Home > Temperature > Deep Well Level Probe
The KOBOLD NTB is designed for hydrostatic level measuring in wells, reservoirs, clarification plants, and other tanks. Compact and easy to install, the NTB is well suited for protecting submersible pumps in deep wells.
The probe assembly consists of a measuring cell, a two- wire transmitter, and cable with a capillary vent tube. The housing is made of stainless steel with a pressure-sensitive diaphragm protected by a stainless steel nose cone.
The level is measured by the pressure difference between the amount of water column over the probe and atmospheric pressure, which is transferred to the probe through the capillary tube.
The differential pressure is then converted to a 4-20 mA analog signal by the piezoresistive cell and integral electronics.
Order Details (Example: NTB-1305 10)
| Range | Model | Cable Length |
| 1 meter (3.28 feet) W.C. | NTB-1301.. | ..01 = 1 meter (3.28 feet) ..10 = 10 meter (32.8 feet) ..3H = 300 meter (984.2 feet) ..YY = Custom Cable Length |
| 2 meter (6.56 feet) W.C. | NTB-1302.. | |
| 5 meter (16.4 feet) W.C. | NTB-1305.. | |
| 10 meter (32.8 feet) W.C. | NTB-1310.. | |
| 20 meter (65.6 feet) W.C. | NTB-1320.. | |
| 50 meter (164.0 feet) W.C. | NTB-1350.. | |
| 100 meter (328.1 feet) W.C. | NTB-131H.. | |
| 200 meter (656.2 feet) W.C. | NTB-132H.. | |
| Custom Span | NTB-13YY.. |
| Accessories | |
| NTB-OVP12 | Overvoltage Protection, Field Mounting |
| NTB-OVP32 | Overvoltage Protection, Rail Mounting |
| NTB-NAA209 | Cable Mounting Wedge Clamp |
| HARTCOMM | HART® Modem |
Please note that YY optioned items must have the requested values specified as notes on your order.
NTB in Systems with PC Using a PC and HART® modem (e.g. model
HARTCOMM), it is possible to create your own multi- drop HART® network, where the PC displays all NTB measurement data and also allows reprogramming
of the units as necessary. In this way, the outputs derived from the displayed data can be programmed via the PC, which acts as the master. A maximum of 15 transmitters can be connected to one HART® modem and KOBOLD’s NUS-NTB-NRM-SW software can be used for configuration.
Order Code HART® Modem: HARTCOMM
| Measuring Range: | 0…200 m (656 ft) Water Column |
| Wetted Materials: | |
| Sensing Cell: | 316L Stainless Steel |
| Probe Body | 316L Stainless Steel |
| Cable | Polyurethane |
| Seal | FKM |
| Cap | 316L Stainless Steel |
| Overload Capacity | 3 x Measuring Range |
| Output Signal | 4-20 mA, HART®, 2-wire |
| Linearity | ±0.25% |
| Effects of Ambient Temp | ±0.1% / 10 K |
| Input Voltage Range | 12-30 VDC |
| Maximum Loop Load | R Ω = Ut – 12 V , Ut = Supply Voltage 0.02 A |
| Protection | IP68 |
| Operating Temperature | 14…140 °F |
| Cable Length | Up to 300 m (985 ft) |
| Cable Diameter | Ø 7mm |
| Overvoltage Protection | |
| NTB-OVP12 | Field Mounting |
| NTB-OVP32 | DIN 46277-3 Rail |
| Max. Voltage (Peak Value) | |
| Slow: | 90 V pp |
| Fast: | 30 V pp |
| Series Resistor: | 13 Ω ±10% |
| Pulse Power | 600 W / 1 ms |
| Protection | |
| NTB-OVP12: | IP54 |
| NTB-OVP32: | IP20 |
The KOBOLD NTB is designed for hydrostatic level measuring in wells, reservoirs, clarification plants, and other tanks. Compact and easy to install, the NTB is well suited for protecting submersible pumps in deep wells.
The probe assembly consists of a measuring cell, a two- wire transmitter, and cable with a capillary vent tube. The housing is made of stainless steel with a pressure-sensitive diaphragm protected by a stainless steel nose cone.
The level is measured by the pressure difference between the amount of water column over the probe and atmospheric pressure, which is transferred to the probe through the capillary tube.
The differential pressure is then converted to a 4-20 mA analog signal by the piezoresistive cell and integral electronics.
Order Details (Example: NTB-1305 10)
| Range | Model | Cable Length |
| 1 meter (3.28 feet) W.C. | NTB-1301.. | ..01 = 1 meter (3.28 feet) ..10 = 10 meter (32.8 feet) ..3H = 300 meter (984.2 feet) ..YY = Custom Cable Length |
| 2 meter (6.56 feet) W.C. | NTB-1302.. | |
| 5 meter (16.4 feet) W.C. | NTB-1305.. | |
| 10 meter (32.8 feet) W.C. | NTB-1310.. | |
| 20 meter (65.6 feet) W.C. | NTB-1320.. | |
| 50 meter (164.0 feet) W.C. | NTB-1350.. | |
| 100 meter (328.1 feet) W.C. | NTB-131H.. | |
| 200 meter (656.2 feet) W.C. | NTB-132H.. | |
| Custom Span | NTB-13YY.. |
| Accessories | |
| NTB-OVP12 | Overvoltage Protection, Field Mounting |
| NTB-OVP32 | Overvoltage Protection, Rail Mounting |
| NTB-NAA209 | Cable Mounting Wedge Clamp |
| HARTCOMM | HART® Modem |
Please note that YY optioned items must have the requested values specified as notes on your order.
NTB in Systems with PC Using a PC and HART® modem (e.g. model
HARTCOMM), it is possible to create your own multi- drop HART® network, where the PC displays all NTB measurement data and also allows reprogramming
of the units as necessary. In this way, the outputs derived from the displayed data can be programmed via the PC, which acts as the master. A maximum of 15 transmitters can be connected to one HART® modem and KOBOLD’s NUS-NTB-NRM-SW software can be used for configuration.
Order Code HART® Modem: HARTCOMM
| Measuring Range: | 0…200 m (656 ft) Water Column |
| Wetted Materials: | |
| Sensing Cell: | 316L Stainless Steel |
| Probe Body | 316L Stainless Steel |
| Cable | Polyurethane |
| Seal | FKM |
| Cap | 316L Stainless Steel |
| Overload Capacity | 3 x Measuring Range |
| Output Signal | 4-20 mA, HART®, 2-wire |
| Linearity | ±0.25% |
| Effects of Ambient Temp | ±0.1% / 10 K |
| Input Voltage Range | 12-30 VDC |
| Maximum Loop Load | R Ω = Ut – 12 V , Ut = Supply Voltage 0.02 A |
| Protection | IP68 |
| Operating Temperature | 14…140 °F |
| Cable Length | Up to 300 m (985 ft) |
| Cable Diameter | Ø 7mm |
| Overvoltage Protection | |
| NTB-OVP12 | Field Mounting |
| NTB-OVP32 | DIN 46277-3 Rail |
| Max. Voltage (Peak Value) | |
| Slow: | 90 V pp |
| Fast: | 30 V pp |
| Series Resistor: | 13 Ω ±10% |
| Pulse Power | 600 W / 1 ms |
| Protection | |
| NTB-OVP12: | IP54 |
| NTB-OVP32: | IP20 |
WJF Instrumentation Ltd.
#5 3610 – 29th Street N.E.
Calgary, Alberta
Canada
T1Y 5Z7
Calgary Head Office
Toll-Free: (877)291-5572
Standard: (403)291-5570
Ontario & Maritimes Sales:
(905)809-6918
