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T: 514-354-2511
T: 1 800 463-4363
F: 514-354-6948
Data Logger | Four-Channel Pressure, Temperature and Relative Humidity Data Logger

Data Logger | Four-Channel Pressure, Temperature and Relative Humidity Data Logger

Product Code:SmartReader Plus 4

Need more Info? (514) 354-2511 - 1-800-463-4363

The SmartReader Plus 4 data logger provides easy monitoring and troubleshooting of pneumatic control systems. The unit is completely self-contained with a 1/4” quick-release pressure fitting to allow a fast and trouble-free connection. As an added bonus, the SmartReader Plus 4 also monitors temperature and relative humidity.


Performance tracking of pneumatically controlled valves; verifying thermostat and humidistats; monitoring sensitive shipments, etc.

General Specifications

Size 107mm x 74mm x 22mm (4.2” x 2.9” x 0.9”)
Weight 110 g (3.75 oz)
Case Material Noryl® Plastic
Battery 3.6 volt Lithium
Resolution 12-bit (1 part in 4096)
Mounting Magnetic backing or locking eyelet
Clock Accuracy ± 2 seconds per day
Sampling Methods Continuous (First-in First-out)*, Stop When Full (Fill-then-stop)
*Not available with sample rates faster than eight seconds.
Operating Limits -40°C to 70°C (-40°F to 158°F) and 0 to 95% RH (non-condensing)
PC Requirements Windows PC with at least one free USB or serial port (depending on interface)
Software Requirements TrendReader® 2 (Compatible with Windows XP SP3, Windows Vista SP2& Windows 7 (32 bit & 64 bit)
Memory Size
(2 memory sizes available)
32 KB (capable of storing up to 21,500 readings)
128 KB (capable of storing up to 87,000 readings)
Sampling Rates User selectable rates from 25 per second to once every eight hours (BP-101 battery pack or PS-201 power supply required for sampling rates faster than eight seconds)
Number of Channels Four (one internal sensor for ambient temperature, one for pressure, and two for optional remote relative humidity and temperature probe [model EH-020A])

Sensor Specifications

Internal Temperature Sensor
Type NTC Thermistor - 10,000 Ohm @ 25°C (77°F)
Range -40°C to 70°C (-40°F to 158°F)
Accuracy ±0.2°C over the range of 0°C to 70°C (± 0.3°F over the range of 32°F to 158°F)
Resolution 0.03°C (0.05°F) @ 25°C; better than 0.07°C (0.12°F) between -25°C and 70°C (-13°F and 158°F); better than 0.13°C (0.23°F) between -40°C and -25°C (-40°F and -13°F)
Pressure Sensor Ranges Resolution
0 to 10 inWC
(2.5 kPa) Gauge
0.006 inWC (1.5 Pa)
0 to 5 PSI
(30 kPa) Gauge
0.003 PSI (0.02 kPa)
0 to 30 PSI
(200 kPa) Absolute
0.015 PSI (0.1 kPa)
0 to 30 PSI
(200 kPa) Gauge
0.015 PSI (0.1 kPa)
0 to 100 PSI
(700 kPa) Absolute
0.05 psi (0.34 kPa)
0 to 100 PSI
(700 kPa) Gauge
0.05 psi (0.34 kPa)
0 to 150 PSI
(1000 kPa) Gauge
0.05 psi (0.34 kPa)
Calibrated Accuracy ±0.5% of full scale @ 25°C (77°F)

Ordering Information

Item Cat No.
SRP-004-010 01-0090
SRP-004-30A-128K 01-0116
SRP-004-010-128K 01-0120
SRP-004-100G 01-0095
SRP-004-5G 01-0091
SRP-004-100G-128K 01-0119
SRP-004-5G-128K 01-0115
SRP-004-100A 01-0094
SRP-004-30G 01-0093
SRP-004-100A-128K 01-0118
SRP-004-30G-128K 01-0117
SRP-004-150G 01-0097
SRP-004-30A 01-0092
SRP-004-150G-128K 01-0139

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