Fluke 721A
The Fluke 721A Precision Pressure Calibrator is a rugged, reliable, and highly accurate pressure calibrator for process applications. It features dual isolated pressure sensors for simultaneous static and differential pressure measurement. Ideal for gas custody transfer applications.
- Model
- Fluke 721A
- Calibration
- Available on request
- Price
- $1,800
- Status
- In stock
- RFQ ref
- 721A
This unit
The Fluke 721A Lead Compensator is a precision instrument that eliminates measurement errors in voltage-divider circuits caused by lead and contact resistance. By equalizing voltage drops across parallel resistive dividers, it delivers the accuracy demanded in high-precision metrology applications. The 721A functions as an operational accessory for high-accuracy voltage dividers including the Fluke 720A and 725A models, where even small resistance-induced errors compromise results.
Technical Specifications
Resistance compensation resolution: 0.1 mΩ
Maximum divider resistance ratio: 4000:1
Maximum allowable lead resistance: 150 mΩ
Maximum divider voltage: 1500 V DC or peak AC
Fine control: 10-turn, 150 mΩ slide-wire potentiometer
Coarse control: 18-position rotary switch
Binding posts: Gold-plated copper
Voltage switch: Grounds input voltage terminals for thermal voltage compensation
Key Features
Two-stage compensation network - coarse adjustment via rotary switch for rapid zeroing, fine adjustment via precision potentiometer for exact nulling.
0.1 mΩ resolution enables compensation of minute contact and lead resistances that would otherwise degrade divider accuracy.
Supports divider resistance ratios up to 4000:1, accommodating diverse measurement configurations.
Gold-plated binding posts ensure low-resistance connections and long-term reliability in precision circuits.
Integrated voltage switch permits compensation of thermal EMF without disconnecting the divider.
Physical Specifications
Height: 8.8 cm (3.5 inches)
Width: 48.2 cm (19 inches)
Depth: 15.2 cm (6 inches)
Weight: 2.72 kg (6 lb)
Typical Applications The 721A is essential in precision voltage measurement and calibration work where contact and lead resistance introduce unacceptable errors. It is particularly suited for high-accuracy metrology requiring milliohm-level compensation and measurements at elevated voltages up to 1500 V.
Compatibility & Integration Designed specifically as an operational accessory for the Fluke 720A and 725A high-accuracy voltage dividers.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 1500 V DC or peak AC |
Fluke 721A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Fluke 721A. All calibrations are performed to NIST-traceable standards and ship with a certificate. Turnaround is typically 1–3 business days after receipt.
Fluke 721A price
This Fluke 721A is listed at $1,800. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Fluke 721A calibration cost
NIST-traceable calibration for the Fluke 721A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Turnaround is 1 to 3 business days after receipt. See full calibration details →
