Water Activity Analyzer
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| Brand | METER Group, Inc. |
|---|---|
| Origin | USA |
| Model | Aqualab 4TE DUO |
| Measurement Principle | Chilled-Mirror Dew Point |
| Temperature Control | Dual-Zone Peltier (±0.1 °C) |
| Water Activity Range | 0.01–0.98 aw |
| Resolution | 0.001 aw |
| Moisture Content Accuracy | Up to 10× higher than gravimetric methods for hygroscopic matrices |
| Calibration Traceability | NIST-traceable saturated salt standards |
| Data Security | User-access levels, audit trail, password-protected settings |
| Compliance | Supports FDA 21 CFR Part 11, GLP/GMP documentation requirements |
| Sample Equilibration Time | <5 min typical |
| Power | 100–240 VAC, 50/60 Hz |
| Brand | Aqualab |
|---|---|
| Origin | USA |
| Model | 4TE DUO |
| Sensor Type | Mirror Condensation Dew Point Sensor |
| Accuracy (aw) | ±0.003 aw |
| Resolution (aw) | ±0.0001 aw |
| Measurement Range (aw) | 0.1000–0.9500 aw |
| Repeatability (aw) | ±0.001 aw |
| Moisture Content Resolution | ±0.01% |
| Moisture Content Repeatability | ±0.02% |
| Temperature Control Range | 15–50 °C |
| Temperature Accuracy | ±0.2 °C |
| Temperature Resolution | 0.01 °C |
| Sample Volume | 7 mL (max 15 mL) |
| Measurement Time | <5 min (avg. 2.5 min) |
| Data Storage Capacity | 8,000 readings |
| Display | 128×64 pixel backlit LCD |
| Interface | RS-232, USB |
| Dimensions | 26.7 × 17.8 × 12.7 cm |
| Weight | 3.18 kg |
| Power | 110–220 VAC, 50/60 Hz, <0.4 A |
| Operating Environment | 4–60 °C, 0–90% RH (non-condensing) |
| Certifications | CE |
| Warranty | 1 year (parts & labor) |
| Brand | Aqualab |
|---|---|
| Origin | USA |
| Model | Aqualab 4TE |
| Sensor Principle | Mirror Condensation Dew Point |
| Accuracy | ±0.003 aw |
| Resolution | 0.0001 aw |
| Measurement Range | 0.030–1.000 aw |
| Repeatability | ±0.001 aw |
| Temperature Control Range | 15–50 °C |
| Temperature Accuracy | ±0.2 °C |
| Temperature Resolution | 0.01 °C |
| Sample Volume | 7 mL (max 15 mL) |
| Measurement Time | <5 min (avg. 2.5 min) |
| Data Storage Capacity | 8,000 secure readings with timestamp, user ID, and calibration logs |
| User Accounts | Up to 25 configurable usernames/passwords |
| Interface | RS-232, USB |
| Display | 128×64-pixel backlit LCD |
| Dimensions | 26.7 × 17.8 × 12.7 cm |
| Weight | 3.18 kg |
| Power | 110–220 V AC, 50/60 Hz, <0.4 A |
| Operating Environment | 4–60 °C, 0–90% RH (non-condensing) |
| Certifications | CE, AOAC Official Method 975.13, FDA 21 CFR Part 11 compliant (audit trail, electronic signature support) |
| Brand | Aqualab |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Pawkit |
| Price Range | USD 1,400–7,000 (est.) |
| Sensor Type | Capacitive Hygrometric Sensor |
| Accuracy | ±0.02 aw |
| Resolution | ±0.01 aw |
| Measurement Range | 0.00–1.00 aw |
| Repeatability | ±0.01 aw (typical, per AOAC 978.17) |
| Sample Cup Volume | 7 mL (max. 15 mL) |
| Measurement Time | < 5 min |
| Display | 6-digit custom LCD (3-digit aw + 3-digit °C) |
| Dimensions | 6.6 × 10.7 × 2.0 cm |
| Weight | 115 g |
| Power Supply | Two 3 V CR2032 lithium coin cells (3-year typical service life) |
| Operating Environment | 4–60 °C |
| Certifications | CE Marked |
| Warranty | 1 year parts & labor (extendable) |
| Brand | Aqualab / METER Group |
|---|---|
| Origin | USA |
| Model | AquaLab Pre |
| Sensor Type | Mirror Condensation Dew Point (Standard), Capacitance (Optional) |
| Accuracy | ±0.01 aw (Dew Point), ±0.015 aw (Capacitance) |
| Resolution | 0.001 aw |
| Measurement Range | 0.05–1.000 aw |
| Repeatability | ≤ ±0.002 aw |
| Temperature Control | Fixed at 25.0 °C (±0.2 °C stability) |
| Temp. Resolution | 0.1 °C |
| Sample Volume | 7 mL recommended (max 15 mL) |
| Measurement Time | < 5 minutes |
| Display | 20-character alphanumeric backlit LCD |
| Interface | RS-232, USB |
| Dimensions | 24.1 × 22.9 × 8.9 cm |
| Weight | 3.2 kg |
| Power | 110–220 VAC, 50/60 Hz, < 0.4 A |
| Operating Environment | 4–60 °C, 0–90% RH (non-condensing) |
| Certifications | CE, AOAC Official Method 978.18 |
| Warranty | 1 year parts and labor |
| Brand | Aqualab |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported Instrument |
| Model | AquaLab VSA |
| Price Range | USD 25,000 – 62,500 (converted at ~¥200,000–¥500,000) |
| Measurement Principle | Mirror Condensation Dew Point |
| Isotherm Methods | Dynamic Dew-point Isotherm (DDI) & Dynamic Vapor Sorption (DVS) |
| Accuracy | ±0.005 aw |
| Resolution | ±0.001 aw |
| aw Range | 0.030–0.950 |
| Repeatability | ±0.003 aw |
| Temperature Control | 10–60 °C (STP adjustable) |
| Temp Stability | ±0.1 °C |
| Max Operating Pressure | ≤7 psi |
| Sample Mass Range | 500–5000 mg |
| Mass Resolution | ±0.1 mg |
| Sample Cup Volume | 7.5 mL (recommended), up to 15 mL |
| Water Reservoir Volume | 7 mL (max 15 mL) |
| Display | 128×64-pixel backlit LCD |
| Dimensions | 25.4×38.1×30.5 cm |
| Enclosure | Machined aluminum frame with flame-retardant silicone resin |
| Weight | 14.97 kg |
| Power | 110–220 V AC, 50/60 Hz |
| Operating Environment | 4–60 °C, 10–90% RH (non-condensing) |
| Certifications | CE |
| Warranty | 1 year (parts & labor) |
| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer | Bigdipper Industrial Chemistry Research Institute |
| Model | HBD5-MS2100 sWA |
| Measurement Range | 0.003–0.999 a<sub>w</sub> |
| Accuracy | ±0.003 a<sub>w</sub> (at <0.1°C ambient) |
| Repeatability | ±0.015 a<sub>w</sub> (at <±0.3°C ambient) |
| Resolution | 0.001 a<sub>w</sub> |
| Sensor Type | Imported high-precision ERH sensor |
| Sample Chamber Diameter | 48 mm |
| Host Dimensions | 180 × 70 × 50 mm |
| Host Weight | 0.4 kg |
| Power Supply | Rechargeable Ni-Cd battery (2 h continuous operation, 1 week standby) or 220 V AC adapter |
| Operating Environment | 0–50°C, 0–85% RH |
| Compliance | GB/T 34790–2017 |
| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | HBD5ms2100 sMS |
| Water Activity Range | 0.000–1.000 aw |
| Accuracy | ±0.015 aw |
| Repeatability | ±0.005 aw |
| Resolution | 0.001 aw |
| Moisture Content Range | 0.0–100.0% (w/w) |
| Moisture Accuracy | ±2.0% abs |
| Moisture Repeatability | ±0.5% abs |
| Moisture Resolution | 0.1% |
| Operating Temperature | −20 to +85 °C (moisture extension up to 200 °C) |
| Environmental Operating Range | −10 to +60 °C, 0–99% RH |
| Test Modes | Rapid, Pre-cut, Equilibrium |
| Typical Rapid Test Time | 3–5 min |
| Power Supply | Rechargeable NiCd battery (HBD5 variant), 24 h continuous operation, 1 week standby |
| Intrinsic Safety Rating | Ia, suitable for Class 1, Groups A/B/C/D and Class 2, Groups E/F/G hazardous locations |
| Enclosure Rating | NEMA 2 |
| Data Storage | Non-volatile memory (2 MB), power-loss protected |
| Communication Interface | RS-232 / RS-485 |
| Sensor Architecture | Polymer-based capacitive humidity sensor with integrated temperature compensation |
| Calibration | Factory-calibrated |
| Brand | AQUALAB |
|---|---|
| Origin | USA |
| Model | AquaLab TDL 2 |
| Measurement Principle | Tunable Diode Laser Absorption Spectroscopy (TDLAS) at H₂O-specific isotopic absorption line (1368.59 nm) |
| Range | 0.0000–1.0000 aw |
| Resolution | 0.0001 aw |
| Accuracy | ±0.005 aw @ 25 °C |
| Repeatability | ±0.001 aw |
| Temperature Control Range | 15–50 °C |
| Temp. Accuracy | ±0.1 °C |
| Measurement Time | ≤5 min (standard), 1 min (optional rapid mode) |
| Operating Environment | 0–90% RH non-condensing, 4–50 °C ambient |
| Interface | RS-232 & USB |
| Compliance | USP <922>, AOAC Official Method 2014.01, ISO 21807:2022, ASTM F1980-22 |
| Brand | NovaSina |
|---|---|
| Origin | Switzerland |
| Model | LabMaster-aw neo |
| Measurement Range | 0.0300–1.000 aw |
| Accuracy | ±0.0001 aw |
| Temperature Control Range | 0–60 °C |
| Temperature Stability | ±0.01 °C |
| Display | 240 × 480 LCD |
| Dimensions | 260 × 440 × 220 mm |
| Weight | 9.8 kg |
| Power Supply | 90–260 V, 50/60 Hz, max. 65 W |
| Protection Rating | IP21 |
| Interface | RS-232, USB, D-Sub 9M/9F |
| Brand | Novasina |
|---|---|
| Origin | Switzerland |
| Model | LabMaster-aw neo |
| Measurement Range | 0.0300–1.000 aw |
| Temperature Control Range | 0–60 °C |
| Temperature Stability | ±0.01 °C |
| Display | 240 × 480 LCD |
| Interface | RS-232, USB, D-Sub 9M/9F |
| Dimensions | 260 × 440 × 220 mm |
| Weight | 9.8 kg |
| Power Supply | 90–260 VAC, 50/60 Hz, max. 65 W |
| Protection Class | IP21 |
| Sensor Technology | NOVALYTE® Electrolytic Conductivity Sensor (Contactless, Maintenance-Free) |
| Calibration Standards | Factory-supplied saturated salt solutions (4–100% RH equivalent) |
| Brand | NovaSina |
|---|---|
| Origin | Switzerland |
| Model | LabStart-aw |
| Instrument Type | Portable |
| Measurement Range | 0.030–1.000 aw |
| Accuracy | ±0.01 aw |
| Temperature Range | 15–30 °C |
| Temperature Accuracy | ±0.1 °C |
| Display | Backlit LCD (shows aw, temperature, RH%) |
| Weight | 1 kg |
| Sample Cup Capacity | 20 reusable cups included |
| Calibration Standard | Non-consumable, multi-year service life |
| Brand | Novasina |
|---|---|
| Origin | Switzerland |
| Model | LabStart-aw |
| Measurement Range | 0.030–1.000 aw |
| Operating Environment | 5–40 °C, ≤85% RH (non-condensing) |
| Sensor Type | CM-4 Capacitive Electrolyte Sensor |
| Temperature Control | None (ambient measurement only) |
| Temperature Range for Measurement | 15–30 °C |
| Temperature Accuracy | ±0.3 K |
| Resolution | 0.01 aw |
| Accuracy | ±0.03 aw |
| Display | Backlit LCD (aw, °C, %RH) |
| Sample Cups | 20 reusable stainless-steel cups included |
| Data Storage | None (real-time readout only) |
| Power Supply | 90–264 VAC, 50–60 Hz |
| Dimensions (H×W×D) | 85 × 140 × 225 mm |
| Weight | 1.2 kg |
| Brand | NovaSina |
|---|---|
| Origin | Switzerland |
| Model | LabSwift-aw |
| Instrument Type | Portable |
| Measurement Range | 0.03–1.000 a<sub>w</sub> |
| Accuracy | ±0.001 a<sub>w</sub> |
| Temperature Operating Range | 5–45 °C |
| Host Weight | 1.2 kg |
| Calibration | Factory-performed 6-point calibration |
| Data Storage | Integrated SD card |
| Display | Large LCD |
| Brand | Novasina |
|---|---|
| Origin | Switzerland |
| Model | LabSwift-aw |
| Measurement Range | 0.03–1.000 aw |
| Resolution | 0.01 aw |
| Accuracy | ±0.01 aw |
| Temperature Range | 5–45 °C |
| Temperature Accuracy | ±0.15 K |
| Weight | 1.2 kg |
| Data Storage | SD card |
| Calibration | Factory 6-point certified calibration |
| Sensor Type | CM-2 dual-electrolyte resistive sensor |
| Compliance | NIST-traceable, FDA-recommended, ISO 21807 compliant |
| Brand | Novasina |
|---|---|
| Origin | Switzerland |
| Model | LabTouch-aw |
| Measurement Range | 0.030–1.000 aw |
| Temperature Control Range | 15–30 °C |
| Accuracy | ±0.001 aw |
| Temperature Accuracy | ±0.1 °C |
| Display | Full-color TFT touchscreen |
| Probe Type | Patented Resistive Electrolyte Sensor (REMS) |
| Standard Reference | Long-life saturated salt solution standards |
| Host Weight | 1 kg |
| Compliance | NIST-traceable calibration, FDA-recognized methodology, ISO 21807, AOAC 975.34, USP <1112> |
| Brand | Novasina |
|---|---|
| Origin | Switzerland |
| Model | LabTouch-aw |
| Measurement Range | 0.030–1.000 aw |
| Operating Temperature | 5–45 °C |
| Temperature Control Range | 15–30 °C |
| Temperature Accuracy | ±0.15 K |
| Water Activity Resolution | 0.01 aw |
| Water Activity Accuracy | ±0.005 aw |
| Display | Large LCD touch screen |
| Data Storage | Internal memory for test data and methods |
| Connectivity | SD card, RS-232, USB |
| Dimensions (H×W×D) | 105 × 200 × 300 mm |
| Weight | 2.8 kg |
| Brand | Steroglass |
|---|---|
| Origin | Italy |
| Model | aWlife |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Range | 0.030–1.000 a<sub>W</sub> |
| Operating Environment | +5°C to +50°C |
| Net Weight | 3.85 kg |
| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | OEM Manufacturer |
| Country of Origin | China |
| Model | RLS-2 |
| Measurement Range | 65–85% (w/w) |
| Sampling Time | <2 s per measurement |
| Measurement Output | Single-shot or averaged over 10 consecutive samplings |
| Accuracy | ≤ ±1.0% (within 70–78% range) |
| Repeatability | ≤ ±0.5% (within 70–78% range) |
| Power Supply | 9 V DC (1 × 6F22 battery) |
| Power Consumption | ~45 mW |
| Dimensions | 180 × 50 × 28 mm |
| Display | 3-digit LCD with Chinese character support |
| Operating Temperature | 0–40 °C |
| Relative Humidity Range | 20–90 % RH |
| Audible/Visual Alarm | Enabled for out-of-spec results and low-battery condition |
| Customizable Thresholds | Per-meat-type moisture acceptance limits |
| Baseline Calibration Function | Auto-calculates species-specific baseline from up to 20 reference gravimetric (oven-dry) measurements |
| Deviation Alert | Flashing display when single reading deviates >2.0% from recent moving average |