The Sherwood Model 420Cs Flame Photometer is the latest advancement in Sherwood’s trusted line of flame photometers. Building on the proven performance of the Model 420, this upgraded version offers exceptional precision (%CV ≤ 0.5) across all Dual Channel models—including the Model 420 and Model 425.

The Model 420Cs introduces a Caesium (Cs) reference channel, allowing analysts to choose between Caesium or Lithium as an internal reference standard. This enhanced flexibility ensures compatibility with various sample matrices and legacy analytical procedures, such as those designed for the discontinued IL 943 Flame Photometer.

Engineered for accuracy, safety, and ease of use, the Model 420Cs is ideal for clinical, research, and industrial laboratories that demand precise measurement of sodium (Na), potassium (K), and lithium (Li) concentrations.

Key Features & Benefits

• Dual Channel Measurement: Simultaneous analysis of two elements — Sodium, Potassium, and/or Lithium.

• Caesium or Lithium Reference Channel: Choose the most suitable internal reference for your application.

• High Precision: Achieve a coefficient of variation (CV) ≤ 0.5 for reliable results.

• Smart Firmware: Onboard blanking, calibration, and sample routines streamline operation.

• Linearized Sodium Response: Optimized for clinical sodium concentrations (1:200 sample dilution).

• Enhanced Safety: Optical flame detection, low air pressure monitoring, and automatic fuel gas shutoff.

• Automatic Flame Control: Automatic ignition and flame optimization for consistent performance.

• User-Friendly Design: Tool-free access to the burner assembly and mixing chamber for easy maintenance.

• Dual Digital Displays: Independent readouts for calibration and analysis per channel.

• Data Connectivity: RS232 interface for printer or data system integration; analogue outputs for chart recorders and online analyzers.

Applications

• Clinical chemistry laboratories

• Pharmaceutical testing

• Industrial and environmental analysis

• Research and academic institutions

Why Choose the Sherwood Model 420Cs?

The Model 420Cs delivers superior analytical flexibility, reliable dual-element detection, and cutting-edge precision in a compact, user-friendly design. Whether upgrading from older flame photometers or setting up a new laboratory workflow, this instrument ensures consistent, high-quality results across a range of applications.