Replacement Capacitive Sensor with Sample Cup - Water Activity Meter - Heathrow Scientific

Water Activity Meter Replacement Capacitive Sensor

The Heathrow Scientific 47001-SENSOR Replacement Capacitive Sensor restores full measurement capability to the Heathrow Scientific 47002 Water Activity Meter. This OEM sensor assembly includes a sample cup and delivers accurate aw readings across solids, powders, and liquids with the same ±0.01 aw accuracy as the original sensor shipped with the meter kit.

Engineered with a detachable design, each replacement sensor threads directly onto the meter body without tools or recalibration delays. For facilities running continuous quality control programs, keeping a spare sensor on hand eliminates instrument downtime during sensor replacement cycles.

Features and Benefits

Capacitive humidity sensing technology provides stable, repeatable water activity measurements without the maintenance requirements of chilled-mirror systems. The included sample cup threads securely to the sensor body, creating a sealed measurement chamber that prevents ambient humidity interference during testing.

Technical Specifications

Laboratory Applications

High-volume food testing labs and pharmaceutical QA departments that run dozens of daily aw measurements benefit from rotating between multiple sensors. While one sensor completes a stability test, technicians can load and begin testing on a second sensor — a workflow advantage unique to the Heathrow Scientific detachable sensor architecture.

Volume Discounts

LabSupplies.com offers below retail pricing with volume discounts available. As an authorized dealer, we ship directly from USA inventory.

Frequently Asked Questions

When should I replace my water activity meter sensor?

Replace the capacitive sensor when readings become inconsistent, calibration fails repeatedly, or the sensor no longer stabilizes within the expected measurement time. Heathrow Scientific recommends performing regular verification with calibration salts to monitor sensor health. A sensor that deviates more than ±0.02 aw from the reference value after calibration should be replaced.

Does this replacement sensor require calibration after installation?

Yes. After installing a new replacement capacitive sensor on the Heathrow Scientific 47002 Water Activity Meter, perform a 1- to 3-point calibration using the appropriate calibration salt standards before resuming sample testing. Calibration factors can be saved to a computer and reloaded when switching between sensors.

Is this sensor compatible with alcohol-containing samples?

This capacitive sensor is designed for non-volatile solids, powders, and liquids. For samples containing primary or secondary alcohols, use the Heathrow Scientific electrical resistance (alcohol) sensor instead. Using a capacitive sensor on volatile samples may damage the sensing element and void the warranty.