Posted in | Fuel Level Sensors

Model 590 Detachable Level Transmitter

The Viatran model 590 is a detachable level transmitter which has the advantage of enabling the sensors to be swapped out fast without the need to take out the cable which has already been installed. Other than the standard polyurethane cable, FEP and PVC cable options are available. These transmitters have a capability of 0-40” through 835’ W.C. with a stainless steel construction for the sensor, and polyurethane housing.

Both the 590 and 591 models are rated to the deepest level of 835 feet. The sensor head and cable may be ordered together or separately, along with any of a wide array of compatible accessories for level sensing, many of them being already in stock.

Features of Model 590

The model 590 transmitter has the following features which make it suited for use in a number of level sensing applications.

  • It is detachable
  • It has a completely stainless steel body
  • It is IP-68 compliant
  • It conforms to RoHS standards
  • It is ideal for measuring level at low pressures

The major benefit of the detachable 590 is the speed with which the sensor can be changed out, since the cable is left in situ and therefore requires no tools other than those which are used to retrieve the sensor and untwist the sensor coupling sleeve to disengage it, finally separating the two parts.

The model 590 has an all-stainless steel housing as well as sensor body, with cables made of polyurethane as standard, but with other materials being used for the cables and O-rings as available options.


The Viatran model 590 is well suited to measure fluid levels and liquid depths, for various applications including waste water systems, lift stations, holding ponds, reservoirs, rivers and dams, tanks (above-ground or in-ground), as well as tank gauging for inventory purposes.

It has the capacity to measure pressures from 0-40" W.C. through 15' W.C. with an accuracy of +/- 0.50% FSO, while for ranges over 15 feet W.C. the combined accuracy is +/- 0.35% FSO.

Viatran level transmitters also come with a wide range of optional fittings to suit all types of applications, including surge protectors, meters and cable hangers, junction boxes and cable weights. Both a replacement sensor head and the cables are available for separate purchase.

Relevant Parameters

Performance-wise, the model 590 detachable transmitter is summarized as seen below:

. .
Pressure Ranges 0 - 40" W.C. up to 0 - 835 Ft W.C. (Or equivalent in Meters or PSI)
Accuracy [Combined Non-Linearity (BFSL), Hysteresis & Repeatability] For ranges ≥ 15 Ft. W.C. ≤ +/-0.35% FSO
For ranges < 15 Ft. W.C. ≤ +/- 0.50% FSO
Compensated Temperature Range 32° to 158 °F (0 to 70 °C)
Operating Temperature Range -4° to 158 °F (-20 to 70 °C) Note: Medium must not freeze near sensor
Storage Temperature Range -13° to 158 °F (-25 to 70 °C)
Long Term Stability (%FSO) ≤ +/- 0.1% FSO / year At reference conditions)
Thermal Effect on Zero ≤ +/- 0.8% FSO per 100 °F
Thermal Effect on Span ≤ +/- 0.8% FSO per 100 °F


Electrical parameters are summed up in the following table:

. .
Output Signal 4-20 mA
Supply Voltage 8 -32 Vdc
Power Supply Regulation < +/- 0.005% FSO per volt
Circuit Protection Reverse polarity protected, CE marked
RFI / EMI CE EMC compliant as per IEC EN 61326
Voltage Spike Protection Withstand 1000 volt spike per EN 61000
Response Time <10 mSec


Mechanical properties are given in the table below:

. .
Pressure Connection Protective POM cap
Ingress Protection IP 68
Overpressure Limit 4x Minimum (>525 Ft. range = 3.2x)
Burst Pressure 5x Minimum (> 525 Ft. range = 4.8x)
Weight 0.9 lbs. (without cable)


Construction materials used in model 590 are as follows:

. .
Housing 316L stainless steel
Sensor Diaphragm 316L stainless steel
O-ring Seals FKM (Standard) or EPDM (Optional)
Protective Cap POM (Polyoxymethylene)


Other available options include:

. .
EA Special Calibration Run
PW Calibrate Transmitter with Meter / Display
ZB 1/2" NPT Conduit Adapter

Other Equipment by this Supplier

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