The PCE-WAM 10 Water Activity Meter is a compact, portable aw tester designed for routine food QA/QC, product development, ingredient testing, seed and grain storage, and laboratory water activity measurements.
It measures water activity from 0.01 to 1.00 aw with 0.01 aw resolution and ±0.03 aw accuracy, while simultaneously displaying sample temperature.
Battery-powered operation, a backlit LCD, magnetic measuring chamber and approximately 5-minute typical measurement workflow make the PCE-WAM 10 a practical entry-level option for users who need straightforward water activity measurements without the higher cost or data-management features of more advanced laboratory systems.
Water activity (aw) describes how much water in a product is available to support microorganisms and participate in chemical, enzymatic and physical changes.
It is expressed on a scale approaching 0.00 to 1.00 aw, with pure water approximately equal to 1.00 aw under defined conditions.
Measuring water activity can help manufacturers and laboratories evaluate product stability, formulation changes, drying processes, ingredient consistency and microbial-growth potential.
Moisture content measures the total amount of water present in a material.
Water activity measures how available that water is. Two products can contain similar percentages of moisture while having very different water activity values and therefore different stability characteristics.
Water activity is an important intrinsic factor when evaluating food stability because microorganisms require available water in order to grow.
Routine aw testing can help food manufacturers monitor:
Water activity should be evaluated together with other product characteristics such as pH, formulation, processing, packaging and storage temperature when making food-safety or shelf-life decisions.
Water activity values around 0.85 aw are commonly discussed in food safety because most foodborne pathogens do not grow below approximately this level.
However, 0.85 aw is not a universal shelf-stability or product-safety limit. Yeasts and moulds can tolerate lower water activity, and the appropriate specification depends on the food, formulation, processing conditions, organism of concern and validated food-safety program.
The PCE-WAM 10 is particularly suited to routine food-industry applications where an economical and portable water activity measurement is required.
Potential applications include:
Product specifications should be established through an appropriate validation, shelf-life study, regulatory requirement or internal quality program rather than applying a single aw target to every food product.
Changes in formulation or processing can change water activity even when total moisture does not change dramatically.
The PCE-WAM 10 can support comparisons between:
Water activity is one component of a complete shelf-life study and should not be used by itself to establish a best-before date.
PCE specifically identifies seed storage among the applications for the PCE-WAM 10.
The meter can also be considered for suitable grains, feed ingredients, powders and other agricultural materials where water activity provides useful information about available moisture and storage behaviour.
Water activity testing can complement conventional moisture-content testing because the two measurements describe different properties of the material.
The PCE-WAM 10 provides an economical way to introduce water activity measurement into teaching, research, product-development and routine laboratory workflows.
Its portability makes it useful when measurements need to be performed at several locations rather than exclusively at one laboratory bench.
The PCE-WAM 10 operating instructions indicate that a sample is typically allowed to measure for approximately 5 minutes until the reading becomes stable.
The manual describes a maximum sampling period of approximately 10 minutes, with response values evaluated at 5-minute intervals.
Actual stabilization time can vary depending on the sample and temperature conditions.
A useful feature of the PCE-WAM 10 is its magnetic measuring attachment.
Once the sample has been placed into the tray, the measuring attachment covers the sample and helps create a secure measurement chamber protected from ambient light.
This compact integrated design allows the sensor and display to remain together in a portable instrument rather than requiring a separate benchtop chamber.
Consistent sample preparation is important for obtaining comparable water activity results.
For routine testing:
The PCE-WAM 10 displays both water activity and sample temperature.
Water activity is temperature dependent, so samples should be tested under stable and comparable temperature conditions whenever results are being compared.
Avoid immediately testing a refrigerated or heated sample against a room-temperature reference or production specification without considering the temperature difference.
Periodic checks using known water activity standards can help determine whether the meter is performing as expected.
Cambridge supplies Water Activity Standards across multiple reference points for routine instrument verification.
Select standards appropriate to the range of the products being tested and follow your quality system and instrument procedures for verification or correction.
The PCE-WAM 10 has a published accuracy of ±0.03 aw. A small difference between a reference standard and the displayed result does not automatically indicate that the meter is defective. Evaluate the difference against the instrument specification and repeat the check under stable temperature conditions before making an adjustment.
Cambridge offers both the PCE-WAM 10 and PCE-WAT 10 . Both are portable water activity meters with 0.01 aw resolution, but the WAT 10 provides tighter published accuracy and additional data-storage capability.
| Feature | PCE-WAM 10 | PCE-WAT 10 |
| Best Fit | Budget-friendly routine QA/QC | Step-up portable QA/QC |
| Water Activity Range | 0.01–1.00 aw | 0.00–1.00 aw |
| Resolution | 0.01 aw | 0.01 aw |
| Published Accuracy | ±0.03 aw | ±0.02 aw |
| Typical Measurement | Approximately 5 minutes to stable reading | Approximately 5 minutes |
| Onboard Result Memory | Not specified as a standard onboard feature | 99 records |
| Temperature Range | 0–50°C | -10–60°C |
| Temperature Accuracy | ±1°C | ±0.2°C |
| Included Sample Trays | 3 | 5 |
| Sample Tray Inside Diameter | 33 mm | 35 mm |
| Power | 2 × AAA | 3 × AAA |
Choose the PCE-WAM 10 when you need an economical, portable instrument for routine water activity checks and ±0.03 aw accuracy is appropriate for your application.
Choose the PCE-WAT 10 when you need tighter ±0.02 aw published accuracy, better temperature performance, 99-result onboard memory and additional included sample trays.
The PCE-WAM 10 is designed for straightforward routine measurement. A higher-performance meter may be more appropriate when you require:
Visit Cambridge's Water Activity Meter Comparison to compare the PCE-WAM 10 with the PCE-WAT 10, PCE-WAM 20, PCE-WAM 60, VEE GEE and aWLife systems.
| Model | PCE-WAM 10 |
| Order Number | PCE-WAM 10 |
| GTIN / EAN | 4250348732194 |
| Water Activity Range | 0.01 to 1.00 aw |
| Water Activity Resolution | 0.01 aw |
| Water Activity Accuracy | ±0.03 aw |
| Temperature Range | 0 to 50°C / 32 to 122°F |
| Temperature Resolution | 0.1°C / 0.18°F |
| Temperature Accuracy | ±1°C / ±1.8°F |
| Typical Measurement Time | Approximately 5 minutes to stable reading; manual describes up to approximately 10 minutes depending on stabilization |
| Display | Backlit LCD |
| Sensor | Non-conductive humidity sensor |
| Sample Tray Inside Diameter | 33 mm / 1.2 in. |
| Protection Class | IP20 |
| Menu Language | English |
| Operating Conditions | 0 to 50°C / 32 to 122°F, 0 to 95% RH |
| Storage Conditions | 0 to 50°C / 32 to 122°F, 0 to 95% RH |
| Power | 2 × 1.5 V AAA batteries |
| Dimensions | 150 × 68 × 68 mm / 5.9 × 2.6 × 2.6 in. |
| Device Weight | 244 g / 0.5 lb |
The instrument has an IP20 protection rating. Keep the meter and sensor protected from washdown, water ingress, condensation and direct contact with liquids during use and cleaning.
The standard PCE delivery scope does not list calibration standards as included.
The PCE-WAM 10 operating instructions document optional USB and Bluetooth data-output capability.
These interfaces are not listed in the standard delivery scope, so do not assume that a USB cable, Bluetooth accessory or PC software is included with the standard meter.
If computer data transfer is important to your application, confirm the required interface and accessory configuration with Cambridge before ordering.
The PCE-WAM 10 is a portable meter for routine water activity measurements in food, ingredients, grains, seeds and laboratory samples where ±0.03 aw accuracy is appropriate.
PCE specifies water activity accuracy of ±0.03 aw with 0.01 aw resolution.
The published PCE-WAM 10 water activity range is 0.01 to 1.00 aw.
The operating instructions indicate that readings are typically allowed to stabilize for approximately 5 minutes. Depending on the sample and conditions, stabilization may take longer.
Yes. The meter simultaneously displays water activity and sample temperature. The published temperature range is 0 to 50°C with 0.1°C resolution and ±1°C accuracy.
No. Moisture content measures total water, while water activity describes how available that water is for microbial, chemical and physical processes.
The PCE-WAM 10 can provide water activity measurements as part of a shelf-life study. Shelf life should still be established using appropriate product-specific microbiological, chemical, physical, processing, packaging and storage information.
No. Most foodborne pathogens do not grow below approximately 0.85 aw, but other organisms such as yeasts and moulds may tolerate lower water activity. Product-specific hazards and validated food-safety requirements must still be considered.
The standard PCE-WAM 10 package includes three sample trays.
PCE specifies an internal sample-tray diameter of approximately 33 mm.
PCE's current standard product specifications do not list onboard result memory as a standard PCE-WAM 10 feature.
The operating instructions document optional USB and Bluetooth data output. These are not listed in the standard delivery scope, so confirm the required interface configuration before ordering if computer connectivity is important.
No. It has an IP20 protection rating and should be protected from water, washdown and condensation.
The PCE-WAM 10 is the more economical entry-level model with ±0.03 aw published accuracy. The PCE-WAT 10 improves accuracy to ±0.02 aw, stores up to 99 measurements, provides better temperature accuracy and includes five sample dishes.
Cambridge Environmental Products supplies the PCE-WAM 10 Water Activity Meter in Canada along with water activity standards and higher-performance aw meters for food and beverage, agriculture, research and laboratory QA/QC applications.
Cambridge Environmental Products supplies water activity meters, standards, sample consumables and related QA/QC equipment across Canada.
If you are unsure whether the PCE-WAM 10 provides enough accuracy for your application, send us your sample type, expected aw range, number of tests, required accuracy and whether the meter is being used for routine QA/QC, R&D or a validated method.
The PCE-WAM 10 is a practical entry-level choice for straightforward water activity measurements where 0.01 aw resolution and ±0.03 aw accuracy meet the application's requirements.
If you need tighter accuracy, onboard result storage, higher resolution, multi-point calibration or more advanced data management, Cambridge can help compare the PCE-WAM 10 with the PCE-WAT 10 and other available water activity systems.
