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Indoor Thermometer

Base Model

M120b indoor thermometer

M120 thermometer front view

M120 thermometer side view

M120 thermometer back view

M120 thermometer bottom view

M120 thermometer and stand shown together Shown with Thermometer Stand  Accessory

M120 thermometer switch settings

Our base model Indoor Thermometer is your silent partner that enables you keep an 'eye' on the temperature with its built-in indoor temperature sensor.  Ideal for large areas where visibility is paramount, such as control rooms, factory floors, laboratories and warehouses.  The M120b is the base controller and display for all our M120 Series thermometers and has two RJ9 ports for adding external temperature sensors when needed.  Install it on the wall, or place it on a countertop with the add on Thermometer Stand  accessory.  Designed to perform.  Built to last.

Angle & Distance for Superior Visibility

Wide
Viewing Angle
At 130° the visibility is nearly side to side.

Long
Viewing Distance
50ft (15m) will accommodate the length of even large rooms.

Superior
Coverage
These combined give you 84% coverage in a 50x50ft (15x15m) room.

 
Diagram showing visibility coverage is 84 percent
84% Coverage

M120b Indoor Thermometer Specifications

Display

Height 1.5in (38mm)
Four dual color LEDs...
~632nm λred
~570nm λgreen

Viewing Angle

130°

viewing Distance

50ft (15m)

Settings

12 Settings for over 2,000 display combinations

Temperature Scales

°C  °F  °K

Internal Range

 -20  <>    85  °C
   -4  <>  185  °F
253  <>  358  °K

Sensor Ports

Two RJ9 ports for adding external temperature probes

Precision

0.1° or 0°

Measurement Cycle

1 2 4 or 8 seconds

Power Consumption

35mA at 5V DC

Power Adapter

Input: 100-240VAC 0.4A 50/60Hz
Output: 5.0VDC at ~1000mA

Outer Case

High-strength 16-gauge stainless-steel (~1/16in, ~1.6mm)

Dimensions

7.25  x  5.25  x  1.375 in
185  x  133  x  35 mm
2.0lbs (0.915kg)

Manufactured

Made in USA

Overrated & Underused

Thermometer power switch

Overrated
Capacity
If our current draw is 35mA, then a 5Amp rated switch would be excellent.

Underused
Cycles
Our switch demands a lifetime of 3,000 cycles, so a switch with a 30,000 cycle lifetime is ideal.

Heavy Duty
Result
A high-strength, high-performance, product that produces superior results for decades.

Explore Possibilities

Set the thermometer display the way you prefer from 2,000+ possible combinations . . .

Temperature display showing 1/10ths precision
1/10ths, Fahrenheit scale, green.

Temperature display rounded to nearest degree
Rounded to the nearest degree.

Temperature display showing red color
Select red or green for the internal sensor.

Temperature display showing both sensors simultaneously
Or display two sensors when you
add an external temperature probe.

M120b Thermometer In Words . . .

Precise
Sensor accuracy +/- 0.25 °C, from -40 - 125 °C (+/- 0.5 °F from -40 - 257 °F).  Stability variance less than 0.01 °C/Year (0.02 °F/Year).  Indoor range -20 to 85 °C (-4 to 185 °F).

Hassle-Free
If you lose power, no matter, since the unit will immediately start again with all your settings when power is back.  When the ambient light changes in the room, the display immdiately adjusts it's brightness to match.

If you lose power, no matter, since the unit will immediately start again with all your settings when power is back.  Want it to display during power outages?  Just add our 5V USB Battery Backup to your order.  It functions as a mini UPS (uninterruptible power supply).

Robust
We carefully test and choose each component to last, to have the right feel, and or to emit the correct light wavelength.  From the metal case, internal board, trace widths, component mean time to failure, range and tolerances, to cycle tests, every part was carefully tested and selected.

And yes it has a physical on/off switch too, unheard of today.  Each M120b Thermometer is made in our USA factory.

Versatile
The M120 is controlled by 12 switch settings on the back, with a label identifying each switch.  Adjust colors, precision, temperature scales, display rate, single/dual display, scale indicators, and the heartbeat.

Set & Forget Design

Options DIP switch

Disciplined
Engineering
Designed so it can be set up once and then forgotten.

Low
Maintenance
No need to worry about replacing batteries, fixing settings after power glitches, or keeping manuals handy.

Great
Confidence
Peace of mind designed in.

Black thermometer with stand on rocks

Bottom air vent for internal temperature sensor

Printed circuit board angled

You can accidentially drive over your
TempEye° M120 and it will still
provide years of service!
— Steven W

Using only natural atoms,
the TempEye M120 meets the highest standards
for safe atom use.
— Frank W

Built to last
while still within your grasp,
the TempEye° M120.
— Chan W

You can accidentially drive over your
TempEye° M120 and it will still
provide years of service!
— Steven W

Using only natural atoms,
the TempEye M120 meets the highest standards
for safe atom use.
— Frank W

In the Box

12x10x8in (30x25x20cm)

  • M120 Thermometer
    Base controller with internal temperature sensor, ambient light sensor, 1.5-in high LED display, and 12 option switches providing 2,000+ different configurations
  • Power Cable
    USB type A to type A with a 3-foot (1-meter) length
  • Power Adapter
    With 100V-240V AC 0.4A 50/60Hz input and 5.0V DC at ~1000mA output
  • English Users Guide
    With installation instructions
  • Sheet Music
    Of the official TempEye° M120 Series jingle

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