Normally Open (NO) refers to the state of an electrical switch contact which stays open until a preset threshold has been met and the switch closes, e.g. a NO pressure switch set at 10 bar will close once the pressure exceeds 10 bar.
Featured alarm relay settable measurement products
Harbour seawater level sensor with digital display & relay outputs for tidal applications - Seawater compatible marine bronze level sensor with digital display and relay outputs for for tidal monitoring and controlling pumps and valves in harbour environments.
Clean Room Monitor for Air Differential Pressure, Temperature and Humidity – PMDS4 - The PMDS4 clean room monitor is designed for positive and negative monitoring of differential air pressure between the inside and outside of a clean room.
Glossary of Measurement Signal technical terms
- 2 Wire
- 3 Wire
- 4 to 20 mA Current Loop Output Signal
- 4 Wire
- Amplified Voltage Output
- BFSG – Bonded Foil Strain Gauge
- Deadband
- FSO – Full Scale Output
- HART®
- Intrinsic Safety
- mV/V – Millivolts per Volt Output Signal
- NC – Normally Closed
- Piezoresistive Strain Gauges
- Rangeable
- Ratiometric
- Span
- Span Offset
- Span Sensitivity
- Square Root Extraction
- Threshold
- Totalizer
- Transducer
- Transmitter
- TSL – Terminal Straight Line
- TSS – Thermal Span or Sensitivity Shift
- Turndown Ratio
- USB
- Vented Cable
- Wheatstone Bridge Strain Gauge
- Zero Offset
- Zero Tare
Help from Measurement Signal resources
- Supply voltage and load resistance considerations for pressure transmitters
- What is the difference between zero offset and zero drift?
- Why use 4-20mA and 3-15 psi rather than 0-20mA & 0-15psi
