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Readable at the machine
A red four-digit LED presents the live temperature locally, with °C/°F selection and a display head that rotates up to 330 degrees for installation visibility.
FGP301 / Smart digital temperature switch
See the temperature. Switch the machine.
A compact Pt100 temperature switch combining local indication, programmable control outputs, and optional analog transmission for industrial equipment and fluid systems.
- Temperature range
- −50 to +300 °C
- Accuracy
- ±0.25 or ±0.5 °C
- Switch outputs
- PNP / NPN, 1 or 2
- Protection
- IP67
Local display and machine control
One device to measure, display, and switch.
The FGP301 puts a Pt100 sensing element, configurable switch logic, and a readable local display at the temperature point, with optional 4–20 mA feedback for the control system.
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Programmable switching
Set switching temperature and hysteresis from the three front-panel keys without a separate programming device.
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Flexible control outputs
Configure one or two PNP or NPN switching points, with an optional 4–20 mA temperature signal for PLC, DCS, or recording systems.
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Compact stainless construction
A stainless housing, common process threads, customizable probe insertion, and IP67 protection support demanding equipment and fluid-system installations.
Technical specification
Select the right configuration.
Published values represent the available FGP301 platform. Final probe length, process connection, switch logic, wiring, analog output, and media compatibility should be confirmed for the selected configuration.
- Sensing element
- Pt100 platinum resistance element
- Measuring range
- −50 °C to +300 °C; custom calibration by review
- Accuracy options
- ±0.5 °C or ±0.25 °C
- Local display
- Red four-digit LED; °C/°F selectable
- Display orientation
- Rotatable head, adjustable through approximately 330°
- Switch outputs
- One or two programmable setpoints; PNP or NPN logic
- Analog output
- Optional 4–20 mA temperature signal
- Power supply
- 12–24 VDC
- Process connections
- G1/4, G1/2, 1/4 NPT, or 1/2 NPT
- Probe insertion
- Custom lengths from 20 to 200 mm
- Housing material
- 304 stainless steel
- Ingress protection
- IP67
Configuration paths
Built around the machine, not a shelf number.
Switch strategy
Define one or two trip points, switching direction, hysteresis, and the fail-safe behavior the machine requires.
Output architecture
Match PNP or NPN logic to the controller and add 4–20 mA feedback when continuous temperature trending is needed.
Probe geometry
Choose insertion length around the pipe, vessel, manifold, or equipment housing and the desired response time.
Process connection
Select the G or NPT thread that fits the installation, then confirm pressure and material compatibility with the medium.
Application fit
Temperature switching where equipment needs protection.
Use the FGP301 for local indication, alarms, permissives, interlocks, and continuous temperature feedback on machinery and industrial fluid systems.
01Hydraulic and lubrication systems
02Gearbox temperature monitoring
03Chillers and cooling-water circuits
04Extrusion and injection machinery
05Compressor and pump protection
06Energy, chemical, and water-treatment systems
Start with the operating conditions
Define the trip condition and the control response.
Share the normal temperature, alarm or shutdown point, hysteresis, medium, process connection, probe insertion, PNP or NPN logic, analog-output requirement, and installation environment. Firelands will help define the right FGP301 configuration.