General industrial

Submersible

Extreme Environment Displacement Transducer

Temposonics magnetostrictive transducers

ACW Submersible LVDT Displacement Transducer High accuracy High cycle life Stainless steel Submersible Infinite resolution Linearity (best) ?.1% F.S. Lowest range ?2.5mm Highest range ?70mm Smallest length/height 153mm Smallest width/diameter 20.6mm D5W Submersible LVDT Displacement Transducer High accuracy Miniature High cycle life Submersible Stainless steel Infinite resolution Linearity (best) ?.1% F.S. Lowest range ?mm Highest range ?2.5mm Smallest length/height 46mm Smallest width/diameter 8.0mm DCW Submersible DC to DC LVDT Displacement Transducer High accuracy High resolution Voltage / 4-20mA output High cycle life Submersible Stainless steel Linearity (best) ?.1% F.S. Lowest range ?.5mm Highest range ?70mm Smallest length/height 68mm Smallest width/diameter 20.6mm SSA Seawater Submersible LVDT Displacement Transducer High cycle life Seawater submersible Stainless steel Infinite resolution Linearity (best) 0.5% F.S. Lowest range ?2.5mm Highest range ?00mm Smallest length/height 224mm Smallest width/diameter 38.1mm SSD Seawater Submersible LVDT Displacement Transducer High resolution Voltage / 4-20mA output High cycle life Seawater submersible Stainless steel Linearity (best) 0.5% F.S. Lowest range ?2.5mm Highest range ?00mm Smallest length/height 224mm Smallest width/diameter 38.1mm

High accuracy High cycle life Stainless steel Submersible Infinite resolution RDP LVDT How it Works    Data sheet (292kb)

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 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. This series of displacement transducer is available as either an unguided, captive or spring return version. LVDT transducers require external signal conditioning as detailed in the 'Electronics' section of this website.

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
Shown with standard cable assembly, see below for options D1 = 20.6mm D3 = 4.75mm D4 = 5.97mm ID = 6.80mm CL1 = 62mm TF = M5x0.8, 15mm
Type	Range	Linearity error (% F.S.)	L	X	Total weight	Armature weight	Over-Travel	Sensitivity (nom)
							Inward over-travel
ACW500	?2.5mm	<?.5/?.25/?.1	153mm	38mm	200g	19g	10mm	0.7V/V
ACW1000	?5mm	<?.5/?.25/?.1	181mm	63mm	257g	26g	23mm	0.9V/V
ACW2000	?0mm	<?.5/?.25/?.1	304mm	76mm	350g	40g	10mm	1.5V/V
ACW3000	?5mm	<?.5/?.25/?.1	420mm	114mm	484g	57g	23mm	1.5V/V
ACW4000	?00mm	<?.5/?.25/?.1	453mm	127mm	598g	71g	10mm	3.2V/V
ACW6000	?50mm	<?.5/?.25	632mm	178mm	854g	104g	10mm	2.4V/V
ACW8000	?00mm	<?.5/?.25	858mm	254mm	1.2kg	142g	36mm	1.5V/V

Captive guided version..
	Our captive guided displacement transducer has bearings to guide the armature inside the measurement sensor. Captive LVDTs are for position measurement applications where guidance may be poor and end bearings may be required.
Shown with standard cable assembly, see below for options D1 = 20.6mm D3 = 4.75mm CL1 = 62mm TF = M5x0.8, 15mm
Type	Range	Linearity error (% F.S.)	L	X	Total weight	Over-Travel		Sensitivity (nom)
						Inward over-travel	Outward over-travel
ACW500B	?2.5mm	<?.5/?.25/?.1	153mm	38mm	314g	10mm	28mm	0.7V/V
ACW1000B	?5mm	<?.5/?.25/?.1	181mm	63mm	370g	17mm	25mm	0.9V/V
ACW2000B	?0mm	<?.5/?.25/?.1	304mm	76mm	541g	10mm	28mm	1.5V/V
ACW3000B	?5mm	<?.5/?.25/?.1	420mm	114mm	683g	23mm	28mm	1.5V/V
ACW4000B	?00mm	<?.5/?.25/?.1	453mm	127mm	740g	10mm	28mm	3.2V/V
ACW6000B	?50mm	<?.5/?.25	632mm	178mm	1.1kg	10mm	35mm	2.4V/V
ACW8000B	?00mm	<?.5/?.25	858mm	254mm	1.5kg	36mm	41mm	1.5V/V
ACW10000B	?50mm	<?.5/?.25	1043mm	305mm	1.6kg	36mm	47mm	2.0V/V
ACW15000B	?75mm	<?.5	1443mm	406mm	2.2kg	10mm	28mm	3.2V/V
ACW18500B	?70mm	<?.5	1716mm	508mm	2.6kg	23mm	35mm	3.6V/V

Spring return version..
	Our spring displacement transducer has bearings to guide the armature inside the measurement sensor and a spring which pushes the armature to the fully out position. Spring return LVDTs are appropriate where it is not possible to connect the transducer armature to the moving component being measured.
Shown with standard cable assembly, see below for options D1 = 20.6mm D3 = 4.75mm CL1 = 62mm
Type	Range	Linearity error (% F.S.)	L	X	Total weight	Spring force (nom)		Over-Travel		Sensitivity (nom)
						Spring force at X	Spring rate	Inward over-travel	Outward over-travel
ACW500A	?2.5mm	<?.5/?.25/?.1	153mm	38mm	214g	1.2N	0.2N/cm	6mm	28mm	0.7V/V
ACW1000A	?5mm	<?.5/?.25/?.1	181mm	63mm	257g	1.9N	0.3N/cm	4mm	25mm	0.9V/V
ACW2000A	?0mm	<?.5/?.25/?.1	304mm	76mm	428g	4.1N	0.4N/cm	6mm	28mm	1.5V/V
ACW3000A	?5mm	<?.5/?.25/?.1	420mm	114mm	513g	5.4N	0.4N/cm	15mm	28mm	1.5V/V

Electrical termination options * Transducer and cable option specifications should be compared and the worst figures used
Standard cable - End exit connector with cable fitted
		CL1 = 62mm Cable length = 5m Operating temperature range* = -25癈 to 90癈 Maximum static pressure* = 1000kPa Connection details
Option code 1 - End exit solder pins for customer to fit their own cable
		CL1 = 21mm CL2 = 6.4mm CD1 = 12.7mm Operating temperature range* = -40癈 to 125癈 Connection details
Option code 2 - End exit fully sleeved integral cable
		CL1 = 25mm CL2 = 51mm CD1 = 25mm CBD (Cable bend datum) = 184mm Cable length = 600mm to 7m Operating temperature range* = -40癈 to 100癈 Maximum static pressure* = 3MPa Connection details
Option code 3 - End exit part-sleeved integral cable
		CL1 = 25mm CL2 = 51mm CD1 = 25mm CBD (Cable bend datum) = 70mm CSL = 600mm Cable length = 1000mm to 100m Operating temperature range* = -40癈 to 90癈 Maximum static pressure* = 2MPa Connection details
Option code 5 - End exit integral MI (mineral insulated) stainless steel cable
		CL1 = 4mm CD1 = 3.0mm Cable length = 100mm to 70m Operating temperature range* = -40癈 to 200癈 Maximum static pressure* = 21MPa D5 = 11.7mm Connection details
Option code 6 - End exit connector with customer defined cable length fitted
		CL1 = 64mm Cable length = 0mm to 1000m Operating temperature range* = -25癈 to 125癈 Maximum static pressure* = 800kPa Connection details
Standard cable 7 - Side exit connector with cable fitted
		CBX = 25mm TR = M5x0.8, 11mm CL1 = 64mm Cable length = 5m Operating temperature range* = -25癈 to 90癈 Maximum static pressure* = 1000kPa Connection details
Standard cable 8 - Side exit fully sleeved integral cable~
		CBX = 25mm TR = M5x0.8, 11mm CL1 = 30mm CL2 = 55mm CD1 = 25mm CBD (Cable bend datum) = 184mm Cable length = 600mm to 7m Operating temperature range* = -40癈 to 100癈 Maximum static pressure* = 3MPa Connection details
Standard cable 9 - Side exit connector with customer defined cable length fitted
		CBX = 25mm TR = M5x0.8, 11mm CL1 = 72mm Cable length = 0mm to 1000m Operating temperature range* = -25癈 to 125癈 Maximum static pressure* = 800kPa Connection details
Standard cable 10 - Side exit part-sleeved integral cable
		CBX = 25mm TR = M5x0.8, 11mm CL1 = 30mm CL2 = 55mm CD1 = 25mm CBD (Cable bend datum) = 184mm CSL = 150mm Cable length = 600mm to 1000m Operating temperature range* = -40癈 to 90癈 Maximum static pressure* = 2MPa Connection details
Standard cable 11 - Side exit part-sleeved integral cable and conduit fitting
		CBX = 25mm TR = M5x0.8, 11mm CL1 = 25mm CL2 = 50mm TC = 1/2''-14 NPT, 20mm CBD (Cable bend datum) = 184mm CSL = 150mm Cable length = 1000mm to 1000m Operating temperature range* = -40癈 to 90癈 Maximum static pressure* = 2MPa Connection details

Options and accessories TM0315 Operating temperature range (maximum) = 200癈  ( ?00mm maximum ) Rod-end bearings for captive-guided position transducers Alternative probe tips for LVDTs Mounting block Electronics

ACW Series Submersible Transducer Cable Options

The cable options offered below are for RDP Electronics ACW transducers and are instead of the standard connector. For dimensional purposes the red line aligns the cable option with the red line on the transducer drawing. Please note that the options have a temperature and pressure specification. This should be used in conjunction with the transducer pressure and temperature specification. The worst temperature figures should be used*and the pressure figure replaces the standard figure.

	Option 1 - Pins only.
	A= 21mm, B= 6.35mm
	No cable is fitted so that the customer may mould their own cable to the rear of the transducer which may affect the figures given below
	Maximum:- Length- N/A, Pressure N/A Temp* -55°C to 125°C
	Option 2 - Integral all sleeved cable.
	A= 51mm, B= 26mm
	The cable is protected by a clamped sleeve over the entire length of the cable.
	Maximum:- Length- 7m, Pressure 35bar Temp* -55°C to 100°C
	Option 3 - Integral partially sleeved cable.
	A= 51mm, B= 26mm
	Similar to option 2 but the sleeve continues for 600mm only. It is then sealed to the inner cable.
	Maximum:- Length- 1000m, Pressure 17bar Temp* -55°C to 90°C
	Option 4 - Braided flexible Stainless Steel hose
	A = 34mm, B = 46mm, D = 9mm, H = 20.5mm across corners Min. Bend radius: - 38mm non-flexing, 76mm flexing.
	The inner cable is protected by a waterproof PTFE liner which itself is protected by a flexible 304 Stainless Steel braided hose. The pressure fitting at the cable end is a 1/4" BSP 60° swivel. It requires a BSP P 60° cone seat fixed male fitting to mate.
	Maximum:- Length- 10m, Temp* -50°C to 125°C Max pressure 206bar
	Option 4/315 - Braided flexible Stainless Steel hose with high temperature option
	A = 34mm, B = 46mm, D = 9mm, H = 20.5mm across corners Min. Bend radius: - 38mm non-flexing, 76mm flexing.
	As option 4 except including a transducer modification to enable operation at 200°C max. APPLICABLE TO ACW TRANSDUCERS UP TO ±100mm ONLY.
	Maximum:- Length- 10m, Temp* -50°C to 200°C Max pressure 206bar at up to 144°C (degrades at 2.4bar/°C above 144°C)
	Option 5 - Integral MI cable.
	A= 4mm, B= 11.7mm
	MI cable is a stainless steel sheathed cable which contains desiccated insulating powder. The cable seal is required to prevent moisture being drawn in by the insulator. The MI cable is electron beam welded into the rear of the transducer providing a very high integrity seal. Please note that although MI cable is flexible to a degree, it should be bent once only and not to a radius smaller than 12mm using the correct bending mandrill.
	Maximum:- Length- 10m, Pressure 206bar Temp* -55°C to 200°C (100°C max at cable seal)
	Option 5/315 - Integral MI cable with high temperature option
	A= 4mm, B= 11.7mm
	As item 5 except including a transducer modification to enable operation at 200°C max. APPLICABLE TO ACW TRANSDUCERS UP TO ±100mm ONLY.
	Maximum:- Length- 10m, Pressure 206bar Temp* -55°C to 200°C (100°C max at cable seal)
	Option 6 - Fischer Connector.
	A= 4mm, B= 59mm
	The Fischer connector is not moulded and can be fitted with a suitable type of cable by RDP or by the customer. Although at 8 bars it has a lower pressure rating than the standard moulded connector, it is appropriate where cable longer than the standard cable length of 5m are required.
	Maximum:- Length- 1000m, Pressure 8bar Temp* -25°C to 125°C
	Max/min cable diameter acceptable:- 2.9mm to 8.7mm. If fitting your own cable, please advise diameter.
	Option 7 - Radial Lumberg Connector.
	A= 25mm, B= 86mm, mounting thread = M5 x 0.8 female, 11mm deep
	This is simply a radial (side) outlet version of the standard cable assembly. The advantages are firstly that it reduces the overall length of the transducer and secondly it allows a rear end female thread to be fitted to the transducer.
	Maximum:- Length- 5m, Pressure 10bar Temp* -40°C to 90°C
	Option 8 - Radial Integral Sleeved Cable.
	A= 25mm, B= 51mm, C= 26mm, Bend datum= 184mm, mounting thread = M5 x 0.8 female, 11mm deep
	This is a side outlet version of option 2. Again it provides a shorter transducer and a rear end female thread for mounting. The cable should not be bent within the dimensions of the bend datum.
	Maximum:- Length- 7m, Pressure 35bar Temp* -55°C to 100°C
	Option 9 - Radial Fischer Connector.
	A= 25mm, B= 72mm, mounting thread = M5 x 0.8 female, 11mm deep
	(Radial version of option 6). A shorter overall length and rear end female threads are provided by this option.
	Maximum:- Length- 1000m, Pressure 8bar Temp* -25°C to 125°C
	Max/min cable diameter acceptable:- 2.9mm to 8.7mm. If fitting your own cable, please advise diameter.
	Option 10 - Radial Integral partially sleeved cable.
	A= 25mm, B= 51mm, C= 26mm, Bend datum = 184mm, mounting thread = M5 x 0.8 female, 11mm deep
	Similar to option 8 but the sleeve continues for 600mm only. It is then sealed to the inner cable. The cable should not be bent within the dimensions of the bend datum.
	Maximum:- Length- 1000m, Pressure 17bar Temp* -55°C to 90°C
	Option 11 - Radial Integral partially sleeved cable with 1/2"-14 NPT conduit fitting.
	A=22.5mm, B=50mm, C= 19.8mm, Bend datum = 184mm, mounting thread = M5 x 0.8 female, 11mm deep
	This transducer option allows the possibility of a double seal; the inner cable as shown is sealed into the transducer with an outer sleeve that is then bonded to the inner cable. In addition, a customer supplied 1/2"-14 NPT conduit fitting may be applied to the overall assembly adding even greater pressure and mechanical protection. The cable should not be bent within the dimensions of the bend datum.
	Maximum:- Length- 1000m, Pressure 17bar (without conduit), 200bar with correctly fitted conduit Temp* -55 to 90°C
* Where the application temperature approaches the extremes of the specification, please contact RDP Electronics or your distributor in order that we may fully assess the suitability of the cable option selected.

Due to the RDP Electronics policy of on-going development, specifications may change without notice.
Any modification may affect the specification of our equipment.