SSD Seawater Submersible LVDT Displacement Transducer |
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How it Works - Dc LVDT How it Works - 4 to 20mA LVDT  Data sheet (193kb) |  | ||||||||||
| These transducers are for displacement / position measurement. They make an accurate position measurement of the movement of the armature (the sliding part) relative to the body of the displacement transducer. This transducer uses the Linear Variable Differential Transformer (LVDT) principle which means that it is probably the most robust and reliable position sensor type available. The strength of the LVDT sensor's principle is that there is no electrical contact across the transducer position sensing element which for the user of the sensor means clean data, infinite resolution and a very long life. Our DC to DC LVDT transducer has all of the benefits of the LVDT sensor principle with the added convenience of built-in LVDT electronics enabling a dc supply and dc output. As an option we can offer a 4-20mA 2 wire connection to the transducer on some models. Our submersible displacement transducers are designed to make measurements whilst submerged in suitable liquids. Fluids which are non-magnetic can be allowed to flood the armature tube without affecting the operation of the transducer. The SS series LVDTs are specially designed for use in sea water and heavy industrial environments with some corrosive chemicals. These LVDTs are made of welded 316 stainless steel and have a through bore plus very heavy construction. Therefore, the SS series LVDTs are capable of withstanding the most arduous industrial applications as well as 10 years seawater submersion at a depth of up to 7546ft. | |||||||||||
| Unguided version. | |||||||||
 | On our unguided LVDTs the armature assembly is a separate component, to make a measurement the user must guide the armature inside the body without touching the sides. Unguided position measurement transducers are appropriate where external guidance is available and give truly non-contact operation | ||||||||
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| Side (radial) exit cable. | ||||||||||||||||||||||||||||||||
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| Type | Range | Linearity error (% F.S.) | L | X | LA | Total weight | Armature weight | |||||||||||||||||||||||||
| SSD500 | ±12.5mm (±0.5'') | <±0.5 | 8.8'' | 2.09'' | 5.7'' | 2.5lb | 3.2oz | |||||||||||||||||||||||||
| SSD1000 | ±25mm (±1'') | <±1 | 9.9'' | 2.60'' | 6.7'' | 2.9lb | 3.5oz | |||||||||||||||||||||||||
| SSD2000 | ±50mm (±2'') | <±0.5 | 13.6'' | 3.58'' | 10.4'' | 3.9lb | 5.6oz | |||||||||||||||||||||||||
| SSD3000 | ±75mm (±3'') | <±0.5 | 17.1'' | 4.61'' | 13.7'' | 4.3lb | 7.4oz | |||||||||||||||||||||||||
| SSD4000 | ±100mm (±4'') | <±0.5 | 21.1'' | 5.59'' | 17.3'' | 4.7lb | 9.2oz | |||||||||||||||||||||||||
| Output details | ||||
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| Option code | Note | - position | 0 | +position |
| Standard Connection details | -5V (+0% - 5%) | 0V | 5V (+0% - 5%) | |
| TM0627 | 5V (+0% - 5%) | 0V | -5V (+0% - 5%) | |
| TM0085A Connection details | 0V | 5V | 10V (+0% - 5%) | |
| TM0085B Connection details | 10V (+0% - 5%) | 5V | 0V | |
| TM0321A Connection details | >=±12.5mm (±0.5'') | 4mA | 12mA | 20mA |
| TM0321B Connection details | >=±12.5mm (±0.5'') | 20mA | 12mA | 4mA |
| Specification | ||
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| V output | Supply voltage (dual) | ±12V to ±20V dc, 30mA |
| Supply voltage (single, must be floating) | 24V to 40V dc, 30mA | |
| Change in output for change in supply | 5mV/V (typical) | |
| Output load | 10kOhms | |
| Output ripple | 30mV peak-to-peak (typical) | |
| Electrical output bandwidth | 200Hz | |
| Output impedance | 2 Ohms | |
| Operating temperature range | -40°F to 140°F | |
| 4-20mA output | Supply voltage | 12V to 36V dc |
| Max loop resistance | (Supply voltage-11) x 50 Ohms | |
| Output ripple | 50uA (peak-to-peak) | |
| Electrical output bandwidth | 200Hz | |
| Operating temperature range | 14°F to 140°F | |
| Both outputs | Temperature coefficient (zero) | ±0.006% F.S. /°F (typical) |
| Temperature coefficient (span) | ±0.017% F.S. /°F (typical) | |
| Electrical termination | 6.6ft (integral cable) | |
| Maximum static pressure | 3336psi | |
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| Due to our policy of on-going development, specifications may change without notice. Any modification may affect some or all of the specifications for our equipment. | ||||
| RDP Electrosense 2216 Pottstown Pike Pottstown, PA 19465 USA Tel: 610-469-0850 Tel: 800-334-5838 Fax: 610-469-0852 Email: info@rdpe.com |
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