Submersible Level Transmitters
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Submersible Level Transmitters
- 1. Submersible Level Transmitters T h e m a t e r i a l s i n c l u d e d i n t h i s c o m p i l a t i o n a r e f o r t h e u s e o f D w y e r I n s t r u m e n t s , I n c . p o t e n t i a l c u s t o m e r s a n d c u r r e n t e m p l o y e e s a s a r e s o u r c e o n l y . T h e y m a y n o t b e r e p r o d u c e d , p u b l i s h e d , o r t r a n s m i t t e d e l e c t r o n i c a l l y f o r c o m m e r c i a l p u r p o s e s . F u r t h e r m o r e , t h e C o m p a n y ’ s n a m e , l i k e n e s s , p r o d u c t n a m e s , a n d l o g o s , i n c l u d e d w i t h i n t h e s e c o m p i l a t i o n s m a y n o t b e u s e d w i t h o u t s p e c i f i c , w r i t t e n p r i o r p e r m i s s i o n f r o m D w y e r I n s t r u m e n t s , I n c . © C o p y r i g h t 2 0 1 5 D w y e r I n s t r u m e n t s , I n c .
- 2. Submersible Level Transmitters O v e r v i e w T h e M e r c o i d ® D i v i s i o n o f D w y e r I n s t r u m e n t s o f f e r s f o u r s e r i e s o f s u b m e r s i b l e l e v e l t r a n s m i t t e r s w i t h d i f f e r e n t f e a t u r e s s u i t a b l e f o r d i f f e r e n t a p p l i c a t i o n s T h e s e a r e t h e : F B LT, P B LT, M B LT, & S B LT
- 3. Submersible Level Transmitters O v e r v i e w S u b m e r s i b l e l e v e l t r a n s m i t t e r s a r e p r e s s u r e t r a n s m i t t e r s m a n u f a c t u r e d t o r e a d h y d r o - s t a t i c p r e s s u r e f r o m i n s i d e t h e f l u i d T h e s e t r a n s m i t t e r s a r e s u b m e r s e d i n t o t h e f l u i d t h a t t h e y a r e m e a s u r i n g a n d w i l l g i v e a n o u t p u t p r o p o r t i o n a l o f t h e f l u i d l e v e l a b o v e t h e s e n s o r l o c a t i o n
- 4. Submersible Level Transmitters O v e r v i e w H y d r o s t a t i c p r e s s u r e i s t h e p r e s s u r e c r e a t e d b y t h e h y d r o s t a t i c f o r c e p e r u n i t a r e a a t t h e b a s e o f a c o l u m n o f l i q u i d T h i s c a n a l s o b e c a l l e d t h e p r e s s u r e h e a d o r h e a d p r e s s u r e a n d i s o f t e n r e f e r r e d t o a s t h e h e i g h t o f t h e f l u i d , s u c h a s i n c h e s o f w a t e r c o l u m n , i n c h e s o f m e r c u r y, o r f e e t o f w a t e r T h e m e a s u r e m e n t i s d e p e n d e n t o n t h e l i q u i d d e n s i t y a n d i n d e p e n d e n t o f t h e s h a p e o f t h e c o n t a i n e r T h i s i s b a s e d o n t h e p r o p e r t y t h a t p r e s s u r e i s e q u a l t o d e n s i t y t i m e s t h e h e i g h t o f t h e l i q u i d
- 5. Submersible Level Transmitters O v e r v i e w S i n c e t h e s e i n s t r u m e n t s a r e m e a s u r i n g t h e h y d r o - s t a t i c p r e s s u r e t h e y m u s t c o m p e n s a t e f o r t h e a t m o s p h e r i c p r e s s u r e t h a t a c t s o n t h e f l u i d s u r f a c e Va r i a t i o n s o f b a r o m e t r i c p r e s s u r e w i t h w e a t h e r c h a n g e s w i l l a f f e c t t h e a c c u r a c y o f r e a d i n g s
- 6. Submersible Level Transmitters O v e r v i e w A t m o s p h e r i c p r e s s u r e i s t h e p r e s s u r e d u e t o t h e f o r c e p e r u n i t a r e a c r e a t e d b y w e i g h t o f t h e g a s e s i n t h e a t m o s p h e r e a b o v e t h a t s u r f a c e w h e r e i t i s b e i n g m e a s u r e d A t m o s p h e r i c p r e s s u r e d e c r e a s e s a s e l e v a t i o n i n c r e a s e s a s t h e r e i s l e s s m a s s o f g a s e s a b o v e t h e p o i n t b e i n g m e a s u r e d
- 7. Submersible Level Transmitters O v e r v i e w F o r t h i s r e a s o n , a l l M e r c o i d ® s u b m e r s i b l e l e v e l t r a n s m i t t e r s i n c l u d e a v e n t t u b e t h a t a l l o w s f o r a t m o s p h e r i c p r e s s u r e c o m p e n s a t i o n S t a n d a r d M e r c o i d ® i n s t a l l s a m a i n t e n a n c e v e n t f i l t e r t o p r o t e c t t h e s e n s o r f r o m w a t e r a n d d e b r i s
- 8. Submersible Level Transmitters O v e r v i e w W h e n p u r c h a s i n g a s u b m e r s i b l e l e v e l t r a n s m i t t e r, t h e r a n g e m u s t b e s p e c i f i e d a t t h e t i m e o f o r d e r i n g T h e r a n g e c a n b e o r d e r e d i n p s i , f e e t o f w a t e r c o l u m n , o r m e t e r s o f w a t e r c o l u m n I f t h e f l u i d b e i n g m o n i t o r e d i s n o t w a t e r - b a s e d , a s p e c i f i c g r a v i t y c o r r e c t i o n m a y b e p r o g r a m m e d i n t o t h e r e c e i v i n g o r c o n t r o l l i n g d e v i c e c o n n e c t e d t o t h e t r a n s m i t t e r