Omega Products LMF-3550-120 User Manual

BENCHTOP MUFFLE FURNACE

LMF Series

Cabinet Constructed

of 16-Gage Steel with

Baked Epoxy Finish.

U 550 in3

Muffle Chamber

U 1100°C (2012°F)

Maximum Operating
Temperature

U Automatic and

Programmable Models

U Modern Fiber/Firebrick

Muffle Design

U 120 or 240V

LMF Series benchtop muffle
furnaces feature a 550 in3 chamber
with fiber insulation and firebrick
heating plates. The furnace cabinet
is constructed of 16‑gage steel with
a baked epoxy finish. A top exhaust
port allows gases to be vented, or
it can be plugged during operation.
Two temperature controller models
are available: automatic and
multistage programmable.
LMF Series furnaces are ideal
for heat‑treating applications,

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material research, and sample
ashing determinations in the
geological, metallurgical, and
wastewater treatment industries.
These furnaces are also used in
chemistry, physics, and engineering
laboratories.

The LMF‑A550 has an analog
pyrometer that displays
temperature, scaled in 50°
increments. Temperature is
adjusted via a large control dial,
scaled in 100° increments. The
controller repeatability is excellent.

The LMF‑3550 has a 3‑stage
programmable temperature
controller that stores up to
10 programs in memory. Any

LMF-A550/120
shown smaller
than actual size.

2 programs can be linked to create
a single 6‑stage program. One
program is dedicated to a single
setpoint that holds the setpoint
indefinitely. The delay cycle allows
the furnace to be set to its heating
cycle at a specific time on a future
date. The PID controller allows heat
increase or decrease rates to be
programmed into the cycle.

SM

2 Models:

3

Chamber.

550 in

LMF-3550 models feature digital display with
3-stage programmable temperature controller.

Automatic and

Programmable.

LMF-3550/120 shown
smaller than actual size.

Specifications

Cabinet Dimensions:

41 H x 40 W x 39 cm D
(16.0 x 15.7 x 15.3")

Cabinet Construction: 16‑gage steel
with baked epoxy finish

Chamber Size: 9.13 L (550 in
Chamber Dimensions:

18 H x 23 W x 23 cm D (7 x 9 x 9")
Electrical Requirements:

15 A @ 120V, 50/60 Hz;

7.5 A @ 240V, 50/60 Hz

Power Consumption: 1800 W
Watts to Maintain 1000°C: 1025 W
Operating Temp Range:

LMF-A550: 200 to 1100°C
(392 to 2012°F)
LMF-3550: 50 to 1100°C
(122 to 2012°F)

Air Circulation: Top exhaust port
Muffle: Fiber insulation with firebrick

heating plates

3

)

Analog prometer displays temperatures on
LMF-A550 models.

Heating and Cooling Times

Heating

°C °F Time (min)* °C °F Time (min)**

200 392 5 1000 1832 5
400 752 10 800 1472 25
600 1112 20 600 1112 55
800 1472 30 400 752 110
1000 1832 50 200 392 180
1100 2012 65 – – –

* Time to heat up from room temperature to indicated temperature with no load.
** Time to cool down from 1100°C (2012°F) to indicated temperature with no load.

To Order Visit omega.com/lmf for Pricing and Details

Model No. Volts Type kg (lb)

LMF-A550/120 100 to 125 Analog 23 (50)
LMF-A550/240 200 to 250 Analog 23 (50)
LMF-3550/120 100 to 125 Automatic 23 (50)
LMF-3550/240 200 to 250 Automatic 23 (50)

Comes complete with ceramic floor tray, power cord and operator’s manual.

Temperature

Cooling

Temperature

Controller Shipping Wt

Replacement Parts

Model No. Description

LMF-HP Heating plate (1 plate)
LMF-TRAY Ceramic floor tray
LMF-TC Thermocouple, Type K, 14 AWG, 48" L

Ordering Example: LMF-3550/120, 120V automatic control muffle furnace
LMF-TRAY, spare ceramic floor tray.

To Order, Call or Shop Online at omega.com

SM

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