
4- and 12-Channel Portable
Thermometer/Data Loggers
with SD Card Data Recorder
RDXL4SD
$
300
 SD Card, Real-Time 
Data Logger
 Input Signals: T/C K, J, T,
E, R/S, and RTD Pt100 Ω 
Measurement (RDXL4SD 
Only)
 Display All Input
Channels Simultaneously
 Data Hold, Record Max
and Min Reading
 RS232/USB PC 
Computer Interface
 LCD with Green 
Light Backlight, 
Easy Reading
 SD Card Capacity: 
1 to 16 GB
RDXL12SD 
$
1000
The portable RDXL4SD and 
RDXL12SD models are 
handheld thermometer/data 
loggers with backlight display 
and built-in analysis functions. 
The data loggers are powered 
by an internal battery and are 
capable of sampling, 
processing and displaying 
measurements without being 
connected to a computer. With 
their high resolution and fast 
analog to digital converter 
(ADC), the RDXL4SD and 
RDXL12SD meet the majority 
of data logging requirements in 
most industrial applications.
Real-time SD memory card 
data logger, built-in clock and 
calendar, real time data 
recorder, and sampling time 
set from 1 to 3600 seconds 
comes standard. Data logger 
can log data manually by setting 
the sampling time to zero. These 
real-time data loggers, save the 
4- or 12-channels temperature
RDXL4SD with 4 Type K 
thermocouples and 2GB SD 
memory card (included), $300.
S-1
RDXL12SD with 12 Type K thermocouples
and 2GB SD memory card (included), $1000.
measuring data, along with the time 
information (year, month, date, 
minute, second) into the SD 
memory card and can down load to 
Excel. The end user can make any 
data or graphic analysis by 
themselves.
S

SPECIFICATIONS
Extended Warranty
Program
SM
Embedded Microcontroller:
Custom one-chip LSI device 
LCD Display: 82 x 61 mm 
(3.23 x 2.40") with green color backlight
4 Channels: T1, T2, T3, T4, T1-T2 
12 Channels: T1, T2, T3, T4, T5, T6,
T7, T8, T9, T10, T11 and T12. 
Sensor: Type J, K, T, E, R/S 
thermocouple probe Pt100 Ω (european 
curve) for RDXL4SD model only
Resolution: 0.1/1ºC or ºF 
Sampling Time: 1 to 3600 seconds 
Memory Card: SD memory card 
1 to 16 GB 
Offset Adjustment: Available for 
Type K, J, T, E, R/S and Pt100 Ω
Memory Recall: Max and min value 
Sampling Time of Display:
Approx 1 second 
Data Output: RS232/USB PC 
computer interface 
Power Off: Auto shut off saves battery
life or manual off by push button 
Operating Temperature: 0 to 50ºC
(32 to 122ºF) 
Operating Humidity: Less than 
85% RH 
Power Supply: Alkaline or heavy-duty
DC 1.5V battery (UM3, AA) x 6 “AA”, 
(RDXL4SD) or 8 “AA” (RDXL12SD)
Power Current: Approx DC 30 mA 
Weight: 489 g (1.08 lb) 
Dimensions: 177 H x 68 W x 45 mm D 
(7 x 2.7 x 1.9")
Electrical Specifications (23 ±5)ºC 
PT100 Ω (RTD)
Resolution Range Accuracy*
0.1ºC -199.9 to 850ºC ±(0.4% + 1ºC)
0.1ºF -327.0 to 999.9ºF ± (0.4% + 1.8ºF) 
1ºF 1000 to 1562ºF ± (0.4% + 2ºF)
Two input channels only.
Sensor Types
Sensor Type Resolution Range Accuracy*
0.1ºC -50.1 to -999.9ºC ±(0.4% + 1ºC) 
1ºC 1000 to 1300ºC  ±(0.4% + 1ºC)
0.1ºF    -58.1 to -999.9ºF    ±(0.4% + 1.8ºF) 
1ºF  1000 to 2372ºF ±(0.4% + 2ºF)
0.1ºC -50.1 to -999.9ºC  ±(0.4% + 1ºC) 
1ºC 1000 to 1150ºC  ±(0.4% + 1ºC)
0.1ºF    -58.1 to -999.9ºF    ±(0.4% + 1.8ºF) 
1ºF  1000 to 2102ºF ±(0.4% + 2ºF)
0.1ºC -50.1 to -400ºC  ±(0.4% + 1ºC)
0.1º F    -58.1 to -752ºF    ±(0.4% + 1.8ºF)
0.1ºC -50.1 to -900ºC  ±(0.4% + 1ºC)
0.1ºF    -58.1 to -999.9ºF    ±(0.4% + 1.8ºF) 
1ºF  1000 to 1652ºF ±(0.4% + 2ºF) 
1ºC 0 to 1500ºC  ±(0.4 % + 1ºC) 
1ºF  32 to 2732ºF ±(0.4 % + 2ºF)
Accuracy value is specified for the meter only at 23ºC (73.4ºF).
* 
OMEGACARESMextended warranty program 
is available for models shown on this page. 
Ask your sales representative for full details 
when placing an order. OMEGACARE 
covers parts, labor and equivalent loaners.
SM
Accessories
RDXL4SD comes complete with 4 beaded wire Type K thermocouples probe, 6 “AA” batteries, 2 GB SD memory card, soft carrying case and 
operator’s manual.
RDXL12SD comes complete with 12 beaded wire Type K thermocouples probe, 8 “AA” batteries, 2 GB SD memory card, hard carrying case 
and operator’s manual.
Ordering Example: RDXL12SD, 12 channel thermometer data logger, $1000. OCW-3, OMEGACARESMextends standard 1-year warranty to a 
total of 4 years ($250), $1000 + 250 = $1250.
AVAILABLE FOR FAST DELIVERY!
To Order (Specify Model Number)
Model No. Price Description 
RDXL4SD $300 4-channel digital thermometer with 2 GB SD card 
RDXL12SD 1000 12-channel thermometer with 2 GB SD card
Model No. Price Description 
RDXLSD-CONN $6 RTD connector for RDXL4SD
SW-U101-WIN 99 Software for data logging and SD meters, with USB and RS232 cables 
HC-SD 30 Hard case for RDXL4SD 
ADAPTER-SD 20 AC adaptor 
USB-SD 65 Spare USB cable 
RS232-SD 25 Spare RS232 cable 
2GB-SD 10 Spare 2 GB SD card
S-2

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