For buyers seeking intrinsically safe pressure calibrators, this guide highlights reliable options suited to field calibration, hazardous-area work, and precise signaling in challenging environments. Each product is explained with who it’s best for, plus practical cautions. The top five selections below cover handheld pumps, multi-function calibrators, and dual-sensor models to support P/I transmitters, 4–20 mA loops, and absolute pressure checks. A quick summary table helps you compare ranges, key strengths, and ideal use cases at a glance.
| Product | Brand | Typical Use | Best For |
|---|---|---|---|
| Fluke 718Ex 300 Intrinsically Safe Pressure Calibrator | Fluke | Calibrating P/I transmitters | Best for portable, safe field calibration up to 300 psi |
| Sensokart SK-2300-P High Pressure Hand Pump Calibrator | Sensokart | Manual pressure generation and vacuum | Better for precise hand-adjusted pressure in the field |
| Fluke FLK-721EX-3650 Pressure Calibrator | Fluke | Two isolated pressure sensors | Best for multi-input display and 4–20 mA tests |
| Meriam MFT4010-19 Intrinsically Safe Calibrator Base Unit | Meriam | HART/CE support with intrinsic safety | Choose this if you need HART, strap, and intrinsic safety |
| Fluke 750PA4EX Intrinsically Safe Absolute Pressure Module | Fluke | 0–15 psia to 1 bar absolute ranges | Best for absolute pressure checks in safe areas |
Fluke 718Ex 300 Intrinsically Safe Pressure Calibrator
The Fluke 718Ex 300 is designed to calibrate P/I transmitters with a 300 psi (2068 kPa) range. It features an internal pressure sensor and a 1/8-inch NPT pressure fitting for straightforward connections. This model is best for technicians who need reliable, portable calibration in potentially hazardous zones. It is suitable for hands-on field calibrations where intrinsic safety and simple operation matter most.
Best for: Field technicians who require a compact, intrinsically safe calibrator for up to 300 psi. Limitations: OL (overload) can appear at higher pressures, so operate within the stated range and verify connections before use.
Sensokart SK-2300-P High Pressure Hand Pump Calibrator
The SK-2300-P offers dual sources of pneumatic pressure and vacuum, with a built-in fine-adjust vernier and a needle valve for controlled releases. It includes a vacuum/pressure selector valve, ergonomic handles, and adjustable stroke. With a range up to 600 Kg/Cm², this unit is ideal for field labs needing manual, precise pressure generation in hazardous environments. It is best for: technicians who rely on a robust, hand-operated calibrator with flexible pressure-generation options.
Limitation: Data notes water/oil compatibility and stainless construction; ensure fluids are compatible with the testing media used in your calibrations.
Fluke FLK-721EX-3650 Pressure Calibrator
This model uses two isolated stainless steel pressure sensors with 0.025% accuracy and measures 4 to 20 mA signals. The large, backlit display can simultaneously show up to three inputs, aiding quick cross-checks in field calibrations. It is best for: technicians performing multi-signal calibration in dim or outdoor sites where clear visibility matters. Caution: ensure the system remains within the sensor compatibility and avoid overloading the device beyond its rated accuracy range.
Meriam MFT4010-19 Intrinsically Safe Calibrator Base Unit
The Meriam MFT4010-19 is a multifunction calibrator base unit with intrinsic safety and HART capabilities, plus a shoulder strap for field mobility. It is described as a tester/calibrator with intrinsic safety, designed for environments where safety ratings and connectivity (such as HART) matter. Best for: professionals needing intrinsic safety and HART functionality in a compact form. Limitation: the data set does not specify exact ranges or sensor counts, so verify compatibility with your test signals before purchasing.
Fluke 750PA4EX Intrinsically Safe Absolute Pressure Module
The 750PA4EX module provides an intrinsically safe absolute pressure range from 0 to 15 psia (0 to 1 bar) with a stated accuracy of 0.045% (0-50C) and enhanced connect-ability via finger-tight adapters. This is best for: applications requiring absolute pressure checks in hazardous zones and tight connector spaces. Caution: confirm compatibility with your existing Fluke 750 series modules and ensure installed safety approvals match your site requirements.
Buying Guide: Key Considerations For Intrinsically Safe Calibrators
What is intrinsic safety and do I need it? Intrinsic safety limits energy in circuits to prevent ignition in hazardous environments. If you work in combustible or explosive zones, an intrinsically safe calibrator reduces risk during calibration and testing.
What range and sensor configuration fit my needs? Consider whether you need only gauge pressure, absolute pressure, or dual-sensor measurements. For multi-signal tests, a calibrator with simultaneous readings helps speed workflows.
How portable should the device be? Field technicians benefit from compact, handheld units with straightforward interfaces and durable construction for rough conditions.
Which connectivity options are essential? If you operate with HART or rely on 4–20 mA signaling, choose a model with built-in signal processing or clear display of multiple inputs.
What safety and compatibility concerns exist? Verify intrinsic safety approvals for your work site and ensure compatibility with the media used in pressure generation (air, oil, water, etc.).
FAQ
- What makes a calibrator intrinsically safe? It is designed to limit electrical energy and prevent ignition in hazardous environments.
- Which calibrator is best for 4–20 mA testing? Models like the Fluke FLK-721EX-3650 support 4–20 mA signals with dual sensors and a large display.
- Can I use these calibrators with absolute pressure tests? Yes, modules like the Fluke 750PA4EX provide absolute pressure measurements.
- Are these calibrators suitable for field use? Several options are handheld, with ergonomic designs and robust construction for field calibration.
- Do these devices support HART signals? Some models, such as the Meriam MFT4010-19, include HART functionality.
- What should I confirm before purchasing? Confirm pressure range, safety approvals, signal compatibility, and connector types used in your system.
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