HomeProcessingValves & Flowmeters › Casella Measurement Defender 510/520 Digital Flow Meters

Defender 510/520 Digital Flow Meters

Primary standard digital flow calibrator

Casella CEL are pleased to announce the arrival of the next generation of primary standard digital flow meters, the Defender 510 and 520.

The Defender 510 is the standard model. The Defender 520 offers enhanced facilities to record ambient temperature and pressure conditions during the calibration process for audit trail purposes. There are 3 variants of each model, covering flow ranges from 5 to 30,000ml/min.

Both models have improved design and operational features offering the user increased versatility in operation and data collection.

Key Features:

  Primary flow standard
  +/-1% volumetric accuracy
  Calibrated to ISO 17025 & NIST
  Easy to use, simple operation
  Large backlit graphical display
  User-defined flow units
  Rugged ergonomic case
  Single or average readings
  Integrated serial PC interface
  Recording and graphing software
  RoHS compliant

Data Sheet


The Optimizer 110 software (included), allows users to download real-time calibration data direct to PC. The data may be saved to other spreadsheets or programs - such as Excel, with no storage limitations.

Optimizer 120 upgrade (available at extra cost) creates a full sampling pump database, allowing entry of pump serial numbers, employee ID, record search, print pre & post calibration certificates, for audit trail purposes.

Casella Measurement is now known just as Casella.

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

Back To Last Page

Sampling Pumps & Dust Monitors

Apex 2 Personal Sampling Pump
CEL-712 Microdust Pro
Dust Detective
Guardian 2 Multi-Agent Monitoring Station
TUFF Personal Sampling Pumps

Sound Level Meters

CEL-120 Acoustic Calibrator
CEL-200 Series Digital Sound Level Meters
CEL-350 dBadge Series Personal Sound Exposure Meter
CEL-600 Series Digital Sound Level Meters
CEL-632 & CEL-633 Digital Sound Level Meters
Insight Data Management Software

Flow Meters

Defender 510/520 Digital Flow Meters


176000A Microdust Pro Dust Monitor
Apex Lite Personal Sampling Pump
Apex Personal Sampling Pumps
CEL-110 Acoustic Calibrator
CEL-450 and CEL-490 Sound Level Meters
CEL-621 Environmental Sound Level Meter
Microtherm Heat Stress WBGT

Want A Quotation?

Please fill out the following fields and we will e-mail you a quotation shortly.