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Panel Meters - Counters - Timers - Transmitters, 4-20 mA & Modbus - Ethernet - USB - RS485 - RS232

MAGNA Temperature Input Large Digit Displays

Available for Pt100 RTD or Thermocouple Input

MAGNA Series Large Digit Clocks & Timers


  • Choice of 2-1/4", 4", 6" or 8" digit heights, 4 digits.
  • Choice of normal or outside viewing brightness
  • Choice of panel mount, wall mount or suspension mount.
  • Choice of 95-264 Vac or 11-30 Vdc power.
  • Sealed to NEMA-4 (IP65).
  • Only 3.0" (75 mm) deep.
  • Driven by external Laureate 4-20 mA output transmitter
  • Includes dual 120 mA AC/DC solid state relays.

MAGNA large-digit temperature displays can be ordered for four RTD types (DIN Pt100, ANSI Pt100, Ni120 nickel RTD, Cu10 copper RTD) or for seven thermocouple types (J, K, T, E, N, R, S). Four red LED digits show temperatures in °C or °F with 1° or 0.1° resolution. Accuracy is excellent, as shown under Specifications.

Viewing distances up to 100 m (320 ft) are achieved with large digits for reading across a plant floor or an outdoor yard. Four digit heights are available as standard: 57 mm (2-1/4"), 102 mm (4.0"), 150 mm (5.9"), and 200 mm (7.9"). A rule of thumb is that viewing distance in feet is 40 times digit height in inches, or in metric terms, that viewing distance in meters is digit height in millimeters divided by 2. Segmented digits are used for normal brightness 2-1/4” and 4.0" digits. Individual 5 mm LED pixels are used for larger digits and for outdoor brightness versions.

The MAGNA temperature display includes a built-in 4-20 mA process signal conditioner board and an external Laureate temperature transmitter with a 4-20 mA process signal output.

Use of an external transmitter allows long 4-20 mA cable runs while keeping thermocouple or RTD leads short. The display unit and transmitter are sold as a calibrated system. Simply specify the probe type and the HI and LO temperature end points. Your main task will be to make the 4-20 mA two-wire cable connection.

Standard outputs that come with the Laureate transmitter in additon to the 4-20 mA analog output are two 120 mA solid state relays and a serial data output, which can be set to RS232 or RS485. These outputs do not need to be used.

The system can be reprogrammed by the user for other probe types and temperature ranges.

Environmental sealing to IP65 (NEMA-4X) is standard for the display unit. Electrical connections are via water-tight compression glands. Outdoor LED brightness is optional, as is a built-in heater for outdoor operation down to -25°C (-13°F). Mounting options are panel mount, wall mount or suspension mount.

Laurel QLS Quad Output Current Loop Splitter / Retransmitter

A Laureate RTD or thermocouple transmitter can be DIN rail mounted outside of the display housing.

Display Unit
Readout 4 red LED digits
Digit height 57 mm (2-1/4"), 102 mm (4.0"), 150 mm (5.9") or 200 mm (7.9")
Brightness Indoor or outdoor brightness as ordered.
  Five keypad adjustable brightness levels.
Input Signal 4-20 mA signal from external Laureate transmitter
Power (to display unit and external transmitter)
AC power (standard ) 100-240 Vac
DC power (optional) 11-30 Vdc
Max power consumption 30 VA
RTD Input (to external transmitter)
Calibration, Pt 100 DIN Per IEC 751 (ITS-90)
Calibration, Pt 100 ANSI NIST Monograph 126
Calibration, Ni 120 DIN 43760
Max error at 25°C, Pt100 ±0.04°C (±0.07°F) ±0.01% of reading
Span tempco ±0.003% of reading/°C
Zero tempco ±0.03 deg/deg
Provision for user calibration Multiplier of RTD resistance plus offset in degrees
Connection 2, 3 or 4-wire
Overvoltage protection 125 Vac
Open sensor indication 0 mA or > 20mA output, user selectable
Sensor lead resistance 2-wire, 10 mdeg/Ω/deg up to 10Ω
Tempco per conductor 3 & 4-wire, 10 mdeg/Ω/deg up to 100Ω
Alpha R at
R at top
of range
Range Conformity
Platinum 0.003850
100Ω 390.48Ω
at 850°C
196 µA -202°C to +850°C
-331°F to +1562°F
Platinum 0.003902
100Ω 394.36Ω
at 850°C
196 µA -202°C to +631°C
-331°F to +1168°F
Nickel 0.00672 120Ω 380.31Ω
at 260°C
196 µA -80°C to +260°C
-112°F to +500°F
Copper 0.00427 9.035Ω 19.116Ω
at 260°C
5.0 mA -100°C to +260°C
-148°F to +500°F
Thermocouple Input (to external transmitter)
Calibration NIST Monograph 125 (IPTS-68)
Overall error at 25°C ±0.01% of full span ± conformity error
Span tempco ±0.003% of reading/°C
Reference junct. accuracy 0.5°C, 10°C to 40°C
Input resistance 1 GΩ
Input current 100 pA
Max lead resistance 1 kΩ max for rated accuracy
Overvoltage protection 125 Vac
NMR at 50/60 Hz 80 dB plus selectable digital filter
CMR, DC-60 Hz 120 dB with 500 ohm imbalance
CMV, DC-60 Hz 250 Vac from power and earth grounds
TC Type Range Conformity Error
J -210°C to +760°C (-347°F to +1400°F) ±0.09°C (±0.16°F)
K -244°C to +1372°C (-408°F to +2501°F) ±0.1°C (±0.17°F)
T 0°C to +400°C (32°F to 752°F)
-257°C to 0°C (-430°F to +32°F)
±0.03°C (±0.05°F)
±0.2°C (±0.36°F)
E -240°C to +1000°C (-400°F to +1830°F) ±0.18°C (±0.32°F)
N -245°C to +1300°C (-410°F to +2370°F) ±0.10°C (±0.17°F)
R -45°C to +1768°C (-49°F to +3214°F) ±0.17°C (±0.31°F)
S -46°C to +1768°C (-51°F to +3214°F) ±0.12°C (±0.22°F)
Analog Output (from external transmitter)
Output levels 4-20 mA linearized to temperature
Output Isolation 16 bits (65,536 steps)
Output error ±0.02% of output span ± overall input error
Compliance at 20 mA 10V (0-500Ω load)
Output isolation 250V rms working, 2.3 kV rms per 1 minute test
Scaling Via PC, free Instrument Setup software, and cables CBL02 & CBL04
Step response time 100 ms
Relay Outputs (from external transmitter)
Relay type Two solid state relays, SPST, normally open, Form A
Load rating 120 mA at 140 Vac or 180 Vdc
Special features Actuate above or below setpoint, latching or non-latching, disabled
Setup Via PC and free Instrument Setup (IS) software
  Span hysteresis, split hysteresis, deviation band around setpoint
  Programmable output time delay, 1 to 128 readings
Storage temperature -20°C to +55°C
Operating temperature 0°C to 50°C, non-condensing.
  -25°C to 50°C, non-condensing, with MHTR AC heater option.
Sealing of display unit NEMA-4 (IP65) standard, all-round
Connections to display unit Via M12 compression glands
Mounting to display unit Wall mount, suspension mount or panel mount

Number of Digits & Case Dimensions

Display Format
Digit Height Case Width x Height
57 mm (2.2") 376 x 155 mm (14.8" x 6.1")
102 mm (4.0") 434 x 196 mm (17.1" x 7.7")
150 mm (5.9") 580 x 247 mm (22.8" x 9.7")
200 mm (7.9") 750 x 290 mm (29.5" x 11.4")
Case depth 75 mm (3.0")
Note:   Models with 57 mm (2.2") digits come with the larger 6-digit case.
For panel mount versions, add 18 mm (0.7") to case width and height for the bezel and
25 mm (1.0") for cable glands in back of the case.
For applications assistance, phone 714-434-6131 ext. 104, or email
Ordering Guide
MAGNA Temperature Input Large Digit Displays

Click on the radio buttons to build a standard model number with pricing (shown below the Ordering Guide). Prices are in US dollars and do not include shipping or duty charges (export sales). Please see our explanations and limitations applicable to pricing and online orders. Prices shown are in US Dollars and are Laurel's manufacturer's suggested retail price (MSRP) in the USA. Orders are processed manually, not directly by our shopping cart system. You don't have to supply credit card information when placing an online order.

North American Orders. Laurel does not sell factory-direct in the USA or Canada. Online sales orders are filled through distribution. During the ordering process, you will have the chance to select an authorized Laurel distributor, or you can ask Laurel to refer you to a distributor. The distributor will then contact you to quote shipping, tax and duty (where applicable), and arrange for payment.

International Orders. If your ship-to address indicates that you are outside of the USA or Canada and Laurel has a distributor in your country, we will forward your order to that distributor for follow-up. If Laurel does not have a distributor in your country, we will email you an order acknowledgment and a pro forma invoice which states the product price, shipping charges, and wire transfer information, which includes a $25 bank wire transfer fee.

Questions about your order? Please email your distributor or
MAGNA units are built to order. MAGNA orders are non-cancelable and non-returnable.

Customized large digit displays are available by special quotation:

  • LED colors green, blue, white,yellow (not just red).
  • Digit heights of 12", 16", 24" or 32" (not just4", 6" or 8").
  • 2 or 4 solid state relays (not just mechanical relays).
  • Stainless steel housing (for food processing and pharmaceutical industries).
  • Explosion-proof stainless steel housing rated for ATEX Zones 2 and 22 (equivalent to Class1 / Div 2).
  • Custom signs with different colors, with fixed captions, and with multiple numeric display windows.
   SKU  Descriptions Price
Display unit (Includes streaming RS485 input.)
M24 2" (57 mm) digit height, 4 digits. Display to $702
M44 4 inches (102 mm), 4 digits. Display to $1104
M64 6 inches (150 mm), 4 digits. Display to $1944
M84 8 inches (200 mm), 4 digits. Display to $2388
Signal Input (One required, select one.)
MTC Thermocouple input. Specify TC type (J,K,T,E,N,R,S) and °C or °F. $408
MRTD RTD input. Specify RTD type (Pt100, Ni120, Cu10) and °C or °F. $408
Analog output board (one optional for display unit)
None $0
MAO1 4-20 mA $114
MAO2 0-10V $114
MAO3 -10V to +10V $192
Relay output board (one optional for display unit)
None $0
MRL1 Two 2A, 250 Vac relays $96
MRL2 Four 2A, 250 Vac relays $126
Case and mounting (one required for display unit)
MT1 Panel mount, black NEMA-4 case $252
MT2 Wall mount, black NEMA-4 case $138
MT3 Suspension mount, black NEMA-4 case $138
Meter modifiying options (not shippable separately from display unit)
MRDLV Daylight viewing brightness for operation down to 0°C (32°F) instead of normal indoor brightness $210
MHTR Heater for outdoor operation down to -25°C (-13°F) $480
MPS2 11-30 Vdc power instead of normal 85-265 Vac power $138
UM Extra case width for 2 blank digits $72
Use UM for unit of Measure like ºC. Added at no charge with MHTR for M24 or M44.
Configured model number M24-MTC-MT2
Configured price per model $1248
Quantity 1
Extended price $1248
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