Description
Kobold DRH Rotating Vane Flow Meter are used for measuring and monitoring low viscous liquids. Series DRH flow meters are working according the well-known rotating vane principle. A magnet fitted in the vane and hermetically sealed from the medium transfers non-contacting the rotary motion to a Hall-effect sensor mounted in the housing.
The sensor converts the rotary motion which is proportional to the flow to a frequency signal. A series-connected electronics unit converts the signal to an analogue output, limit contacts or display. These devices can be adapted to prevailing plant conditions with the 360° rotatable screw connections.
Kobold DRH Fields of Application
- Cooling water monitoring
- Agricultural machinery
- PCB board
Kobold DRH Specification
- Measuring range: 0.2 – 8 … 2.5 – 50 l/min water
- Connection: G ⅜, G 1, ⅜” NPT, 1″ NPT
- Material: brass, stainless steel, POM, PVDF
- pmax: 100 bar
- tmax: 80 °C
- Accuracy: ±2.5 % of full scale
- Pulse output, analogue output, contacts, digital / pointer indicator
Measuring range: 0.2 – 8 … 2.5 – 50 l/min water
Connection: G ⅜, G 1, ⅜” NPT, 1″ NPT
Material: brass, stainless steel, POM, PVDF
pmax: 100 bar
tmax: 80°C
Accuracy: ±2.5 % of full scale
Analogue output, digital indicator
Measuring range: 0.2 – 8 … 2.5 – 50 l/min water
Connection: G ⅜, G 1, ⅜” NPT, 1″ NPT
Material: brass, stainless steel, POM, PVDF
pmax: 100 bar
tmax: 80°C
Accuracy: ±2.5 % of full scale
Pulse output, analogue output
Measuring range: 0.2 – 8 … 2.5 – 50 l/min water
Connection: G ⅜, G 1, ⅜” NPT, 1″ NPT
Material: brass, stainless steel, POM, PVDF
pmax: 100 bar
tmax: 80°C
Accuracy: ±2.5 % of full scale
Analogue output, contacts NPN / PNP, digital indicator
Measuring range: 0.2 – 8 … 2.5 – 50 l/min water
Connection: G ⅜, G 1, ⅜” NPT, 1″ NPT
Material: brass, stainless steel, POM, PVDF
pmax: 100 bar
tmax: 80°C
Accuracy: ±2.5 % of full scale
Analogue output, totalizer, contacts, digital indicator
DRH-…E14R, DRH-…G14 cable connection
| Wire number | DRH-…E14R Counter electronics | DRH-…G14R Dosing electronics |
| 1 | +24 VDC | +24 VDC |
| 2 | GND | GND |
| 3 | 4-20 mA | 4-20 mA |
| 4 | GND | GND |
| 5 | do not connect | Control 1* |
| 6 | Reset part quantity | Control 2* |
| 7 | Relay S1 | Relay S1 |
| 8 | Relay S1 | Relay S1 |
| 9 | Relay S2 | Relay S2 |
| 10 | Relay S2 | Relay S2 |
Control 1 <-> GND: Start-Dosing
Control 2 <-> GND: Stop-Dosing
Control 1 <-> Control 2: Reset-Dosing
Technical Details
- Material combinations: see order details
- Max. operating pressure: see order details
- Max. temperature: see order details
- Measuring accuracy:
±2.5% of full scale
±5% of full scale (DRH-…F300) - Electrical connection: plug connector DIN 43 650, plug connector M12x1, cable
- Pressure loss: max. 1 bar at max. range
- Protection: IP 65
Electronics
1. Frequency output (…F300)
- Power supply: 12-28 VDC
- Power consumption: 10 mA
- Pulse output: PNP, open collector max. 25 mA
- Electrical connection: plug connector M12x1
2. Frequency output with frequency divider
- Power supply: 24 VDC ±20%
- Power consumption: 15 mA
- Pulse output: PNP, open collector, max. 25 mA
- Electrical connection: plug connector M12x1
- Division ratio: 1… 1/128, factory set
3. Analogue output (Option plug-on display
- Power supply: 24 VDC ±20%
- Output: 0-20 mA or 4-20 mA,
- 2-wire or 3-wire
- Max. load: 500 Ω
- Electrical connection: plug connector M12x1 or DIN 43650
- Option: plug-on display (with plug connector DIN 43650 and output 4-20 mA only), 2-wire
4. Compact electronics
- Display: 3-segment LED
- Analogue output: (0)4…20 mA adjustable, max. 500 W
- Switching outputs: 1 (2) semiconductor PNP or NPN factory set
- Contact operation: N/C / N/O contact frequency programmable
- Setting: with 2 buttons
- Power supply: 24 VDC ±20%, 3-wire technology approx. 100 mA
- Electrical connection: plug connector M12x1
DRH-…Exxx (Counter electronics)
- Display: LCD, 2 x 8 digit, illuminated total, part and flow quantities, units selectable
- Quantity meter: 8-digit
- Analogue output: (0)4…20 mA adjustable
- Load: max. 500 Ω
- Switching output: 2 relays, max. 30 VAC/DC /2A/60 VA
- Settings: via 4 buttons
- Functions: reset, MIN/MAX memory, flow monitor, monitoring for part and total quantity, language
- Power supply: 24 VDC ±20%, 3-wire
- Power consumption: approx. 150 mA
- Electrical connections: cable connection or M 12 plug
More technical details see data sheet ZED
DRH-…Gxxx (Dosing electronics)
- Display: LCD, 2 x 8 digit, illuminated dosing-, total-, and flow quantity, units selectable
- Quantity meter: 8-digit
- Dosage: 5-digit
- Analogue output: (0)4…20 mA adjustable
- Load: max. 500 Ω
- Switching output: 2 relays, max. 30 VAC/DC /2A/60 VA
- Settings: via 4 buttons
- Functions: dosing (relay S2), start, stop, reset, fine dosing, correction amount, flow switch, total quantity, language
- Power supply: 24 VDC ±20%, 3-wire
- Power consumption: approx. 150 mA
- Electrical connection: cable connection or M12 plug
More technical details see data sheet ZED
Download Datasheet: Kobold DRH Rotating Vane Flowmeters
Reference : kobold.com
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