Model GL840-M with 60-V Isolation (see 300-V version)

Handheld, 20- to 200-channel Data Logger (replaces the GL820 data logger - view comparison)

Price: $2495.00  Qty: 
GL840 Data Logger
  • Includes a GL840-M data logger, an AC adapter, a 4GB SD memory card, an NIST-traceable calibration certificate, and software on CD
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  • 20 analog input channels, expandable to 200
    • Programmable per channel
    • ±20 mV to ±100 V over 12 ranges
    • Supports direct-connected thermocouples of any type
    • Supports direct-connected PT100/PT1000 RTDs
    • Full isolation per channel (60V; see 300V version)
  • 4 discrete input channels
    • Programmable as a group as logic or pulse inputs
    • Pulse inputs support counter or frequency inputs
  • 4 discrete alarm outputs
  • Optional WiFi wireless operation
  • Flexible triggering
  • Built-in, 7-inch color display
  • Built-in Web server operation for remote operations
  • Removable SD memory support up to 32 GB capacity - one (1) 4GB memory card included
  • Operates either stand-alone or PC-connected
  • PC-side software included
Graphtec to WinDaq file converterGBD to WDH
Graphtec to WinDaq High Resolution (GBD - to - WDH) File Conversion Utility (beta version). Learn more.
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Graphtec DownloadsGraphtec Downloads
Visit the Support Download page at Graphtec for software (takes you another site).
R250 Shunt ResistorR250 4-20 mA Current Loop Shunt Resistor
Precision 250 Ω resistor, 0.1%. Learn More about 4-20mA current loop data acquisition.
$1.29
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B-513 Graphtec Logic Alarm CableB-513
2-meter logic/alarm cable, bare tips.
$95.00
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B-514 Graphtec DC Power CableB-514
2-meter DC power cable, bare tips.
$60.00
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B-569 Graphtec Battery PackB-569
7.2V/2900mAh lithium battery pack.
$189.00
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B-530 Graphtec Humidity SensorB-530
3-meter humidity sensor with dedicated power connector. Learn More.
$425.00
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B-564 Input TerminalB-564
20-channel standard input terminal for GL840 data loggers. Please note: Use of one or more B-564 input terminals with the GL840-WV forces all channels to the low common mode voltage spec of 60V. Use model B-565 to maintain the 300V spec across all channels.
$443.00
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B-566 Extension BaseB-566
Extension terminal base for GL840 data loggers. Includes base usit, connection plate, and screws.
$223.00
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B-567-05 Extension CableB-567-05
50 cm extension terminal cable for GL840 data loggers.
$113.00
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B-567-20 Extension CableB-567-20
2 m extension terminal cable for GL840 data loggers.
$178.00
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B-568 Wifi CouplerB-568
Wireless communication option for GL240 and GL840 data loggers. 802.11/b/g/n. Required for use with GL100-WL Data Logger.
$195.00
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B-536US-840 Graphtec Carrying CaseB-536US-840-M
Carrying Case. Interior padding and rugged exterior for safe transportation of your 840-M data logger.
$295.00
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GLACP Graphtec AC Power SupplyGLACP
Spare AC power supply for GL220, GL240, GL820, GL840, and GL900 products
$165.00
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B-570 Graphtec DIN rail mounting adaptorB-570
DIN Rail Mounting Adaptor for models GL840-M and GL840-WV.
$245.00
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Wireless Logger and Sensors

GL100-WL Wireless Data LoggerGL100-WL
Wireless coupler for GL240 and GL840 Data Loggers. Connect GS series sensors to expand the measurement capability of your data logger. Learn More.
$295.00
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GS-TH Temperature and Humidity sensor.GS-TH
Temperature/Humidity sensor for GL100 Data Loggers. Measures -20 to 85 °C and 0 to 100% RH. May be directly connected to the GL840 Data Logger.
$135.00
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GS-3AT Acceleration and Temperature sensorGS-3AT
Acceleration/Temperature sensor for GL100 Data Loggers. Measures up to 10G and -10 to 50 °C. May be directly connected to the GL840 Data Logger.
$295.00
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GS-CO2 Carbon Dioxide sensorGS-CO2
Carbon dioxide (CO2) sensor for GL100 Data Loggers. Measures 0 to 9,999 ppm. May be directly connected to the GL840 Data Logger.
$415.00
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Illuminence and UV sensorGS-LXUV
Illuminence/Ultraviolet sensor for GL100 Data Loggers. Measures 0 to 200k lx and 0 to 30 mW /cm2. May be directly connected to the GL840 Data Logger.
$225.00
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Voltage and Temperature sensorGS-4VT
Voltage and Temperature sensor for GL100 Data Loggers. Programmable per channel. Supports K and J type thermocouples (K: -200 to 1370 °C; T: -200 to 400 °C). Measures 20, 50, 100, 200, 500 mV; 1, 2, 5, 10, 20, 50 V; 1-5 V (for 4-20 mA using 250 Ω shunt). May be directly connected to the GL840 Data Logger.
$425.00
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Thermistor temperature sensorGS-4TSR
Thermistor Temperature sensor for GL100 Data Loggers. Sensors include model GS-103AT-4P (-40 to 105 °C) or model GS-103JT-4P (-40 to 120 °C). May be directly connected to the GL840 Data Logger.
$195.00
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Thermistor temperature sensorGS-103AT-4P
Thermistor Temperature sensor connects to model GS-4TSR. Measures -40 to 105 °C.
$145.00
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Thermistor temperature sensorGS-103JT-4P
Thermistor Temperature sensor connects to model GS-4TSR. Ultrathin. Measures -40 to 120 °C.
$145.00
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AC Current sensorGS-DPA-AC
AC Current sensor for model GL100-WL data loggers. Three sensors available: GS-AC50A: 50 A AC current sensor; GS-AC100A: 100 A AC current sensor; GS-AC200A: 200 A AC current sensor. May be directly connected to the GL840 Data Logger.
$195.00
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AC Current sensorGS-AC50A
Clamp-on AC Current sensor for GS-DPA-AC. 50 A AC current.
$125.00
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AC Current sensorGS-AC100A
Clamp-on AC Current sensor for GS-DPA-AC. 100 A AC current.
$125.00
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AC Current sensorGS-AC200A
Clamp-on AC Current sensor for GS-DPA-AC. 200 A AC current.
$125.00
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Dual Port AdapterGS-DPA
Dual Port Adapter for GL100 or GL840 Data Loggers. Support dual connection with GS-TH, GS-LXUV, and GS-CO2 (other sensors are not supported).
$125.00
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Sensor Extension CableGS-EXC
1.5 meter extension cable for use between GL100-WL or GL840 data loggers and GS sensors.
$85.00
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DI-808 Voltage and Thermocouple Data Logger
  • Works with any smart device
  • TC, mV, V, pulse inputs
  • Advanced triggering functions
  • Alarm outputs with email/text alerts
  • Manage, receive and retrieve data from across the room, or the other side of the planet
$995.00
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GL240 Stand-alone USB data logger
  • 10 isolated analog/4 counter channels
  • Sample intervals from 10ms to 1 hour
  • ±20mV to ±100V programmable ranges
  • Supports TC measurements
  • Record to PC, USB drive, flash
  • Measure RH model B-530
$1095.00
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GL840 Stand-alone USB data logger
  • 20 isolated analog/4 counter channels
  • 300V common mode voltage
  • ±20mV to ±100V programmable ranges
  • Supports TC measurements
  • Record to PC, USB drive, flash
  • Measure RH with model B-530
$2945.00
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GL7000 Modular Stand-alone Data Logger
$2400.00
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GL900 Industrial Stand-alone USB data logger
  • 8 isolated analog channels
  • 10µs to 1 minute sample intervals
  • ±20mV to ±500V programmable ranges
  • Supports most TC types
  • Record to PC, USB drive, flash
  • Measure RH with the B-530 sensor
$4295.00
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MT100 Multifunction Stand-alone USB data logger
$3295.00
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