Weber Sensors 4120.81M S140 NPT Flow-Captor Flow Monitor 1/2" NPT / 115 VAC, Normally Open, Relay Circuit with BH5 Connector with Thread Reduction
- Part #:4120.81M S140 NPT
- Model #:Flow-Captor
- Condition:Brand New

The flow-captor type is used in automation processes and other industrial applications where liquid media must be monitored. The sensor works according to the calorimetric measuring principle and without mechanically moved parts. The flow-captor detects the flow velocity of the medium and converts it into an electrical signal.
Features:
- robust metal construction (M)
- plug design for Brad-Harrison coupling (S140)
- separate setting of "Range" and "Set-point"
- pressure resistant up to max. 100 bar
- analogue display of flow condition and switching point via LED chain
- ISO 9001:2015
- Specification Sheet
- Manuals/Tutorials
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| Medium | water-based |
| Sensor Data | |
| Measuring range | 0 - 20 cm/s to 0 - 300 cm/s, cont. adjust |
| Set-point range | approx. 15 % - 90 % of measuring range setting |
| Medium temperature | -20 °C to +80 °C |
| Ambient temperature | -20 °C to +70 °C |
| Pressure | max. 100 bar (1000 Kpa) |
| Response time | 2 sec. - 15 sec., according to range setting |
| Linearity deviation | < 5 % |
| Repeatability | < 2 % |
| Hysteresis | approx. 10 % |
| Mechanical Data | |
| Protection class | IP67 |
| Material: Housing | stainless steel AISI 303 |
| Material sensor head | stainless steel AISI 303 |
| Thread | 1/2" - 14 NPT |
| Electrical connection | Brad-Harrison male socket, 5-pin (order cable type 4930E separately) |
| Electrical Data | |
| Operating voltage | 90 - 250 VAC/DC |
| Switching current | ≤ 5 A (120 VAC), ≤ 3 A (250 VAC), max. 5 A 150 W at VDC |
| Initial operation | approx. 10 sec. after connection of power |
| Electrical output | relay with potential contact |
| Flow < set-point | |
| LED, green | off |
| Output relay | not activated |
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