If your car tyres are correctly inflated, you will have increased safety and more predictable handling, as well as reduced consumption and emissions. [10159] Slime Pro Tubeless Sealant - 3oz. Since maintaining your tires is so important to your safety and your car's overall performance, it's important to know what tire pressure is right for your vehicle. Found inside – Page 250... 232 Pitch - and - yaw indicator , 133 Plywood fuselage , 84 Pobjoy engine , 50 , 103 Prestone cooling , 66 Puss ... 155 Rudder control , 28 Rules of the air , 198 KINNER engine , 106 Klemm monoplane , 109 LA ANDING , 169 Langley ... i only have a pencil type gauge and an antique brass foot pump and as most garage forecourts are a no go at the moment i was wondering what others use. Price: Around £7Rating: 2.5 /5. 0000053258 00000 n 82 0 obj <> endobj 0000009040 00000 n In that time, Ring has become a market leader, winning numerous product awards across the UK and Europe: £5.35. P5 Tyre Inflator with Pressure Gauge would automatically turn off in 15 seconds without any operation to save the battery. 0000043717 00000 n £7.99. URAQT Tyre Pressure Gauge, 4 Ranges Digital Inflator Tyre with Tyre Tread Depth Gauge and 4 Pcs Valve Caps, Backlight LCD Display 150 PSI ABS Non-Slip Grip for Car, Truck, Bicycle, Motorcycles. £7. £16.99. Halfords Digital Tyre Pressure Gauge makes light work of measuring your tyre pressures with its easy to read, large display and comfy grip handle. It offers you everything that you are looking for in a tire gauge. -Always check the pressure when tyre is cold. MEASURING YOUR TYRE PRESSURE. 0000212644 00000 n Tyre Inflator: Bike Chat Forums Index-> General Bike Chat-> General Bike Chat (12) 12 product ratings - Halfords RCP-B190 12V Electric Rapid Tyre Inflator Free Fast Postage £21.99 ­Halfords Essentials Metal Barrel Foot Pump with Pressure Guage Please enable cookies in your web browser to improve your shopping experience. It's powered by two . 0000023710 00000 n Limited time deal. 0000038403 00000 n 0000050956 00000 n Add to wishlist. 0000158450 00000 n Haynes Manuals Head Gasket & Exhaust Repairs Tyre Inflators & Pressure Gauges Garage Essentials Jump Leads Battery Chargers . The best one, at £22, is the dial-type Halfords Tyre Gauge Pro 0-60 psi. Halfords Rechargeable Multi Purpose Tyre Inflator. Best budget tyre inflator: Ring RAC 635 12V Preset Digital Air Compressor. PROFESSIONAL TYRE PRESSURE GAUGE AIR MEASUREMENT PSI/BAR 8815. You can use a suitable pressure gauge to measure your tyre pressure to make sure it meets the manufacturers recommended levels. Rating. Found inside – Page 371Regu . lar Products - Ammeters ; chemical attachments ; air volume controls ; absolute pressure gauges ... for storage tank liquid levels and temperatures including manual selection type and automatic scanning type ; data recording ... 82 78 0000051047 00000 n The winner of our group test of tyre compressors is this one - the Halfords Advanced Rechargeable Multi-Purpose Tyre Inflator, priced at £54.99 at the time of our test. Auto Talk 101: How to Check Tire Pressure and Inflate Tires - as part of the expert series by GeoBeats. Spread the cost from £9.93 per month. Found inside – Page 201NotA brief official announcement of the death of Lieutenant William Halford , U. S. Navy , retired , on February 7 serves ... an improvised sextant made from the Saginaw's steam gauge together with broken bits of a stateroom mirror and ... (1) 1 product ratings - Draper Digital Air Line Tyre Pump Inflator Pressure Gauge Compressor 1/4" BSP. 0000023418 00000 n 0000005525 00000 n Chinese scholars are now making up for lost time. This assortment of essays, most by mainland Chinese academics and students, focuses upon the role of culture – very broadly defined – in Sino-American affairs. xref £199.99. To test your tyre pressure, you need an accurate pressure gauge. Please turn it on so that you experience this site's full capabilities. 0000105954 00000 n Featuring a reinforced rubber hose that can withstand even extreme bends, this tyre pressure gauge is extremely accurate, and can measure air pressure in almost any tyre imaginable, providing measurements . MEASURING YOUR TYRE PRESSURE. Free postage. The only minus point was the disappointing instructions. Be ready for any sudden punctures and keep a bottle of tyreweld in your boot at all times, the ideal accessory for getting you back on your journey in no time. Halfords Digital Tyre Pressure Gauge Portable Vehicle Air Compressors & Inflators, Halfords Digital Tyre Pressure Gauge Silver Vehicle Air Compressors & Inflators, Halfords Pressure Gauge Vehicle Air Compressors & Inflators, Foot Pump Vehicle Air Compressors & Inflators, Foot Pump Manual Vehicle Air Compressors & Inflators, 0000002502 00000 n Inside the valve stem is a metal pin - press this with a screwdriver to let air out. To test your tyre pressure, you need an accurate pressure gauge. Uniquely in this test it has an air release, so getting the right pressure is easy once you’ve inflated the tyre. Halfords LED Digital Tyre Pressure Gauge Extra Info. If your tyre needs extra air, you should inflate it using an air pump at home, or use the facilities provided in many petrol stations. Halfords tyre pressure gauges. Write down the reading for the tyre. Electronic Car Tyre Pressure Gauges For Vehicles: TireTek Flexi-Pro Car Tyre Pressure Gauge. Halfords Digital Programmable Tyre Pressure Gauge - Recommended. The Halfords Rechargeable Multi Purpose Tyre Inflator offers maximum usage for many items such as car tyres to leisure inflatables such as beach balls and dinghys. 4.700611. out of 5. 0000023872 00000 n -Read pressure from an angle vertical to dial face. Provides concise, yet authoritative descriptions of the most common techniques used to study wild carnivores and to conserve and manage their populations within increasingly human-dominated landscapes. 159 0 obj <>stream 0000004793 00000 n 0000003993 00000 n The pressure gauge can read up to 99 psi and also takes readings in bar, kpa and kg/cm^2. Automatic on/off operation for easy use. £24.99. 0000009455 00000 n UHF / CB Radios. Shop the full range below. Contact: www.halfords.com. We offer free next day delivery on all orders over £40, so you’ll be good to go straight away. Sturdy Material: P5 Tyre Pressure Gauge comes with heavy duty stainless steel construction, brass air chuck, thicken silicone protective cover and durable rubber hose, which ensures its long life span. Digital Tyre Pressure Gauge Art.no 40-8486Model 1.EM6083 Please read the entire instruction manual before use and save it for future reference. Take off the dust cap on the valve, fix on the pressure gauge and take a note of the result. Sealants. Halfords Plastic Dust Caps. For over 10 years Ring has been developing portable tyre inflators. Microbiologists; Virologists; Educators; Geographers; Biography; Australia. View details. Tire Gauge for Car and Trucks Tires by Vondior. Air pressure in tires is measured in pounds per square inch, or PSI; usually, the recommended pressure ranges between 30 and 35 PSI. Found inside – Page 689... cases of , 100 , 251 Atmospheric pressure , Dr. Sanderson's gauge for , of the cerebellum , from disease of the ear ... 82 Auriculo - ventricular valves , Dr. Halford on the 187 compression followed by ligature in , case closure of ... As you would expect for this kind of money, you get a programmable gauge with this Halfords product, but it doesn’t have a tread depth gauge. Halfords tyre pressure gauges. Found inside – Page 349348 AN OLD PUZZLE ABOUT THE STRENGTH OF BEAMS THE BIRMINGHAM COMPRESSED AIR POWER SCHEME 66 LITHANODE ... THE MARCHANT ENGINE with these instructions . leaf , without raising the latter to the perpendicular posiFOREIGN AGENTS FOR THE ... Let air out if necessary. Tyre Valves & Caps. 0000008328 00000 n Read 0 Reviews Same page link. What is the right tire pressure. Why we like it: If you are looking for a pressure gauge that is accurate but has a very low learning curve, then the Cooolbuy model is for you. 0000158411 00000 n All rights reserved.Auto Express™ is a registered trade mark. The distance the piston travels is relative to the pressure in the tire. Found inside – Page 124F : G : ( Halford A COLOURED PLATE is given with each Monthly Part of But why go abroad for the instruction when ... C. Pa Ai E. ( Carlisle : -A Palmer tyre should suit clincher rim provided factures dynamos would undertake the work and ... 0000020706 00000 n 0000038140 00000 n Copyright © Autovia Ltd 2021 (Autovia Ltd is part of Dennis Group). 0000011499 00000 n 0000014889 00000 n 0000210910 00000 n (308) 308 product ratings - Tyre Pressure Gauge 10- 50 PSI Car Bike Van Push Fit Schrader Valve. Shop the latest Halfords Mini Cleaning Kit at Halfords IE. Rating: 4.5 stars. 0000052889 00000 n A few weeks back i used the pump at my local shell garage to inflate my tyres (32psi ) the posh looking machine duly charged me a quid for the pleasure . The international financial value of Grand Prix racing has grown substantially in recent years. This book will focus upon the massive size, value, importance and impact of the industry. Best light rechargeable inflator: Halfords Rechargeable Multi-purpose Inflator. Measures in BAR, PSI and KPA. How to use a conventional tire pressure gauge. The pressurized air is pushing the piston to the right, and the spring is pushing back. 0000005638 00000 n First published in 1986, this book has become regarded as a classic and is being reissued by Haynes to meet popular demand. Guild Cordless Tyre Inflator with Accessories - 12V. The short answer is you press the head of the gauge against your tire valve and see what the reading says. [10009] 32oz Tire Sealant for All Tires. Trust in Numbers questions whether such success in the study of stars, molecules, or cells should be an attractive model for research on human societies, and examines why the natural sciences are highly quantitative in the first place. Swivel angled tyre connection and air release valve. Found inside – Page viStevenson , 33 , 159 , 282 , 38 , 511 , erratum , 680 Rapid " Manual Charging Machine , 654 Water - gas , Carburetted , s , Cutler ... 337 Gauge , Screw - cutting , 66 Gear , Yew Variable Speed , 65 Turner - Pegg Positive Corliss . This volume represents a far-reaching attempt to stimulate research and discussion in the field in preparation for the start of the DSM-V process, still several years away, and to integrate information from a wide variety of sources and ... A tire pressure gauge is a simple sensor device that gives reading on the amount of air or pressure within the tires. Tyre Repair. 0000213798 00000 n Alternatively use our tyre pressure finder. View on Amazon. Halfords RCP-B190 12V Electric Rapid Tyre Inflator Free Fast Postage. If you should have any questions concerning Range: 5 - 99 psi, 0.4 - 6.8 bar, 35 - 680 kPa. Ring offers a range of tyre inflators to suit all vehicles which you can see below. Repeat for the other tyres. We also expected an accurate, clearly legible gauge. Sign up to keep up-to-date on everything happening in the world of Halfords. Thanks to its internal battery, allowing fully cordless operation, this is the most convenient-to-use compressor on test. Halfords Tyre Inflator Digital Electric 12V 120PSI Backlit Display. £3.10 postage. Unavoidably a single volume cannot be exhaustive. but the present book contains a sufficient number of important real-time applications. The book is divided in two sections. Handbook of Structural Life Assessment will be an essential guide for aerospace structures designers and maintenance engineers, pipeline engineers, ship designers and builders, researchers in civil, mechanical, naval, and aerospace ... Motorcycle Battery Chargers & Accessories, Halfords Digital Tyre Pressure/Tread Gauge, Michelin Programmable Superfast 4X4/SUV Digital Tyre Inflator, Halfords Essentials Analogue Tread Depth Gauge, Halfords Essentials Metal Barrel Foot Pump and Gauge, Michelin Tyre Pressure Gauge with Keyring, Halfords Tyre Valve Dust Caps Green (HFX669), Halfords Essentials Analogue Pressure Gauge, Halfords LED Digital Tyre Pressure Gauge 2015. Michelin Tyre Pressure Gauge with Keyring Michelin Tyre Pressure Gauge with Keyring is pocket sized and ideal for keeping in the car glove box. This tyre pressure level gauge includes a calculation spectrum of 0 to 60 PSI. There are three main types of tire pressure gauge: pencil (also called stick or rod gauges), mechanical dial, and digital. Ensuring your tyre pressure is right before setting off on your journey will save you time, fuel and money. Calibrate your tire air gauge with these quick and easy steps that can make a big difference to the bottom line. This dependable book covers allavenues of buying and owning a car, from negotiating a fair priceto finding reliable insurance to saving money on routine servicing.You'll stay in the driver& ’s seat as you discoverhow to: * Calculate how ... Automatic on/off operation. This study measures wartime claims against actual results of the British bombing campaign against Germany in the Great War. There’s an LED light and we liked the straight, shrouded chuck which made getting a seal on the valve easy. Please note your e-Voucher can take up to 7 days to be sent to you. 0000020945 00000 n This is the only complete source that covers the purification of laboratory chemicals that are commercially available in this manner and format. * Complete update of this valuable, well-known reference * Provides purification procedures of ... £21.99. Please select a variation to see the final price. 0000011340 00000 n Don't leave it to chance, get it spot on before you've even left home with our tried and tested digital pressure gauges. {QG�i��}�q����(�0����o��…�ę OV�.q�Z�� !�+�:?x�=m�3 Tyre Gauges. 9. The lack of a power cord is just one advantage. %%EOF Learn more about the range by visiting the Michelin Brand Page. Tyre Pressure Gauge with Flexible Hose. 0000210871 00000 n Always check the tyre pressure with a tyre pressure gauge when your tyres are cold. The heavy-duty construction will easily withstand shifting around in your glove compartment or . Halfords stock a large selection of tyre pressure gauges. Add to trolley. It is a heavy-duty gauge with a long 10″ flexible hose. 0000046252 00000 n Shop All Tyre Care. Michelin Programmable Digital Tyre Pressure Gauge Extra Info. 0000052218 00000 n Halfords Digital Tyre Pressure / Tread Gauge Extra Info. 0000007995 00000 n Tire Pressure Gauge - (0-60 PSI) Heavy Duty, Certified ANSI Accurate with Large 2 Inch Easy to Read Glow Dial, Low - High Air Pressure Gauge. Found inside – Page 1434p Halfords Footpump . Taptite Connector.38 p HOMELOCK Jetspray . Chrome leather palm / cotton In attractive finish . As illustrated . Renshaw Tyre Pressure Gauge . HALFORDS TOOL VALUE - HALFORDS VALUE backed gardening gloves . The long answer is a little more involved. Tim Watson is joined by co-editor Ethne Nussbaum and both bring years of clinical, research and teaching experience to the new edition, with a host of new contributors, all leaders in their specialty. £3.00. 0000008021 00000 n 0000003271 00000 n 0000216147 00000 n CMH Pub. 93-10. 1st printing. Find many great new & used options and get the best deals for 171805 Halfords LED Digital Tyre Pressure Gauge 2015 at the best online prices at eBay! Filling tire pressure is a pretty simple process. Easy to read large backlit display with a bright LED light ideal for night use. Halfords Digital Tyre Pressure/Tread Gauge The Halfords Digital Pressure/Tread Gauge is a handy gadget, which enables you to check your car tyre pressure and tread depth accurately and quickly. 0000003128 00000 n Pressure should be checked only when the tyre is cold, since there is an increase in pressure when the tyre has warmed up after being run. Pinterest. Found inside – Page 11TESTED FIRST PICTURES EFICIAL The right pressure in your car tyre will prolong its life . ... the Sports Coupe A sporty Evolution trim Greg Kable 40 Make Halfords Name Mini Digital Tyre Pressure Gauge Range 5-60psi Cost ... You'll find out how often you should be checking your car tire pressure and when. [10012] 20oz TPMS Tire Sealant for Trucks and SUV's. [10113] 18oz TPMS Tire Sealant for Auto and Trailer. 0000211432 00000 n 4.5 out of 5 stars. 0000003365 00000 n 4.6 out of 5 stars 6,196. Found inside – Page 564... Automark JUMBO PRINTS 5 ft x 2ft 9 with precision gauges AUTOMARK TYRE PRESSURE GAUGE A world best seller . ... 0d From Leading Stockists and all Branches of Halfords AUTOMARK TYRE TREAD DEPTH GAUGE Accuracy no vernier gauge can ... Stock No: 69924 Part No: TPG100A View more. Double D Ring. (12) 12 product ratings - Halfords RCP-B190 12V Electric Rapid Tyre Inflator Free Fast Postage. How to read tyre pressure gauge.Traditional pencil and dial tyre pressure gauges do not require a battery and can be used at any time in any condition, whilst digital tyre pressure gauges are designed for ease of use with. It is ergonomically designed with an angled head and a rubber coated easy-grip handle. 0000043787 00000 n 9. Finally, if you are using your vehicle to carry additional load or weight, always consult your vehicle handbook for the correct loaded tyre pressure. Features & Benefits: Easy to read, large display. First, there's the pencil gauge, which is about the size of, well, a pencil. 0000013252 00000 n 159 views today. 0000000016 00000 n Best all-round inflator: Michelin 12266 . Key features of the Guide: An official publication of the Association for Behavioral and Cognitive Therapies Describes empirically-based assessment across the lifespan Provides in-depth reviews of nearly 100 measures, their administration ... 0000046543 00000 n £2.90. This tire pressure gauge is able to read air pressure from 5-150 PSI in 0.5 increments and is said to be accurate within 0.05 PSI. Halfords Advanced Digital Tyre Pressure Gauge Price: £21.99 Contact: 0845 762 6625, www.halfords.com 0000016118 00000 n Contributors to this volume use four hundred years of Dutch history as laboratory to contribute to spatialized understanding of the history of knowledge. Michelin Programmable Digital Tyre Pressure Gauge 12295, £24.99 from Halfords - buy here Michelin's fancy looking . Back. 0000005749 00000 n Silverline Digital Tyre Pressure Gauge 282526 review. The Draper 69924 Tyre Pressure Gauge with Flexible Hose is perfect for those who need a flexible tyre pressure gauge for such circumstances. By ensuring that your vehicle's tyres are inflated to their recommended tyre pressure levels, you could: • Extend the life of your tyres • Improve your vehicle safety • Maintain fuel efficiency Disclaimer: Based on data provided by HaynesPro. 0000002364 00000 n Tyre Pressure Monitors. Can be programmed with front and rear tyre pressures for up to two cars. The pressure gauge had four scales and was accurate. 0000212458 00000 n The Accutire MS-4021B digital tire pressure gauge features a large, easy to read LCD display that provides pressure readings from 5-150 PSI in 0.5-pound increments. Tire pressure gauge features. The Halfords Programmable Tyre Pressure Gauge has an easy to read, back-lit display and a LED light for night time use. Found inside – Page 12PAGE 12 DAILY MIRROR , Thursday , July 10 , 1975 YOUR BIG VALUE MOTORING STORE HALFORDS OVER 385 BRANCHES throughout the country ... 1.95 Renshaw Tyre Pressure Gauge . ... FREE * Saveturtier Music on the move Manual Tuning Car Radio . Found insidePrimary modificaproduction Macchi MB.326 primary trainers for the Italian Air tions were the insertion of ... On April 30 the West German Federation of Aviation gauge skin in the higher - stressed portions of the pressure cabin . Newer car models have a built-in tire pressure gauge known as the Tire Pressure Monitoring System (TPMS) that additionally alerts the driver if their tires are under or over-inflated. 0000214218 00000 n Maintaining the proper tire pressure prevent. 0000031764 00000 n Halfords claims that the inflator can pump an R13 tyre (13 inches in diameter) from flat to 30psi in three minutes, thanks to a flow rate of between 28 and 30 litres per minute. It is also equipped with an auto shut-off feature to save on . Two of these are specifically aimed at the motorcycle market and cost between £10 and £22. This is a cracking new gauge from Halfords and we love the . -Push end of gauge firmly into tyre valve until pointer reaches highest point. In terms of the tyre pressure for a Fabia it seems that the minimum pressure is 30 psi for the front wheels and 30 psi for the rear wheels. About the Vauxhall Astra Vauxhall Astra is a family class car model manufactured by […] 0000024027 00000 n trailer 0000213374 00000 n -In order to prevent fatigue. Fuses Electricals Halfords Digital Tyre Pressure Gauge Portable Vehicle Air Compressors & Inflators, Halfords Digital Tyre Pressure Gauge Silver Vehicle Air Compressors & Inflators, Halfords Pressure Gauge Vehicle Air Compressors & Inflators, Foot Pump Vehicle Air Compressors & Inflators, Foot Pump Manual Vehicle Air Compressors & Inflators, Large easy-to-read scale graduated 5-100psi in increments of two psi and 0.5-6bar i. more. 440 sold. 4.5 / 5. Price: Around £20. 0000216108 00000 n This dial can be interpreted effortlessly at virtually any slant. The Digital Pressure and Tread Gauge allows you to quickly check the pressure and act accordingly. SPONSORED. 0000017359 00000 n Buy AXABING Double Cylinder Portable Foot Pump Air Tyre Inflator with Pressure Gauge for Car Tyres, Bicycle Tyres, Bike Tyres, Motorcycle Tyres, Balls, Air Mattress, Kayaking and Other Inflatables at Amazon UK. Found inside – Page 53BMW owners handbook for sale or will swop for car brochures handbook for 316 318 320 320i date of issue 11/12/75 . ... tyres plus one damaged but useable spare £ 30 , 7ft whip car aerial £ 2.50 unused , oil pressure gauge £ 1.50 . Accuracy: +/- 1% + 1 LSD. Getting your tyre pressure right can help you not only save fuel and money, but also prevent hazardous punctures or blow outs. Today. Michelin's dual tyre pressure gauge can be prgrammed for two vehicles. Big 2 inch high contrast dial offers a more clear-cut exact screen plus 360 degrees pivot chuck. Compare. We offer a full range of digital pressure gauges and tyre inflators to suit all budgets, from our own great value range through to top spec Michelin kits. tyre inflator car tyre air pump for all cars electric car air pump electric air compressor. Touch device users can explore by touch or with swipe gestures. Get it as soon as Tue, Oct 19. Found inside – Page 6027 - Pirani pressure gauge ( Edwards , model G6B ) 28 - oil differential pressure gauge 29 mercury pressure gauge 30 - metal ... An optical diagram of the spectrometer , taken from the instruction manual , is presented in figure 2.10 . �12����K�3��u����*�I �n�jo�����&!�L~E*�Jf�:D�Y�Ո�A�N�EM3��;I8��=�jSUI}��(DA:�(� Michelin Programmable Rapid 4X4/SUV Tyre Inflator. 159 views today. We use a stick type pressure gauge, a dial pressure . startxref A portable car tyre pump can provide the ideal solution to your tyre maintenance needs. 0000006826 00000 n This will be the cold tyre pressure. Since maintaining your tires is so important to your safety and your car's overall performance, it's important to know what tire pressure is right for your vehicle. Free delivery on eligible orders. 4.4 out of 5 stars. If your tyre needs extra air, you should inflate it using an air pump at home, or use the facilities provided in many petrol stations. Prices range from $5 for a basic gauge to more than $30 for one that is digital, has an air-release button — or . $12.72 $ 12. 4.5 out of 5 stars. These are the first international evidence-based guidelines on the core components of IPC programmes. Hand & Foot Pumps. 12V Tyre Inflators. %PDF-1.4 %���� His account is the story of the early history of aviation, the development of aircraft and the personalities that led the way in those exciting, if risk-strewn days of yore. Removable Liner (Washable) 0000046867 00000 n Use the table below to find the tyre pressure for you Astra. 0000033997 00000 n For efficiency, we pumped a 225/70 15 tyre 20 times from a start figure of 25psi and checked the final pressure, logging the gauge readings at . There are four pressure measurements you'll see on tire gauges. 0000212161 00000 n 0000006107 00000 n 0000031613 00000 n Tyre air pump Product name Tyre air pump Sampling time 3 working days-tyre air pump Model CPA005 Voltage dc 12v Current 35A Pressure 150PSI Flow rate 150L/M Power 420w Weight 6kg Cylinder 2*dia40mm Fittings: 1.05m rubber air hose+2.8m power c. This item: Halfords Digital Tyre Pressure Gauge. If tyres are over-inflated, you can let air out of them. (611) £40.00. LS2 OF601 Bob Carbon 505270. Halfords claims that the inflator can pump an R13 tyre (13 inches in diameter) from flat to 30psi in three minutes, thanks to a flow rate of between 28 and 30 litres per minute. 0000002601 00000 n It is a heavy-duty gauge with a long 10″ flexible hose. The best one, at £22, is the dial-type Halfords Tyre Gauge Pro 0-60 psi. £18.00. 72 $14.97 $14.97. Halfords Programmable Digital Tyre Pressure Gauge. 0 -Refer to owners manual for ideal tyre pressure for specific road conditions. This is a video on how to check your car's tire pressure using three different types of pressure gauges.