Replacement Filters for Ductless Hoods

HEMCO replacement ductless filters help keep ductless hoods and filtered workstations operating safely and effectively. Use the filter list below to find replacement filters by part number, description, or associated hood model.

For best performance, filters should be replaced according to usage, chemical exposure, and application requirements. Always confirm filter compatibility with your hood model before ordering.

Airflow Monitoring Systems

Airflow monitors are designed to track face velocity and pressure conditions within fume hoods. When airflow falls below a calibrated set point, the system activates alarms to notify laboratory personnel of potentially unsafe conditions.

Airflow Monitor Velocity Alarm

The HEMCO Airflow Monitor Velocity Alarm provides accurate, reliable face velocity monitoring to help ensure a safe operating environment for laboratory personnel. Designed for use on all types of fume hoods, it combines an ultra-sensitive micro-bridge airflow sensor with high-resolution digital processing for precise, repeatable measurement.

Features:

Continuous face velocity monitoring
Audible alarm with mute function
Red and green LED status indicators
Programmable alarm set point
High accuracy and repeatability

Cat. No. 51403

Analog Air Flow Monitor

The analog airflow monitor is designed for applications where airflow velocity indication is not required but safety monitoring is essential.

Features:

Visual LED indicators for airflow status
Audible alarm for low airflow conditions
Night setback function
Remote or built-in airflow sensor
Relay outputs for system integration

Cat. No. 51409

Digital Air Flow Monitor

The digital airflow monitor provides advanced monitoring with a backlit display and configurable system settings for enhanced control and diagnostics.

Features:

Displays airflow velocity or status (Air Safe / Air Fail) Audible and visual alarm system
Configurable relay outputs
Password-protected setup and calibration
Communication ports for diagnostics and system integration

Cat. No. 51410

Gauges and Monitoring Devices

Minihelic Gauge

Gauge monitors the pressure across the HEPA filter. Gauge conveniently mounts on the fume hood or on the filter housing. Measure range is from 0 to 2.0” wg. Gauge is 3” dia. accurate within 5%.

Cat. No. 51300

Digitalized Gauge

Series DH3 Gauge allows selection of pressure,velocity, or volumetric flow operation. Programming is easy using menu keys to access 5 menus which provide access to security level, selection of pressure, velocity of flow operation, and selection of engineering units. Gauge is 3” dia.

Cat. No. 51303

How It Works

Airflow monitors measure airflow by drawing a small sample of air through an internal sensor. The measured airflow is proportional to fume hood face velocity. If airflow drops below the programmed set point, the system activates an alarm, including audible alerts and visual indicators, to warn users of unsafe conditions.

Applications

Airflow monitoring systems are used in laboratories, research facilities, educational institutions, and industrial environments where maintaining safe airflow conditions is critical to protecting personnel and ensuring compliance with safety standards.

Start Your Next Project Today

Contact HEMCO to select the appropriate airflow monitoring system for your laboratory. Our team can assist with configuration, installation requirements, and system integration.