Inkless Recorder – CR4″

Inkless chart recorders from G-Tek is available in 4” and 6” chart size formats.

Part of G-Tek’s most popular series CR2010, they offer utmost reliability and versatility at an affordable price. Since the marking on the chart is through the pressurized needle, there is no need to worry about ink being exhausted or replacing the pen. Pressure sensitive papers are used instead of thermal papers to ensure that the marking is retained for longer period of time.

These 4” recorders are widely used in low-temperature equipment, blood banks, incubators and many more places. They come for RTD Pt-100 inputs, 4-20mA/ 0-1v process inputs. Standard chart speeds are 4Hr / 24Hr and 168Hr (7Day) per revolution.

These recorders are microcontroller based. Crystal controlled chart drive ensures the good chart speed accuracy. Stepper motors for both pen and chart drive ensures no lag and no backlash.

With a cutout of 138X138 mm and smallest depth, makes it very convenient to use. Transparent polycarbonate door makes the chart visible from distance. They come with a universal power supply as a standard feature. Other power supply inputs are also available.



  • 4” Chart Width.
  • Inkless Chart Recorder
  • Pressure Sensitive paper for long retention of data
  • Single Analog Input channel
  • Universal Power Supply 85-264 V AC, 47-63 Hz
  • Other power supply inputs on request
  • Battery Back up
  • Direct Input Standard Pt-100 sensor.
  • Process Input through 4-20mA / 0-20mA or 0-1V DC
  • 7 Day for chart rotation
  • Other chart rotation available on request


Model No CR2010 Series; 4″ recorder
Product Code* 15×00
Recording System
No. of Pens 1, Pressurized Needle
Pen Marking Continuous
Pen Response Time <5Sec (Full Scale)
Pen Resolution Stepper Motor Controlled better than 0.1% FSD
Overshoot None
Chart Speed 7 days/rev; 24Hr/Rev and 4H/Rev
Chart Calibrated Radius 1.3″ (approx. 34mm)
Chart Ranges Standard (Refer Table 2) / Customized Please specify
Display, Operator Panels and Input
Display Type None
Status Indicator Led
Panel Keys Front panel KB consisting of 2 keys for programming and calibration
Analog Input RTD PT-100 / 0-1 V / 4-20 mA / 0-20 mA (External shunt resistance of 50 Ohm 0.1%)
Sensor Type and Range Refer to Table 1
Scan Rate Continuous 1 reading per second
Input Impedance
RTD/ Volt > 20 MΩ
mA 50Ω Shunt External
CMRR >100 dB@ 50, 60 Hz at 3 Sample per Second
NMRR >50 dB@ 50, 60 Hz at 3 Samples per Second
Maximum Common Mode Voltage 5V AC
Isolation Channel – EARTH 1.5KV 1 minute
Isolation Channel – Channel NA
Input Protection 30V AC/DC max
Termination Non interchangeable, Removable Plugs
Transmitter Power Supply Non Isolated 15V DC; 30mA max, un protected
Temperature (Operation)5˚C to 45˚C
(Limiting) 0˚C to 50˚C
(Storage)-20˚C to 60˚C
Humidity (Operation) 10 to 80 % RH Non Condensing
(Storage) 5 to 90 % RH Non Condensing
Altitude <2000 meter



Power Requirement
Supply Voltage (Mains Operated) 85-265VAC 47-63Hz
Battery backup Yes
DC Adapter Operated Yes
Power 7W Max with Maximum Configuration
Fuse Type None
Battery Backup
Battery 12V 7Ah External Lead Acid battery
Battery Charger Yes
Battery Reverse Polarity Protected
Minimum Back up 24 Hrs.
Safety IEC 61010-1
EMI-EMC EN 61326-1 Class A
Pollution Degree II
Installation Category III
Vibration 2g Peak (10 Hz-150Hz)
Shock IEC61010-1
IP Rating IP50 (Door and Bezel only)
Overall Dimension
Dimension L x W x D (mm) 144x144x91
Panel Cutout (mm) (L x W) 138×138
Bezel (mm) 144×144


Table1: Sensor Type, Range, Accuracy and Max Error Specification


Input Type Valid Input Range Resolution Chart Accuracy Linearization Error (Max)
PT-100(RTD) -100 to +600˚C 2% +/- 0.5% FSD ±0.7˚C Max
mA 4-20 mA 2% +/- 0.5% FSD ± 0.1% Max
mA 0-20 mA 2% +/- 0.5% FSD ± 0.1% Max
Volt 0-1Volt 2% +/- 0.5% FSD ± 0.1% Max


Table 2 Standard Available Chart Ranges



Sr. No.








Part No.


Part Description

07 -10 to +32 7 Days 4” 200618 W4-1032PS
08 +32 to -10 7 Days 4” 303010 W432-10PS
20 Other Please Specify


** First value in the chart is at the center of the Chart.


Specification listed are for each of the modules that can be fitted. Refer to the order code for the exact modules fitted in your system.  Specifications for the modules that are not fitted, will not be applicable. Specifications are subject to change without notice.


1. Chart Pack of 100

Standard Available Chart Ranges and Their Part No.:

Sr. No. Range** Speed Size Part No. Part Description
7 +32 to -10 7days/rev 4” 200618 W434-10 PS#
8 -10 to +32 7days/rev 4” 303010 W4-10+34 PS#
20 Other Please Specify


** First value in the chart is at the center of the Chart.
# PS: Pressure Sensitive Chart


2. Panel Mount Clamps: (Available in Pair only)
Part No.: 210034


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