SmartDigest™ 20/40
(Block Digestion Systems)

The "Smart" Block Digestor

• 40 or 20 position block digestor
• Acid digests environmental and agricultural samples
• Increased efficiency for faster sample preparation
• Digestion procedures for total Kjeldahl Nitrogen and total Phosphorus

Components

Block Heater

• Continuous heating element
• Improved temperature uniformity
• Improved temperature stability
• Improved heat transfer

Smart Controller

• Large, easy to read LED display
• Simple keypad entries to set programming parameters
• 8 stages of temperature control
• 8 stages of dwell times
• Programmable rise rates for each temperature stage
• Flash memory - no battery required
• Digital PID (Proportional, integral, derivative) temperature control
• Delayed start
• End of run alarm
• Programmable high temperature cut-off
• Type J thermocouple
• Built in diagnostics

Additional Safety Features

• Open thermocouple detection
• Over temperature detection by microprocessor
• Redundant circuitry for over temperature protection
• Independent of microprocessor and Triac

Glassware and Accessories

Each SmartDigest 40/20 is supplied with a complete set (customer's choice) of one (1) of the following thick-walled digestion tubes that are calibrated for

75 ml. SmartDigest 40 (40 tubes)
100 ml. SmartDigest 40 (40 tubes)
250 ml. SmartDigest 20 (20 tubes)

Stand

The stand holds the tubes during the digestion process, dilution, washing, and transfer. Specifically designed side plates snap onto the stand to minimize temperature fluctuations from air drafts during digestion.

Retainer Plate

The retainer plate locks the tubes in position in the rack allowing the entire assembly to be turned upside down to facilitate cleaning.

Specifications

Physical

• Heating Unit: 66 lbs.
• Smart Controller: 9 lbs.

Dimensions

• Heating Unit: 8½"H x 13½"W x 20"D
• Smart Controller: 6 ¾"H x 6"W x 10"D

Temperature

• Control Range and Resolution: 50°C to 400°C in 1° increments
• Accuracy: +/- 2° in control range
• Amplitude at Set Point: Less than +/- 1°
• Repeatability: +/- 1°
• Stability: +/- 1°
• Ramp Rate: 4°C/minute

Electrical

• Operating Voltage: 208-240 VAC, 50-60 Hz
• Current: 12 Amps @220V
• Fusing for Heating Unit: Two 15 Amp fuses @250V
• Fusing for Smart Controller: Two 1 Amp fuses

The SmartDigest 40/20 and Smart Controller come with a two year warranty, excluding glassware.