SmartReader Plus 2 Data Logger

The SmartReader Plus 2 is a self-contained data logger that can monitor and record temperature and relative humidity - right out of the box. The on-board RH (Relative
Humidity) sensor is temperature compensated, permitting reliable, worry-free RH readings. For remote sensing of temperature and RH, simply attach ACR’s external temperature/RH probe, or for remote temperature sensing, attach up to two of ACR's thermistor probes.

Required with Temperature Data Logger
>> TrendReader 2 software

Required for Ethernet Connectivity 
>> TrendReader 2 Software with USB Cable Kit (#TR2-USB)
>> Read the Networking and Remote Communications Guide

NOTE: NIST Calibration is available.
Large Quantity Discounts Are Available!

SmartReader Plus 2 Logger Features

  • Very Lightweight
  • Can Record over 87,000 Readings
  • 4 Channels

SmartReader Plus 2 Logger Specifications

General Specifications
Channels Four (one for the internal temperature sensor, one for the internal RH sensor and two for remote measurements of temperature and RH [with ACR's EH-020A probe])
Memory 128 K (87,000 readings)
Size 107 x 74 x 22 mm. (4.2” x 2.9” x 0.9”)
Weight 110 grams (3.75 ounces)
Case Material Noryl Plastic
External Connector Removable screw-type terminal strip with Common (-) connection
Operating Limits -40°C to 70°C (-40°F to 158°F) and 0 to 95% Relative Humidity (non-condensing)
Clock Accuracy ±2 seconds per day
Battery 3.6 volt Lithium, 1 Amp-Hour
Battery Life 10 year warranty (under normal use), factory replaceable
Power Consumption 5 to 10 microamps (continuous)
Sampling Methods 1. Continuous (First-in, First-out – not available with sample rates faster than 8 seconds)
2. Stop when full (Fill-then-stop)
Sampling Rates User selectable rates from 25 per second to 1 reading every 8 hrs. (BP-101 Battery Pack or PS-201 Power Supply required for sample rates faster than 8 seconds)
Resolution 12 bit (1 part in 4,096)
Mounting Magnetic backing or locking eyelet
Software Compatiblity Windows 3.1, 95, 98, 2000, ME, NT, XP, Vista (32-bit), Windows 7 (32-bit and 64-bit)
Software Requirements TrendReader 2 Software and Interface Kit
Product Approvals Meets Part 15 for Digital Devices of the Code of Federal Regulations of the Federal Communications Commission (FCC). Meets radiated and conducted emission require ments for the Interference Causing Equipment Standard f or Digital Apparatus of Industry Canada (ICES-003). IEC801-2, 3, 4 and EN55011 covering ESD, RFI Immunity, EFT/Burst and Radiated Emissions respectively for the Commission of the European Communities (CE)
Resistance to X-Rays Tested for protection against a 160kV dose @ 5mA for 30 seconds (150mA-sec) @ 38 inches F.F.D. (about 100 times that of an airport x-ray machine). Tested for protection against Gamma Ray (equivalent to 0.137-1.38 mega volts) IR 192 - 28 curies @ 30 second exposure source to object distance 5”
Internal Temperature Sensor
Type Negative Temperature Coefficient Thermistor.
10,000 ohms @ 25°C (77°F)
Accuracy ± 0.2°C, over the range of 0 to 70°C (±0.3°F over the range of 32 to 158°F)
Range -40 to 70°C (-40 to 158°F)
Resolution 0.03°C (0.05°F) at 25°C (77°F). Better than 0.07°C (0.12°F) between -25°C (-13°F) and 70°C (158°F). Better than 0.13°C (0.23°F) between -40°C (-40°F) and -25°C (-13°F)
Internal Humidity Sensor
Type Capacitive thin polymer film
Range 0 to 95% RH (non-condensing)
Acccuracy ± 3% RH from 10 to 90% RH (-20 to 40°C [-4 to 104°F])
Resolution Better than 0.04% RH between 25 and 60% RH @ 25°C (77°F)
Environmental Conditions Like all relative humidity sensors, when exposed to contaminants and/or extreme environmental conditions, accuracy degradation could result. For maximum long term stability, sensor should not be exposed or subjected to organic solvents, corrosive agents (strong acids, SO2, H2SO4, Cl2, HCl, H2S, etc.), and strong bases (compounds with PH greater than 7). Dust settling on the sensor surface will not affect sensor performance except possibly to decrease the speed of response.

Description Part Number
SmartReader Plus 2 128 KB, 4-channels: temperature, RH and optional external temp and RH probes SRP-002-128K
Software Starter Kit - 1 Required
TrendReader 2 Software with RS-232 Cable (IC-101) and Manual for Smart Reader series TR2-RS232
TrendReader 2 Software with USB Interface Cable (IC-102) and Manual for Smart Reader series TR2-USB
TrendReader 2 Software CD Only (interface cable and manual not included), for SmartReader Plus, Smart Reader, IAQ and OWL Loggers TR2-Standard
External RH/Temp Probe
Remote relative humidity/temperature probe, range 10 to 90% RH, -20° to 40°C (-4° to 104°F) EH-020A
External Temperature Thermistor Probes
Low Temperature Penetration Probe, stainless steel, 3 1/2" probe w/handle. Thermistor type. Range: -60° to 55°C (-75° to 130°F). Length: 10' (3 meters) ET-004
Low Temperature Probe, stainless steel, 1 X 3/16" probe. Thermistor type. Range: -60° to 55° (-75° to 130°F). Length: 20' (6 meters) ET-004-GP
General Purpose Temperature Probe, stainless Steel, 1 X 3/16" probe. Thermistor type. Range: -35° to 95°C (-30° to 200°F). Length: 20' (6 meters) ET-016
Waterproof Temperature Probe, Stainless Steel, 1 X 3/16" probe. Thermistor type. Range: -40? to 105?C (-40? to 221?F). Length: 20' (6 meters) 35-0035
Stainless Steel, 1 X 3/16" probe. Thermistor type. Range: 10° to 170°C (50° to 335°F). Length: 20' (6 meters) ET-081
Oven Temperature Probe, stainless steel, 1 X 3/16" probe. Thermistor type. Range: 70° to 255°C (155° to 490°F). Length: 20' (6 meters) ET-086
Pipe Surface Temperature Probe, stainless steel, 1 X 3/16" probe. Thermistor type. Range: -35° to 95°C (-30° to 200°F). Length: 20' (6 meters) ET-016-SMP
Standard NIST Calibration Service
Standard NIST Temperature Calibration (1 Point) Note: 3 to 5 Day Lead Time for All Calibration Orders CAL-NIST-TEMP
Standard NIST Temp/RH Calibration (1 Point) Note: 3 to 5 Day Lead Time for All Calibration Orders CAL-NIST-RH
Optional Accessories
Fast Sampling Battery Pack BP-101
Network/Fast Sampling Power Supply - 120V - North American Version PS-201-NA
Network/Fast Sampling Power Supply - 220V - European Version PS-201-EU
Extra RS-232 Interface Cable for SmartReader, SmartReader Plus and Nautilus loggers IC-101
USB Serial Adapter CABLE-USB232

Fast Sampling with Battery Pack or External 120 Volt Power Supply
For sampling rates faster than once every 8 seconds, the Smart Reader Plus data loggers require the use of an external 120 volt power supply (#PS-201) or fast sampling battery pack (#BP-101).

The fast sampling battery pack has replaceable "AAA" batteries and 8" (20cm) cable attached, with a male stereo jack on the end. The stereo jack is plugged into the communication port on the Smart Reader Plus data logger.
The 120 Volt Power Supply is required when network length is greater than 50' , more than 3 loggers are on the network, or for sampling rates greater than 8 seconds on the SmartReader Plus Loggers.