Measurement Guide

Not sure which data logger you need? Compare the capabilities of our data loggers using our comprehensive measurement guide.

ACR Systems Data Loggers are available to support a wide variety of measurements. Use the following table to compare the capabilities of our data loggers and determine the best product for your requirements.

Data Logger
Channels
Measurement Range
Resolution
Max. Readings
Temperature: Thermistor
SmartReader 1
2
-60 to 255 C (-76 to 491 F)
8
32767
SmartReader 8
8
-60 to 255 C (-76 to 491 F)
8
N/A
SmartReader Plus 1
2
-60 to 255 C (-76 to 491 F)
12
1048000
SmartReader Plus 8
8
-60 to 255 C (-76 to 491 F)
12
1048000
OWL 100
1
-40 to 70 C (-40 to 158 F)
8
32767
OWL 200
1
-40 to 70 C (-40 to 158 F)
8
32767
JR-1000
1
-40 to 85 C (-40 to 185 F)
7
32767
JR-1001
1
-40 to 85 C (-40 to 185 F)
8
32767
SmartButton
1
-40 to 85 C (-40 to 185 F)
8
2048
Temperature: Thermocouple
SmartReader 5
3
J, K, S, T thermocouple ranges
8
32767
SmartReader 6
7
J, K, S, T thermocouple ranges
8
32767
SmartReader Plus 5
3
E, J, K, S, T thermocouple ranges
12
87000
SmartReader Plus 6
8
E, J, K, S, T thermocouple ranges
12
1048000
Temperature: RTD
SmartReader Plus 10
4
-230 to 300 C (-385 to 572 F)
12
87000
Temperature: Waterproof
Nautilus85
1
-40 to 85 C (-40 to 185 F)
4
244800
Nautilus135
1
10 to 135 C (50 to 275 F)
8
244800
Relative Humidity
SmartReader 2
4
-40 to 70 C (-40 to 158 F), 0-95% RH
8
32767
SmartReader Plus 2
4
-40 to 70 C (-40 to 158 F), 0 to 95% RH
12
87000
TRH 1000
2
-40 to 70 C (-40 to 158 F) & 0-100% RH
8
65000
Electrical: Current & Voltage
SmartReader 3
4
50 or 60 Hz, 5 to 500 A (3000 A CT also available)
8
32767
SmartReader Plus 3
8
5 to 500 A (3000 A CT also available),
120 Vac or 480 Vac
12
104800
OWL 300
1
5, 25, 100, 250A or 10, 50, 250, 500A
(3000A CT also available)
8
32767
Electrical: Power Quality
PowerWatch 120V
1
100-120 Volt, Single Phase
N/A
4000
PowerWatch 220/240V
1
220-240 Volt, Single Phase
N/A
4000
Electrical: Pulse & Switch Contact
SmartReader 9
3
256 pulse/sample rate max.
8
32767
SmartReader Plus 9
4
4095 pulse/sample rate max.
12
87000
Pressure
SmartReader 4
5
0 to 5, 30, 100, 150 psi
8
32767
SmartReader Plus 4
4
0 to 5, 30, 100, 150 psi & 10" WC
12
87000
SmartReader Plus 4 LPD
2
0.5, 1, 2, 5, 10" WC
12
21500
Process Signal
SmartReader 7
8
2.5v, 5v, 10v, 25mA, 200mV
8
32767
SmartReader Plus 7
8
2.5v, 5v, 10v, 25mA, 200mV
12
104800
OWL 400
1
0-38.4 Vdc max.
8
32767
OWL 500
1
0-24 mA dc
8
32767
Carbon Dioxide & Other Gases
IAQ Logger
5
-40 to 70 C (-40 to 158 F) & 0-95% RH;
0-4000 ppm CO2
8
32767