Define Instruments

Define Instruments is a New Zealand owned and operated company that develops and manufactures a range of industrial instruments for measurement and control, including: panel meters, DIN rail controllers, transmitters, data loggers and more. Read more...

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Questions? Call one of our engineers at 1-800-884-4967.
Define Instruments Twin Link Point-to-Point Wireless System
Define Instruments Twin Link Point-to-Point Wireless System
P2P-I accepts 2 universal isolated analog inputs & transmits wirelessly to P2P-O which converts them to 4-20mA isolated analog outputs.
In Stock
$517.00
Define Instruments Zen IoT Gateway & Data Logger
Define Instruments Zen IoT Gateway & Data Logger
IoT edge processor with real-time OS, up to 22 inputs/40 inputs/outputs, 8 Isolated outputs, RS485 ModBus RTU master/slave interface.
Some Models in Stock
Starting at $823.77
Define Instruments Merlin Digital Indicator
Define Instruments Merlin Digital Indicator
Universal input panel meter with buttonless, 4-digit LED display that accepts universal AC/DC power supply and is UL listed.
Some Models in Stock
Starting at $192.00
Define Instruments Nimbus IoT Cloud Interface
Define Instruments Nimbus IoT Cloud Interface
2 4–20ma inputs (non-isolated), 4 digital inputs, direct wireless interface, optional RS485 ModBus RTU master/slave interface.
Some Models in Stock
Starting at $527.78
Define Instruments Zen Data Logger
Define Instruments Zen Data Logger
Flexible 16-channel control and monitoring station that logs data onto a 1GB micro SD card.
Some Models in Stock
Starting at $1,364.00
Define Instruments TM-2HL Temperature Transmitter
Define Instruments TM-2HL Temperature Transmitter
Non-isolated, loop powered transmitter that head mounts to an RTD probe and outputs a 4-20mA signal.
In Stock
$71.00
Define Instruments Javelin Isolated Transmitter
Define Instruments Javelin Isolated Transmitter
Slim, loop powered signal conditioner that converts a 2-wire universal input to a 4-20mA output, UL listed.
In Stock
$129.00
Define Instruments SLIM Isolator
Define Instruments SLIM Isolator
Up to 5 isolated channels for 4-20mA DC inputs and outputs, loop powered or optional active output.
Some Models in Stock
Starting at $94.00
Define Instruments TM-2HLI Temperature Transmitter
Define Instruments TM-2HLI Temperature Transmitter
Isolated, loop powered transmitter that head mounts to an RTD or thermocouple and outputs a 4-20mA signal.
In Stock
$121.00
Define Instruments SLIM-IS Isolated Signal Splitter
Define Instruments SLIM-IS Isolated Signal Splitter
24VDC auxiliary powered splitter receives a 4-20mA DC input signal, and provides two identical active 4-20mA output signals.
In Stock
$149.00
Define Instruments PRO-FLO200 Flow Rate Panel Meter
Define Instruments PRO-FLO200 Flow Rate Panel Meter
6-digit dual LED displays for flow rate & volume with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $376.00
Define Instruments TM-2DLI Isolated Transmitter
Define Instruments TM-2DLI Isolated Transmitter
Loop powered signal conditioner that converts a 2-wire universal input to a 4-20mA output.
In Stock
$142.00
Define Instruments Zen RTU Remote Terminal Unit
Define Instruments Zen RTU Remote Terminal Unit
16 channel monitoring & control station with choice of isolated or non-isolated inputs.
Some Models in Stock
Starting at $699.00
Define Instruments Sentry Trip Amplifier
Define Instruments Sentry Trip Amplifier
Accepts universal input signal types, offers two relay outputs for alarming, and optional 4-20mA output.
Some Models in Stock
Starting at $199.00
Define Instruments LD-PRC Panel Meter
Define Instruments LD-PRC Panel Meter
4-digit LED display that accepts DC current or DC voltage input, with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $188.00
Define Instruments TEX-TOTAL Flow Rate Panel Meter
Define Instruments TEX-TOTAL Flow Rate Panel Meter
6-digit display, monitors and totalizes the flow rate of transmitters with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $302.00
Define Instruments PRO-CTR Panel Meter
Define Instruments PRO-CTR Panel Meter
Single or dual display counter & batch process controller, accepts digital pulses & quadrature inputs with optional relay & analog outputs.
Some Models in Stock
Starting at $331.00
Define Instruments Zen RTU Mini Remote Terminal Unit
Define Instruments Zen RTU Mini Remote Terminal Unit
Compact DIN rail mount design, analog signal transmitter with 4 isolated universal inputs.
Some Models in Stock
Starting at $844.00
Define Instruments ACCS-420 AC Current Sensor
Define Instruments ACCS-420 AC Current Sensor
Loop powered unit measures and converts a high AC current signal into a 4-20mA DC signal.
Some Models in Stock
Starting at $60.00
Define Instruments TM-4DPI Isolated Transmitter
Define Instruments TM-4DPI Isolated Transmitter
User powered transmitter that accepts 4-wire universal input and generates a current or voltage output.
In Stock
$184.00
Define Instruments TEX-FLO10 Flow Rate Panel Meter
Define Instruments TEX-FLO10 Flow Rate Panel Meter
6-digit LED display dual totalizer with optional analog & relay outputs for on/off process control.
Some Models in Stock
Starting at $302.00
Define Instruments SC-WEI Load Cell Signal Conditioner
Define Instruments SC-WEI Load Cell Signal Conditioner
Isolated 4- or 6-wire strain gauge inputs & relay outputs for batching control, with optional analog output (4-20mA / 0-10V).
Some Models in Stock
Starting at $266.00
Define Instruments 24V Power Supply
Define Instruments 24V Power Supply
Powers up to ten 4-20mA, 2-wire loops with overload protection, low noise, and 2% accuracy in a DIN rail mount case.
In Stock
$85.00
Define Instruments LPI610 Surface Mount Display
Define Instruments LPI610 Surface Mount Display
4-20mA input, loop powered, 6-digit LCD display that is protected against reverse wiring and accidental 24V supply.
In Stock
$189.00
Define Instruments PRO-PRC Panel Meter
Define Instruments PRO-PRC Panel Meter
6-digit LED display with four 0- or 4-20mA process input channels & optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $412.00
Define Instruments PRO-WEI100 Load Cell Panel Meter
Define Instruments PRO-WEI100 Load Cell Panel Meter
6-digit LED display, accepts & displays load cell & strain gauge with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $390.00
Define Instruments ACCS-010 AC Current Sensor
Define Instruments ACCS-010 AC Current Sensor
Self powered unit measures and converts a high AC current signal into a 0 to 10VDC isolated output.
In Stock
$60.00
Define Instruments Multicom USB to Serial Converter
Define Instruments Multicom USB to Serial Converter
Converts universal USB to RS232, RS485, or RS422, can reconfigure with software download for RS232 to RS485 or RS422.
In Stock
$140.00
Define Instruments SD-50X Panel Mount Display
Define Instruments SD-50X Panel Mount Display
5-digit LCD indicator with °C, °F, or dummy zero in 6th position, loop powered by a 4-20mA input signal.
In Stock
$180.00
Define Instruments RIO-MOD-RTU Distributed I/O Station
Define Instruments RIO-MOD-RTU Distributed I/O Station
RTU slave device with 16 isolated realy outputs & 16 digital inputs for direct connection to Modbus master PLCs and SCADA systems.
In Stock
$355.00
Define Instruments OVP-100 Overvoltage Protector
Define Instruments OVP-100 Overvoltage Protector
Uses gas discharge tubes and transient voltage suppressors to protect instrumentation against power surges.
In Stock
$70.00
Define Instruments TEX-PRC Panel Meter
Define Instruments TEX-PRC Panel Meter
6-digit LED display scales in engineering units with optional analog & relay outputs for alarm & on/off process control.
Starting at $302.00
Define Instruments LD-UAC Panel Meter
Define Instruments LD-UAC Panel Meter
Large 4-digit LED display, accepts universal AC input, with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $188.00
Define Instruments TEX-CTR10 Panel Meter
Define Instruments TEX-CTR10 Panel Meter
6-digit LED display counter or rate indicator with optional 4-20mA analog output.
Some Models in Stock
Starting at $188.00
Define Instruments TEX-BAR Graph Panel Meter
Define Instruments TEX-BAR Graph Panel Meter
5-digit LED display with a 0 to 100% bar graph, current and voltage inputs, with optional analog & relay outputs for on/off process control.
Some Models in Stock
Starting at $344.00
Define Instruments PRO-RTD Panel Meter
Define Instruments PRO-RTD Panel Meter
6-digit LED display performs custom averaging calculations with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $412.00
Define Instruments TEX-DEW200 Panel Meter
Define Instruments TEX-DEW200 Panel Meter
Dual 6-digit display for RH & temperature RTD inputs with two 4-20mA outputs & optional relays for alarm & on/off process control.
Some Models in Stock
Starting at $453.00
Define Instruments PRO-TC Panel Meter
Define Instruments PRO-TC Panel Meter
6-digit LED display accepts up to 4 thermocouple inputs with optional analog & relay outputs for alarm & on/off process control.
Some Models in Stock
Starting at $412.00
Define Instruments Bridge Key Communications Kit
Define Instruments Bridge Key Communications Kit
PC connection to all USB-programmable Define Instruments, required for Zen, Javelin, Twin Link, Sentry, Merlin, Pathfinder & TM Series.
In Stock
$49.00
Define Instruments Cloud Data Plans (Annual Subscription)
Define Instruments Cloud Data Plans (Annual Subscription)
Wifi or LTE Cat M1 service plans available, 4.2Mb, 25Mb, 46Mb and 250Mb monthly plans available.
Starting at $0.00
Define Instruments Antenna Extension Cable
Define Instruments Antenna Extension Cable
30cm (approximately 1ft) cable separates antenna from point-to-point transmitter for mounting unit in an enclosure, negates FCC approval.
In Stock
$18.00
Define Instruments Monopole Antenna
Define Instruments Monopole Antenna
Replacement antenna for Define Instruments wireless models available in 3, 6, 8 or 9dBi.
Some Models in Stock
Starting at $8.00
Define Instruments HVA-1000 High Voltage Attenuator
Define Instruments HVA-1000 High Voltage Attenuator
Differential resistive attenuator that accepts a maximum of 1000VDC input and outputs a signal reduced by a factor of 1000.
In Stock
$38.00
Define Instruments Point-to-Point Wireless Repeater
Define Instruments Point-to-Point Wireless Repeater
Extends the wireless range of the Twin Link by relaying data between the input and output nodes.
In Stock
$204.00
Define Instruments FM1602 Remote Display
Define Instruments FM1602 Remote Display
Front mount LCD remote display for use with the Zen data logger.
In Stock
$180.00
Define Instruments WG-PSU Power Adapter
Define Instruments WG-PSU Power Adapter
Compatible with all Define Instruments wireless models.
Some Models in Stock
Starting at $21.00
Define Instruments ZEN-RIO Relay I/O Expansion
Define Instruments ZEN-RIO Relay I/O Expansion
Adds 16 relay outputs & 16 digital control inputs to the Zen data logger.
In Stock
$559.00
Define Instruments MC-DR Multicom DIN Rail Bracket
Define Instruments MC-DR Multicom DIN Rail Bracket
In Stock
$6.00
Define Instruments MC-WM Multicom Wall Mount Bracket
Define Instruments MC-WM Multicom Wall Mount Bracket
In Stock
$6.00
Define Instruments Multicom Power Adapter
Define Instruments Multicom Power Adapter
250VAC to 5VDC (1A) external power adapter with interchangeable multi-region plugs to USB connector.
$32.00