Defender Specifications Defender 510 Defender 520 Defender 530
Model & Flow Ranges 510L, 5 -500 ccm 520L, 5 -500 ccm 530L, 5 -500 ccm
510M, 50-5,000 ccm 520M, 50-5,000 ccm 530M, 50-5,000 ccm
510H, 300-30,000 ccm 520H, 300-30,000 ccm 530H, 300-30,000 ccm
Accuracy Volumetric (% of reading) 1% 1% 1%
Accuracy Standardized (% of reading) N/A No 1.2%
Gas Compatibility – Non-corrosive, non-condensing, non-combustible gases. Less than 70% humidity. Yes Yes Yes
Flow Modes – Pressure or Suction Yes Yes Yes
Temperature and Pressure Sensors – In the flow stream No Yes Yes
Pressure Accuracy – +/- 3.5 mmHg (typical), 7.0 mm (max); No Yes Yes
Temperature Accuracy – +/- 0.8° C (typical), 1.3° C (max) No Yes Yes
Volumetric Flow – mL/min   L/min   cc/min   cf/min Yes Yes Yes
Standard Flow – smL/min   sL/min   sccm   scf/min No No Yes
Pressure – mmHg   PSI   kPa No Yes Yes
Temperature – ºC   ºF No Yes Yes
Reading Styles: Single (manual), Continous or Burst with averaging function user-selectable from 1 to 100 measurements Yes Yes Yes
Approximate Time Per Reading: – 1-15 seconds Yes Yes Yes
AC Adapter/Charger: – 12V DC, >250ma, 2.5 mm, center positive Yes Yes Yes
Battery System: – 6V rechargeable, sealed lead-acid, 6–8 hrs typical operation Yes Yes Yes
Battery Operational Time (5 cycles/min): – 3 hrs backlight on, 8 hrs backlight off Yes Yes Yes
Pressure and Suction Fittings: – ¼” ID Swagelok® compression fittings Yes Yes Yes
Storage Temperature: – 0–-70° C Yes Yes Yes
Operating Pressure (Absolute): – 15 PSI Yes Yes Yes
Operating Temperature – 0-50° C Yes Yes Yes
Display: – Backlit graphical LCD Yes Yes Yes
Data Port (for use with Optimizer software): – Serial (RS-232) Yes Yes Yes
Data Cable (for use with Optimizer software): – 1 meter (Definer Data Port to PC serial port) Yes Yes Yes
Size – Small enough to fit easily in your hand; slim enough to slide into a briefcase or tote Yes Yes Yes
Weight – 29 oz / 820 g Yes Yes Yes
Dimensions (H x W x D) – 5.5 x 6 x 3 in / 140 x 150 x 75 mm Yes Yes Yes
Protective Case: – Soft side or Pelican case available Yes Yes Yes
RoHS compliant Yes Yes Yes
CE compliant Yes Yes Yes
Warranty: – 1 year; battery 6 months Yes Yes Yes
Calibration Turnaround Time – 2 weeks (expedited for an additional fee) Yes Yes Yes