LR TECHNOLOGIES
 

Model ADP-21/31 Vacuum Drying Oven Series
0.35 / 1.0 cu. ft.

Bench top Vacuum Drying Ovens/ADP series ADP21/31
 

ADP21 / ADP31


The Model ADP-21 and ADP-31 Vacuum Drying Ovens greatly simplify the heating of samples at pressures below atmospheric. Both temperature set and readout are controlled and monitored digitally with a fast and accurate display of operating parameters. Significant features of the ADP-21/31 Vacuum Drying Ovens are as follows:
  • Precise control in a negative pressure environment. Microprocessor based three mode PID (Proportional Integral Derivative) with precise temperature control... 99% accuracy.
  • Microprocessor based safety circuit. The self-diagnostic function visually alerts users if the temperature sensor, triac or heater malfunctions.  At that time, the circuit heater will automatically turn off.  
  • Economical. ADP-21/31 is the answer when cost is a primary concern.
  • Oven lined with Type 304 Stainless Steel for ease of cleaning.
  • Valves permit inert gas purge as well as vacuum operation.
  • The LED provides fast and positive display of operating parameters. Both SET and MEASURE are controlled and monitored digitally. Purging with Nitrogen or Argon is facilitated with gas inlet valve.
  • The large observation window provides visual access to the sample, and the option of a right or left opening door compensates for any space limitation in your lab.  Both vacuum and purge valves are conveniently located on the top of the oven.
  • Maximum performance is backed by our 12 month warranty policy.
HiTEC® Controller
The HiTEC® Microprocessor Temperature Controller features compact and accurate control of temperature. The secondary parameter program list allows the user to open various features such as auto tuning of temperature for easy calibration, altering the proportional, integral and derivative parameters to alter the best temperature rising.
 
* Specifications

 

ADP-21

ADP-31

Performance

System

Vacuum drying by decompressed chamber direct heating

Operating temperature range

Room temp.+5 to 240°C

Operating pressure range

101 to 0.1 kPa (at absolute pressure)

Temp. control accuracy

±1.5°C (at 150°C)

Max. temp. reaching time

Approx. 70 min.

Approx. 100 min.

Components

Interior Material

Type 304 Stainless steel

Exterior Material

Cold rolled steel plate with baked-on melamine resin finish

Door

Single swing door

Heat insulating material

Rock wool

Heating method

Decompressed chamber direct heating

Heater

Mica heater, 0.68kW

Mica heater, 1.05kW

Vacuum gauge

Bourdon tube type, 101 to 0kPa (Gauge pressure)
Digital Vacuum Gauge Optiona (Please Inquire)

Observation window

Tempered glass (12 mm thickness) and polycarbonate resin plate

Controller

Temp. control method

PlD control by microprocessor

Temp. setting method

Digital setting with **key

Temp display method

Digital display

Safe Device

Safety countermeasures

Electric leakage breaker

Standard

Internal dimensions(W×D×Hmm)

200×250×200

300×300×300

External dimensions(W×D×Hmm)

427×447×535

527×499×639

Internal capacity

10 L

27 L

Shelf plate with standard load

Approx. 30 kg/piece

Approx. 30 kg/piece

Shelf rest step number

2 steps

3 steps

Shelf rest pitch

63mm

71mm

Vacuum port

18mm O.D.

Power source 50/60Hz

115V, single phase,
7A

115V, single phase,
11 A

Weight

Approx. 30 kg

Approx. 55 kg

Accessories

Shelf plate

stainless steel, 2 pcs

stainless steel, 3 pcs

Adaptor for vacuum hose

18mm O.D. 1 pc

Earth adaptor

1 pc

Optional Accessories

 

Additional shelf plate
FEATURES BENEFITS
Temperature Range: Ambient +5 to 240°C Satisfies most requirements
Chamber sizes in the range of 0.35 and 1.0 cu. ft.  Meets needs from laboratory to production
Wide surface, flat heater, embedded behind chamber wall for direct heating Excellent temperature uniformity and quick heat up
Microprocessor based PID control Accurate, reliable and less maintenance
Self-diagnostic safety monitor for thermocouple.  If malfunction occurs, heater is cut-off to prevent overheating.  Power switch with circuit breaker is shut off when spike is reached in over-current.  Thermal fuse is dual over heat prevention. Reliable and safe
LED display for SET/MEASURE Easy to read - more accurate settings
Large observation window with safety shield Clear view of interior and safeguards against breakage of window
Vacuum operating range of 760 (atmosphere) down to 0.1 torr (mmHg) Meets and/or exceeds customer's needs
Positive door catches and heat/chemical resistant silicone gasket for tight closure Vacuum loss per day - only 0.6 torr (mmHg)
Left and right opening door - user can easily change with just a screwdriver Due to limited space, customer has the option of a left or right opening door
Type 304 (18-8) Stainless Steel interior chamber and high heat conductive aluminum shelf Less bio-contaminants; less corrosion.
Easy maintenance.


 

Retrofits

These Ovens can be customized to meet your diverse requirements and applications.  A few examples of retrofits performed at our facility are:

  • Temperature Output Terminal

  • Temperature Recorder (24 hr / 7 day)

  • Vacuum Port

  • Digital Vacuum Gauge