Flow Sensor : ND Series
Feature
General
ND Flowsensor is ideal for measuring variety of fluid and outputs open collector pulses with the built-in amplifier type magnetic sensor.
Enhanced basic functions, user friendliness and cost efficiency are the key points
ND series offers high accuracy measurement of not only cold and warm water but also pure water, chemical fluids, etc. It is light-weighted compact body and is compatible with various kinds of fluids with the carefully selected casing materials such as PP, ETFE, PPO, etc., and with the highly sensitive magnetic sensor of our own development. This series is therefore widely applicable for various flow measurements and its control and monitoring as well.
Feature
- Highly accurate over a wide measurement range
- Simple and durable structure
- Compact and lightweight (eg. ND10: 120g)
- Compatible with various kinds of fluids
- Free installation position (For ND and NW,except the position that
of the holding plate or the local display is faced downward.) - Excellent cost-performance
- High sensitive high-density pulse output
Flowsensor Applications
- To control of warm water temperature
- To constantly supply water and warm water
- To monitor coolant, etc.
- To proportionally inject chemical fluids
- To control pressure loss of filters
Overview
| Item | Model | ||||||
|---|---|---|---|---|---|---|---|
| ND05 - TATAAA ND05- PATAAC | ND05- NATAAC | ND10- TATAAA | ND10- PATAAA | ND10- NATAAA | ND20- PATAAA | ND20- NATAAA | |
| Flow-rate range | 0.3 - 3 L/min | 1.0 - 10L/min | 1.5 - 20L/min | 3.0 - 60L/min | |||
| Accuracy (Standard installation position) |
±2% (RS) | ||||||
| Pulse unit | 2.5mL/p | 7.69mL/p | 25mL/p | ||||
| Pressure drop | 12 kPa or less (At 3L/min) |
15 kPa or less (At 10L/min) |
20 kPa or less (At 20L/min) |
60 kPa or less (At 60L/min) |
|||
| Fluid temperature range | 0 to +60°C | 0 to +70°C | 0 to +60°C | 0 to +70°C | 0 to +60°C | 0 to +70°C | |
| Connection | R 1/2 | R 3/4 | |||||
| Weight | Approx.150g | Approx.120g |
Approx.360g |
||||
Common Specification
| Maximum working pressure | 1MPa or less with a fluid temperature of +20°C | |
|---|---|---|
| Viscosity | 0.5 to 1.5 mPa·s | |
| Output signal | Open collector pulse 4-wires, Lead-wire length approx. 600mm |
 |
| Duty ratio 3/7 < A/B < 7/3 | ||
| Impressed voltage range | 3 to 24 V DC | |
| Ambient temperature | -20° to +80° (Dew condensation must be avoided) | |
| Measurable fluids | Refer to “MEASURABLE FLUID AND PARTS MATERIALS” | |
Dimensions
| ND05 | ND10 | ND20 | |
|---|---|---|---|
| A | 80 | 80 | 110 |
| B | 47 | 47 | 68 |
| C | 37.5 | 37.5 | 50 |
| D | 49 | 49 | 65 |
| E | 47 | 47 | 68 |
| F | 12.5 | 12.5 | 18 |
| G | 16 | 16 | 23 |
Handling Instructions
Observe the following handling instructions and precautions to obtain maximum performance of the Flowsensor / Flowmeter.
CAUTIONS IN MOUNTING1. The flowing direction of the fluid, when mounting, must be matched to the arrow mark on the case that indicates the direction of flow.
2. A straight pipe with uniform inner diameter must be connected to the inlet. Accuracy is adversely affected if the pipe is bent or the inner diameter is uneven.
3. The inner diameter of the inlet pipe must be greater than the nozzle diameter of the Flowsensor / Flowmeter.
| Type | Inner D, of inlet pipe | Length of straight pipe at inlet |
|---|---|---|
| ND05,NW05 | 5.5 mm or greater | Greater than 50 mm from the end of the Flowsensor / Flowmeter |
| ND10,NW10 | 10.5 mm or greater | Greater than 100 mm from the end of the Flowsensor / Flowmeter |
| ND20,NW20 | 15.5 mm or greater |
4. If pulsation occurs in the flow of the fluid, measurement accuracy is adversely affected. When a pump is used to circulate the fluid, an accumulator must be provided to remove the pulsation.
5. Be careful not to apply excessive stress on the Flowsensor / Flowmeter during installation.
6. Make sure to provide thermal insulator at places subject to freezing in winter. When leakage occurs due to half frozen fluid, accuracy is adversely affected.
7. Do not expose/install the Flowsensor / Flowmeter under direct sunshine.
8. The measuring range, operating pressure and operating temperature are indicated on the plate on the side of the Flowsensor / Flowmeter. Observe these conditions for optimum performance of the Flowsensor / Flowmeter.
9. Avoid locating the Flowsensor / Flowmeter at places subject to excessive pressure and stress such as water hammer by operating components.
10. When air enters the Flowsensor / Flowmeter, measurement accuracy is influenced. Always operate the Flowsensor / Flowmeter chamber full of fluid. To maintain high accuracy, avoid mixture of air to the fluid.
11. Avoid placing a strong magnetic material or magnetic field near the Flowsensor / Flowmeter.
12. Installation position is flexible except those shown in figures on the upper right. However, it is recommended to install the Flowsensor / Flowmeter at the standard position whenever possible. For types ND 05-TATAAA, ND10-TATAAA, NW05-TTN, NW10-TTN, installation must be at standard positions.
Incorrect mounting position (the mark of or the indicator is placed upside down)
CONNECTION (WIRING)
Measurable fluids and parts materials
MEASURABLE FLUIDS- Fluid which done not corrode materials that contact the fluid.
- Viscosity of the fluid to be measured is between 0.5 and 1.5cp.
- No slurry is contained.
- Particles attracted by magnetic power such as iron, is contained in the fluid.
(All of the above 1-4 must be satisfied.)
The table below shows components and materials of the standard type Flowsensor / Flowmeter used in portions that come into direct contact with the fluid.
| Parts name | Model | |||||
|---|---|---|---|---|---|---|
| ND05-PATAAC NW05-PTN NW05-PTP | ND05-NATAAC NW05-NTN NW05-NTP | ND05-TATAAA NW05-TTN NW05-TTP ND10-TATAAA NW10-TTN NW10-TTP | ND10-PATAAA NW10-PTN NW10-PTP | ND20-PATAAA NW20-PTN NW20-PTP | ND10-NATAAA NW10-NTN NW10-NTP ND20-NATAAA NW20-NTN NW20-NTP | |
| Lower casing Upper casing Regulator |
PP | Denatured PPO | ETFE | PP | PP | Denatured PPO |
| Vane-wheel | POM | POM | POM | POM | POM | |
| Pivot | PA | SUS304 | PA | SUS304 | SUS304 | |
| O-ring | FKM | NBR | FKM | FKM | FKM | NBR |
| Magnet | Samarium cobalt (No contact with fluid) | Samarium cobalt (No contact with fluid) | Samarium cobalt (No contact with fluid) | Ba-Fe | Ba-Fe | Ba-Fe |
| Measurable fluid | Water, Chemical fluid (Weak corrosion resistance) |
Water, Warm Water |
Chemical fluid | Water, Chemical Fluid (Weak corrosion resistance) |
Water, Warm Water |
|
- Ba-Fe: Barium-Ferrite
- ETFE: Ethylene-tetrafluoro ethylene
- FKM: Fluoro Rubber
- NBR: Acrylonitrile-butadiene rubber
- PA: Polyamide
- POM: Polyacetal or Polyoxymethylene
- PP: Polypropylene
- PPO: Polyphenylene oxide
- SUS304: Stainless steel