Choosing the right 4-20mA loop calibrator is essential for maintaining accurate process control in HVAC, industrial automation, and instrumentation. This guide highlights five reliable models, comparing their capabilities, ease of use, and built-in features to help you select a unit that fits your testing and calibration needs.
| Product | Brand | Output Range | Key Benefit |
|---|---|---|---|
| DTI-SG100+ Signal Generator Process Calibrator | DLTEREN | 4-20mA, 0-10V | Compact loop calibrator with versatile outputs |
| eC370T Volt mA Thermocouple Loop Calibrator | ennoLogic | 4-20mA, 0-20V, mV, Temp | Versatile generator and meter with hotkey programming |
| LB02 Resistance Current Voltmeter Source | T-king | 4-20mA, 0-10V, mV | Compact, updated model with protection features |
| iDili LB02 Multifunction Calibrator | iDili | 4-20mA, 0-10V, mV | Fuse-protected with internal switches |
| Fluke 789 ProcessMeter | Fluke | 4-20mA sourcing and measurement | Trusted brand with built-in 24 V loop supply |
DTI-SG100+ Signal Generator Process Calibrator
The DTI-SG100+ provides a compact solution for calibrating 4-20mA loops with a straightforward output capability. It supports 4-20mA and 0-10V signals, enabling quick testing of transmitters, controllers, and PLCs. Its palm-sized design makes it easy to carry between field and bench work, and the unit aligns with common industrial calibration workflows.
eC370T Volt mA Thermocouple Loop Calibrator
The ennoLogic eC370T combines voltage, current, thermocouple, and temperature signaling in a single calibrator and simulator. It supports 0-20V, 4-20mA, and temperature outputs across multiple thermocouple types, making it suitable for HVAC transmitters, PLC inputs, and temperature control loops. Its numeric keypad and hotkey programming streamline repetitive testing tasks, while a built-in 24V loop supply simplifies on-site measurements.
LB02 Resistance Current Voltmeter Source
The LB02 model from T-king is a compact process calibrator that handles multiple signal types, including 4-20mA and 0-10V. It emphasizes stability and reliability, with emphasis on precision components and protections to guard against common operator errors. It suits technicians who need a small, straightforward device for routine loop calibration.
iDili LB02 Multifunction Calibrator
The iDili LB02 provides multifunction capabilities with a focus on safety and durability. It includes a built-in fuse protection to guard against incorrect power insertion and uses internal switching for input and output. The device supports 4-20mA and 0-10V signals, making it suitable for calibration tasks in process control environments and PLC testing.
Fluke 789 ProcessMeter
The Fluke 789 ProcessMeter combines digital multimeter capabilities with 4-20mA sourcing and measurement, plus an integrated 24 V loop supply. It is designed for reliability in demanding environments and offers robust overload protection and a long-lasting battery life, making it a go-to choice for professionals who require both measurement and signal generation in one tool.
Jadeshay 4-20mA Two-Wire Generator
The Jadeshay 4-20mA generator offers a high-precision 4-20mA current output with an extended 3-21mA range and ±0.5% accuracy. It features a clear LCD display and a rotary encoder for smooth output adjustment. The unit supports linear output calibration to align with a connected device, making it useful for transmitter calibration, PLC testing, and general loop verification.
Buying Guide
- Output range and accuracy: Consider whether you need standard 4-20mA, extended ranges, or additional volt or mV outputs. Look for units with ±0.1% to ±0.5% accuracy depending on the application.
- Built-in loop supply: A built-in DC loop supply (commonly 24 V) simplifies field testing by powering transmitters directly from the calibrator.
- Protection and durability: Fuse protection, overload protection, and rugged housings are important for field use and 2-wire loop testing.
- Ease of use: Keypad or rotary encoder, clear displays, hotkeys, and intuitive menus save time during calibration tasks.
- Multi-signal capability: If you calibrate a variety of devices, a multifunction calibrator that handles voltage, current, thermocouples, and temperature can reduce device count.
- Display and data handling: A readable LCD or color display, plus the ability to store or recall test configurations, supports efficient troubleshooting.
- Portability and power: Battery life, weight, and a reliable power source influence performance for field technicians.
- Brand and support: Established brands with reputable support reduce downtime when equipment requires servicing or firmware updates.