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Shanghai Weichuan Precision Instruments Co., Ltd.

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BrandAII
OriginUSA
ModelGPR-1000
Measurement Ranges0–1000 ppm, 0–1% (10,000 ppm), 0–25% O₂
Accuracy±1% of full scale
Resolution0.01 ppm (in ppm range)
Sensor TypeGPR-12-100-M electrochemical cell
Sensor Lifetime24 months at 25°C with average O₂ < 1000 ppm
Response Time (t₉₀)10 s
Recovery Time to 100 ppm after air exposure10 min in N₂
Operating Temperature5–45°C
Sample Pressure5–30 psig inlet, vented to atmosphere
Flow Rate0.25–2.5 L/min
Display2.75″ × 1.375″ monochrome LCD
Enclosure RatingNEMA 4X
Dimensions4″ × 9″ × 3″
Weight8 lbs
PowerRechargeable battery (60-day standby life)
Output Signal0–1 V analog
Temperature CompensationBuilt-in
CalibrationAmbient air or certified gas ≥80% of selected span
CertificationsIntrinsically safe or explosion-proof rated (per applicable Class I Div 1/Zone 1 requirements)
Wetted Materials316 stainless steel
Optional AccessoriesIntegrated sampling pump, carrying case, inlet particulate filter, on/off switch module
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BrandAII
OriginUSA
ModelGPR-1900
SensorGPR-12-333
Measurement PrincipleElectrochemical (Galvanic)
Accuracy<1% of Full Scale
Range Options0–10 ppm, 0–100 ppm, 0–1000 ppm, 0–1%, 0–25% O₂
Resolution0.001 ppm
Response Time (t₉₀)<10 s
Operating Temperature5–45 °C
Sample Pressure5–30 psig (inlet), max 100 psig
Sample Flow Rate0.5–1.5 L/min (recommended: 1 L/min)
Output SignalsIsolated 4–20 mA and 0–1 V analog
Power Supply19–28 VDC or 220 VAC (configurable)
Enclosure Dimensions7″ × 4″ × 4.5″ (H×W×D)
Weight8 lbs
Wetted Materials316 Stainless Steel
CertificationsCE, ISO 9001, Class I, Division 1, Groups A–D (with appropriate intrinsically safe barrier)
Sensor Lifetime24 months at ≤1000 ppm avg O₂, 25 °C
CalibrationAuto-zero & span
CompensationAutomatic temperature & pressure compensation
Display5″ × 2.75″ backlit LCD
Interface1/8″ compression fittings, RS-232 serial port
IP RatingNEMA 4X equivalent (front panel with sealed membrane keypad)
Warranty12 months (instrument + sensor)
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BrandAII
OriginUSA
ModelGPR-18 Series
Measurement PrincipleElectrochemical Fuel Cell
Range0–1/10/100/1000 ppm, 0–1%/25% FS
Sensor TypeMicro-fuel-cell (e.g., XLT-12-333 for CO₂-rich streams)
Accuracy<0.5% FS
Linearity>0.995
Response Time (T₉₀)10 s
Operating Temperature5–45 °C
Storage Temperature–30 °C
Sample Flow Rate1–5 SCFH (recommended: 2 SCFH)
Inlet Pressure5–30 psig (max 100 psig)
Outlet PressureAmbient
Power Supply220 VAC, 50/60 Hz
Output Signals0–1 V DC and isolated 4–20 mA
Display Resolution0.01 ppm
Enclosure RatingNEMA 4X/7, Class I, Division 1, Groups B–D
CertificationsFM, CSA, CE, ISO 9001
Calibration Gas80% FS O₂ standard
Temperature CompensationBuilt-in
Gas CompatibilityInert gases, He, H₂, CO₂-containing mixtures (with XLT sensor), acidic gas streams
Optional AccessoriesXLT-12-333 sensor, heated sample conditioning system (for sub-ppm analysis), flow control valve, shut-off valve, rotameter
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BrandAII
OriginUSA
ModelGPR-2300
Measurement PrincipleSupergalvanic Electrochemical Sensor
Range0–100% O₂ (Auto/Manual Span Selection)
Accuracy±0.1% of full scale (at 25°C, 1 atm)
Resolution0.01% of full scale
LinearityR² > 0.995
Response Time (T₉₀)10 s
Recovery Time (Air → 10 ppm)30 min (60 s with purge)
Sensor Lifetime>24 months at 1000 ppm O₂
PowerRechargeable battery (30-day runtime per charge)
EnclosureAnodized aluminum, NEMA 4X rated
Dimensions5" × 9" × 3" (127 × 229 × 76 mm)
Weight8 lbs (3.5 kg)
Operating Temperature−5 to +45°C with built-in temperature compensation
Pressure Range5–100 psig
Sample Flow Rate0.2–5 L/min (recommended: 1 L/min)
CertificationsISO 9001, CE, Class I, Division 1, Groups A, B, C, D (Intrinsically Safe)
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BrandAII
OriginUSA
ModelGPR-3500MO
PrincipleSupergalvanic electrochemical sensor
Range0–100% O₂
Accuracy±0.1% O₂ (at ambient temperature, atmospheric pressure, and fixed flow rate)
Resolution0.01% O₂
LinearityR² > 0.995
Response Time (t₉₀)13 seconds
Sensor Lifetime>24 months
CertificationsISO 9001, CE, CSA/NRTL
PowerRechargeable battery with 220 V AC charger
DisplayBacklit LCD showing real-time O₂ concentration, sample pressure, and temperature
Sample Flow Rate0.2–3 L/min (recommended: 1 L/min)
Calibration Gas98–100% O₂ standard
Operating Pressure Range5–100 psig (with automatic pressure compensation)
Operating Temperature Range–5 to +45 °C (with automatic temperature compensation)
Gas Path ComponentsIntegrated flow control valve, rotameter, rapid purge system, 1/8" Swagelok® compression fittings
EnclosureAnodized aluminum, NEMA 4X rated
Dimensions5" × 9" × 3" (127 × 229 × 76 mm)
Weight8 lbs (3.6 kg)
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BrandAII
OriginUSA
ModelGPR-1100
Measurement PrincipleElectrochemical Fuel Cell
Range Options0–10 / 0–100 / 0–1000 ppm, 0–1% / 0–25% FS
Accuracy<1% FS
Linearity>0.995
Response Time (t₉₀)10 s
Recovery Time to 10 ppm≤60 s
Sensitivity Drift<0.5% FS
Temperature CompensationBuilt-in
Operating Temp5–45 °C
Sample Flow Rate0.25–2.5 L/min (recommended: 1 L/min)
Inlet Pressure5–30 psig
Outlet PressureAmbient
Display Resolution0.01 ppm
Output Signal0–1 VDC
Enclosure RatingNEMA 4X (aluminum-clad)
Dimensions102 × 229 × 76 mm
Weight3.5 kg
CertificationsCE, ISO 9001, Class I, Division 1, Groups A–D (intrinsically safe)
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BrandAII
OriginUSA
ModelGPR-1200
Detection PrincipleElectrochemical (Galvanic)
Sensor TypeGPR-12-333 (standard), XLT-12-333 (optional)
Measurement Range0–10 / 0–100 / 0–1000 ppm, 0–1% / 0–25% FS
Accuracy<1% FS (at 25°C, 1 atm)
Sensitivity<0.5% FS
LinearityR² > 0.995
Response Time (T₉₀)10 s
Recovery Time (to <10 ppm)≤60 s
Operating Temperature5–45°C (GPR sensor), –20–45°C (XLT sensor)
Sample Flow Rate0.5–5 SCFH (recommended: 2 SCFH)
Inlet Pressure5–30 psig
OutletVent to atmosphere
Gas CompatibilityH₂, He, N₂, Ar, CO₂ (with XLT), acidic gases, mixed industrial gases
Enclosure RatingIP65 (waterproof housing)
Safety CertificationATEX/IECEx-compliant intrinsic safety — Class I, Division 1, Groups A–D
PowerRechargeable Li-ion battery (60-day standby life per charge)
Output Signal0–1 V analog
DisplayBacklit LCD
Sampling SystemStainless steel bypass manifold
CalibrationTwo-point (zero/span) with 80% FS span gas recommended
ComplianceCE-marked, ISO 9001:2000 certified
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BrandAII
OriginUSA
ModelGPR-2500ATEX
Measurement PrincipleBreakThrough electrochemical sensor technology
Range0–1%, 0–10%, 0–20%, 0–25% O₂ (selectable)
Accuracy±0.1% O₂ (calibrated with 98–100% O₂ in N₂ standard gas)
Resolution0.01% O₂
Sensor Lifetime24 months in 100% O₂
LinearityR² = 0.995
T90 Response Time13 seconds
Pressure CompensationAutomatic, 5–100 psig
Temperature CompensationAutomatic, –5 to +45 °C
Sample Flow Rate1–3 SCFH (recommended: 2 SCFH ≈ 1 L/min)
Analog Outputs0–1 V DC and 4–20 mA
Digital InterfaceUSB for remote control and data logging
DisplayBacklit LCD with real-time pressure & temperature readout
Enclosure MaterialAnodized aluminum
MountingPanel-mount (cutout: 178 × 223 mm)
Dimensions190 × 274 × 315 mm (W × H × D)
Weight~5 kg
CertificationsCE, ISO 9001
Hazardous Area RatingATEX II 2G Ex d IIB T4 Gb
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BrandAII
OriginUSA
ModelGPR-1200MS
Measurement Range0–1, 0–10, 0–100, 0–1000 ppm (selectable)
Detection Limit10 ppb
Accuracy±1% of full scale
Sensor TypeElectrochemical (GPR-12-2000MS), maintenance-free
Expected Sensor Life24 months at 25°C and avg. 100 ppm O₂
Response Time (t₉₀)10 s
Recovery Time to 10 ppm in N₂ after air exposure20 min
Operating Temperature5–45 °C
Sample Pressure5–30 psig inlet, vent to atmosphere
Flow Rate0.25–2.5 L/min (recommended: 1 L/min)
Display2.75″ × 1.375″ LCD, resolution 0.01 ppm
Enclosure RatingNEMA 4X
Dimensions8.6″ × 9″ × 3″
Weight12 lbs
PowerRechargeable battery (60 days standby, ~1 day with pump active)
CertificationsCE, ATEX/IECEx compliant intrinsic safety for Class I, Div. 1, Groups A, B, C, D
Sample Wetted Materials316 stainless steel
Output Signal0–1 V analog
LinearityR² ≥ 0.995 across all ranges
Temperature CompensationBuilt-in
User InterfaceRotary range selector, waterproof membrane keypad, LED status indicators (low battery, charging)
Optional AccessoriesIntegrated sampling pump, explosion-proof carry case, inline particulate filter
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BrandAII
OriginUSA
ModelGPR-1300
Measurement PrincipleGalvanic Electrochemical Sensor
Range0–10 / 0–100 / 0–1000 ppm (user-selectable)
Accuracy±1% of full scale (at 25°C, 1 atm)
Resolution0.1% of full scale
LinearityR² > 0.995
T90 Response Time≤10 s
Recovery Time≤30 min (from air to 10 ppm)
Sensor Lifetime>24 months at 1000 ppm O₂
PowerRechargeable battery (30-day operation per charge)
DisplayBacklit LCD with real-time sample pressure & temperature readout
EnclosureAnodized aluminum, NEMA 4X rated
Explosion ProtectionClass I, Division 1, Groups A, B, C, D (intrinsic safety certified)
Operating Temperature–5°C to +45°C with built-in temperature compensation
Operating Pressure5–100 psig
Sample Flow Rate0.1–5 L/min (recommended: 1 L/min)
CertificationsISO 9001, CE
Dimensions5" × 9" × 3" (W × H × D)
Weight8 lbs (≈3.5 kg)
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BrandAII
OriginUSA
ModelGPR-2500MO
Measurement Range0–100% O₂
Accuracy±1% FS (±0.1% FS when calibrated with 95–100% O₂ standard)
Sensor TypeGPR-11-120-4 electrochemical cell
Sensor Lifetime24 months at 25°C
Response Time (t₉₀)10 seconds
Operating Temperature5–45°C
Sample Pressure5–30 psig inlet, vent to atmosphere
Sample Flow Rate0.5–2.5 L/min (recommended: 1.0 L/min)
Output Signal4–20 mA (2-wire, 12–28 VDC
Display2.75″ × 1.375″ LCD, 0.1% resolution, real-time temperature & pressure readout
Enclosure RatingNEMA 4X
Dimensions4″ × 9″ × 3″
Weight8 lbs
CertificationsCE, intrinsically safe for Class I, Division 1, Groups A–D (with appropriate barrier)
CompensationAutomatic temperature and pressure compensation
CalibrationSingle-point, using certified gas ≥80% of full scale
Sample Wetted Materials316 stainless steel
OptionalRemote sensor mounting kit
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BrandAII
OriginUSA
ModelGPR-2000
Measurement Range0–1%, 0–5%, 0–10%, 0–25% (user-selectable)
Full-Scale Accuracy<1% FS
Resolution0.001% O₂
Response Time (t₉₀)10 s
Operating Temperature–10°C to +45°C (GPR sensor), –20°C to +45°C (XLT sensor)
Sample Pressure5–30 psig inlet, vent to atmosphere
Flow Rate0.25–2.5 L/min (recommended: 1.0 L/min)
Output Signal0–1 V analog
Sensor Lifetime36 months (GPR-11-32-RT, 25°C)
Enclosure RatingNEMA 4X
Weight8 lbs
Dimensions4" × 9" × 3"
CertificationsCE, ATEX/IECEx compliant for Class I, Div. 1, Groups A, B, C, D (intrinsically safe)
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BrandAII
OriginUSA
ModelGPR-2800 AIS
Explosion ProtectionATEX II 2G Ex ia IIC T4 Ga / UL Class I, Division 1, Groups A–D
Measurement Range0–1%, 0–5%, 0–10%, or 0–100% O₂ (selectable)
Accuracy±1% of full scale
Response Time (t₉₀)10 s
Operating Temperature–10 to 45°C (sensor), –20 to 45°C (electronics)
Pressure CompensationYes
Temperature CompensationYes
Output4–20 mA (2-wire, loop-powered)
Power Supply12–28 VDC (24 VDC typical with safety barrier)
Enclosure RatingNEMA 4X (IP66)
Weight3.6 kg (8 lbs)
Sensor TypeElectrochemical (GPR-11-32-4), maintenance-free
Sensor Lifetime≥36 months at 25°C
Display2.75″ × 1.375″ backlit LCD, 0.01% resolution
Flow Rate0.25–2.5 L/min (recommended: 1.0 L/min)
LinearityR² ≥ 0.995 across all ranges
CalibrationSingle-point using certified gas ≥80% of selected span
Sample Interface1/8″ compression fitting
Wetted MaterialsCorrosion-resistant (e.g., 316 SS, FKM, PTFE)
OptionalRemote sensor mounting (XL-CX-2 cable kit)
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