO₂, 85.7% N₂, 1% Ar
FG-2 —2.9% O₂, 14% CO₂, 82.1% N₂, 1% Ar
FG-3 —3.7% O₂, 15% CO₂, 80.3% N₂, 1% Ar
FG-4 —7% O₂, 12% CO₂, 80% N₂, 1% Ar
FG-5 —10% O₂, 9.5% CO₂, 79.5% N₂, 1% Ar
FG-6 —13% O₂, 7% CO₂, 79% N₂, 1% Ar
P-10 —10% CH₄ 90% Ar
D-2 —Deuterium

*Restek Recommends: Recalibrate your Alicat flow calibrator once every year to maintain lifetime warranty. Prolonged failure to recalibrate your unit may result in increased error. To always get the most accurate measurements, contact Restek Customer Service to send in your flow calibrator for service, recertification, and recalibration (cat.# 26462).
** Note: Handling, removing, or replacing the battery will void the Alicat warranty.