The numbers below come from factory testing of the DOI‑E Series. Six models are listed. All share the same forced convection system and PID control. Temperature ranges differ by mode: incubator mode runs from room temperature plus 5°C up to 80°C, while drying oven mode runs from 80°C to 300°C.

Technical Specifications

Models and capacity

• Model numbers: MSDOI‑30ESWISS, MSDOI‑45ESWISS, MSDOI‑65ESWISS, MSDOI‑85ESWISS, MSDOI‑125ESWISS, MSDOI‑230ESWISS

• Capacity: 30L, 45L, 65L, 85L, 125L, 230L

• Circulation mode: forced convection (all models)

Internal dimensions (W × D × H) per model

• MSDOI‑30ESWISS: 310 × 310 × 310 mm

• MSDOI‑45ESWISS: 350 × 350 × 350 mm

• MSDOI‑65ESWISS: 400 × 360 × 450 mm

• MSDOI‑85ESWISS: 450 × 420 × 450 mm

• MSDOI‑125ESWISS: 500 × 450 × 550 mm

• MSDOI‑230ESWISS: 600 × 500 × 750 mm

External dimensions (W × D × H) per model

• MSDOI‑30ESWISS: 460 × 510 × 695 mm

• MSDOI‑45ESWISS: 500 × 550 × 735 mm

• MSDOI‑65ESWISS: 550 × 550 × 840 mm

• MSDOI‑85ESWISS: 590 × 610 × 830 mm

• MSDOI‑125ESWISS: 636 × 680 × 915 mm

• MSDOI‑230ESWISS: 730 × 680 × 1250 mm

Temperature performance

• Incubator mode range: RT+5°C to 80°C

• Drying oven mode range: 80°C to 300°C

• Temperature fluctuation: ±1°C

• Temperature resolution: 0.1°C

• Temperature uniformity (incubator mode): ±1.0°C

• Temperature uniformity (drying oven mode): ±2.5%

• Sensor type: PT100

Control and display

• Controller: PID (two‑section intelligent PID)

• Display: digital LED

• Timer range: 0 to 9999 minutes with timing wait function

Construction

• Inner chamber material: mirror stainless steel

• Outer body material: cold‑rolled steel with electrostatic spraying

• Door design: built‑in observation window, anti‑scalding handle

• Insulation material: high‑quality rock wool board with thickened insulation layer

• Shelves: disassemblable, freely adjustable up and down

• Standard shelves / maximum shelves:

• MSDOI‑30ESWISS: 2 / 5 shelves

• MSDOI‑45ESWISS: 2 / 6 shelves

• MSDOI‑65ESWISS: 2 / 8 shelves

• MSDOI‑85ESWISS: 2 / 8 shelves

• MSDOI‑125ESWISS: 2 / 11 shelves

• MSDOI‑230ESWISS: 2 / 17 shelves

• Test hole: Φ35 mm on top with test hole function

Sealing and energy efficiency

• Sealing material: new synthetic silicone (prevents heat loss)

• Automatic control parameter adjustment according to ambient temperature and load

Safety

• Over‑temperature control with visible and audible alarm

• Sensor deviation correction

• Temperature auto‑tuning

• Power‑off parameter memory

• Loop self‑diagnosis

Electrical

• Voltage / frequency: AC 220/110V, 50/60Hz

• Power consumption:

• MSDOI‑30ESWISS: 800W

• MSDOI‑45ESWISS: 1200W

• MSDOI‑65ESWISS: 1600W

• MSDOI‑85ESWISS: 2000W

• MSDOI‑125ESWISS: 2300W

• MSDOI‑230ESWISS: 3000W

Weight

• Net weight / gross weight:

• MSDOI‑30ESWISS: 33 / 42.5 kg

• MSDOI‑45ESWISS: 37 / 43 kg

• MSDOI‑65ESWISS: 44 / 49 kg

• MSDOI‑85ESWISS: 50 / 56 kg

• MSDOI‑125ESWISS: 60 / 66 kg

• MSDOI‑230ESWISS: 94 / 120 kg

Applications

Chemical industry, electronic communication, plastics, cables, electroplating, hardware, automobile, optoelectronics, rubber products, molds, spraying, printing, medical treatment, aerospace, universities and other industries.

Standard accessories

• Shelves (2 per unit)

• Test hole cover

• Power cord

• User manual

Optional accessories

• Spare shelves

• Additional shelf racks

Key benefits for your laboratory

The features listed above translate into measurable gains for daily lab operations. Each point below connects a specification to a practical outcome.

Two instruments in one bench footprint – A standard incubator covers only 5‑80°C. A standard drying oven covers only 80‑300°C. This unit does both. A laboratory working with microbiological cultures (incubation at 37°C) and glassware drying (150°C) uses the same machine. Bench space is cut in half.

Forced convection for consistent temperature across all shelves – Natural convection ovens develop hot spots at the top. The high‑quality fan motor circulates air continuously through the chamber. Samples on the bottom shelf receive the same heat as samples on the top shelf. Reproducibility improves across multiple runs.

PID two‑section control eliminates temperature overshoot – Basic thermostats overshoot the setpoint before settling. The intelligent PID controller adjusts heating output continuously. The chamber reaches 100°C and holds there without spiking to 110°C. Heat‑sensitive samples like biological media or polymer films are not damaged.

Thick rock wool insulation keeps heat inside – The chamber wall uses high‑quality rock wool board with a thickened insulation layer. Surface temperature remains low. Operators do not burn themselves on the outer body. The laboratory air conditioning does not fight against a radiating hot box.

Observation window without losing temperature – The built‑in window allows visual inspection of samples. The operator sees whether a culture has grown or a powder has dried without opening the door. No heat loss, no contamination risk, no interruption of the running cycle.

Simple button operation for fast protocol changes – Digital display with button operation. The user toggles between incubator mode and drying oven mode with a few presses. Temperature and timer are set in seconds. A technician switching between a 37°C incubation and a 150°C drying cycle completes both setups in under one minute.

Common frustrations with combined oven/incubator units – and how this series solves them

Pain point: Poor uniformity when switching between heating modes.
Some dual‑use units have different hot and cold spots depending on the set temperature. The MASTER SCIENCE DOI‑E Series drying oven incubator (a forced convection unit with a high‑quality fan motor) maintains the same air circulation pattern in both modes. Incubator mode uniformity holds at ±1.0°C. Drying oven mode uniformity holds at ±2.5%. A culture incubated at 37°C and then dried at 105°C sees the same chamber behaviour across both temperatures.

Pain point: Heat leaking out through the door seal wastes energy.
Rubber gaskets harden over time and allow heat to escape. The same MASTER SCIENCE DOI‑E Series drying oven incubator (with a new synthetic silicone sealing system) maintains a tight seal even after months of high‑temperature operation. The silicone material does not crack or deform at 300°C. Heat loss is prevented effectively. Electricity bills stay predictable.

Pain point: No way to monitor samples without opening the door.
Every door opening releases heat and disturbs the chamber environment. The MASTER SCIENCE DOI‑E Series drying oven incubator (featuring a built‑in observation window) lets the operator see the contents without breaking the seal. A quick glance confirms whether a sample has dried or a culture has changed colour. The timer continues running uninterrupted.

Pain point: Temperature overshoot ruins sensitive biological samples.
A 50°C overshoot in incubator mode kills cells or denatures proteins. The MASTER SCIENCE DOI‑E Series drying oven incubator (equipped with PID two‑temperature‑section intelligent control) ramps up gradually and stops exactly at the setpoint. The PT100 sensor provides real‑time feedback. Overshoot is measured in tenths of a degree, not tens of degrees.

Pain point: Programmed parameters are lost during a power outage.
A brief power flicker resets the temperature and timer on basic units. The MASTER SCIENCE DOI‑E Series drying oven incubator (with power‑off parameter memory) retains all settings. When power returns, the unit resumes the previous state. A 48‑hour stability test running when the power fails restarts automatically from the same setpoint and timer value.

Which laboratories choose the DOI‑E Series

Microbiology and cell culture laboratories use the incubator mode at 37°C for bacterial and yeast cultures. The forced convection prevents condensation inside the chamber. The observation window allows daily inspection without opening.

Pharmaceutical quality control laboratories use the drying oven mode for glassware sterilisation at 160‑180°C and for moisture content determination at 105°C. The 0‑9999 minute timer supports overnight drying runs.

Material science and polymer laboratories use both modes. Incubator mode conditions samples at 50‑80°C for humidity studies. Drying oven mode cures coatings and removes residual solvents at 150‑250°C.

Food and beverage testing laboratories use the drying oven mode for moisture analysis of grains, powders, and processed foods. The 0.1°C temperature resolution allows precise control for gravimetric methods.

Clinical diagnostic laboratories use the incubator mode for culture plates and the drying oven mode for decontamination of contaminated glassware. The compact 30L or 45L models fit on a standard bench. The 230L model processes large batches of tubes and flasks.

Academic research and teaching laboratories use the DOI‑E Series as a general‑purpose heating appliance. One unit serves multiple courses and research groups. The stainless steel inner chamber resists chemical spills and cleans easily with common lab wipes.

Physical installation and daily operation

Placement – The unit sits on a level, heat‑resistant bench. Allow 200‑300 mm clearance on all sides for ventilation. The 230L model requires a floor stand or reinforced bench due to its 94 kg net weight.

Power connection – The unit accepts AC 220V or 110V, 50/60Hz. Power consumption ranges from 800W (30L) to 3000W (230L). A dedicated circuit is recommended for larger models.

Setting up a run – Turn on the main power. The digital LED display lights up. Select incubator mode or drying oven mode using the mode button. Set the target temperature using the arrow keys. Set the timer (0‑9999 minutes) if needed. Press Start. The PID controller begins heating. The fan motor starts automatically. The display shows the current temperature and the setpoint simultaneously.

Changing modes – To switch from incubator to drying oven, allow the chamber to cool below 80°C first. The unit does not automatically cool; the operator must open the door or wait for passive cooling. Once below 80°C, select drying oven mode and set the new temperature.

Cleaning – Allow the unit to cool below 50°C. Remove the shelves. Wipe the mirror stainless steel inner chamber with a damp cloth and mild detergent. Dry thoroughly before the next use. The arc‑less design of the chamber corners prevents residue buildup.

Ordering information

Each DOI‑E Series unit ships with:

• Main oven/incubator chamber with forced convection system

• High‑quality fan motor (installed)

• PT100 temperature sensor (installed)

• PID controller with digital LED display

• Two stainless steel shelves (standard)

• Φ35 mm test hole cover

• New synthetic silicone door seal (installed)

• Power cord (country‑specific plug)

• User manual with calibration certificate

The customer must specify the following when ordering:

1. Model number 

2. Voltage (AC 220V or 110V, 50/60Hz)

3. Any optional accessories (spare shelves)

Optional accessories available:

• Additional stainless steel shelves

• Shelf racks (for maximum shelf configuration)

• Calibration certification with test data