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Resources for pressure and temperature instrument buyers.

Find technical blog articles, downloadable PDF guides, and brochure-style product entrances for pressure gauges, thermometers, transmitters, diaphragm seals, and application-specific instruments.

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11PDF Guides

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HVAC technician connecting a manifold gauge set with compound dials to an air conditioning condensing unit

Technical article2026-08-25

Vacuum Pressure Gauge Selection: Compound Ranges and Limits

Vacuum pressure gauge selection: gauge, vacuum, compound and absolute references, the right sensing element per vacuum level, and where a dial stops working.

Blog Articles

Pressure gauge mounted on a hydraulic power unit manifold, dial graduated 0 to 250 bar

Technical article2026-08-25

Pressure Gauge Accuracy Class Selection: 4 Key Variables

Pressure gauge accuracy class selection: what EN 837-1 classes permit, how span and working point change the real error, and which class each duty needs.

Engineer verifying pressure gauges on a comparator bench in the Manogauge calibration laboratory

Technical article2026-08-18

How to Calculate Pressure Gauge Range: 75% Rule and Examples

Calculate pressure gauge range step by step: divide maximum pressure by 0.75 or 0.65, round up to a standard range, then check the working point and accuracy.

Schematic of a chiller refrigerant loop showing high-side and low-side pressure gauge points at the compressor, condenser, expansion valve and evaporator

Technical article2026-07-28

Chiller Refrigerant High & Low Pressure Gauges: Selection Guide

Pick chiller refrigerant high pressure gauges and low-side compound gauges for R-134a, R-410A, R-407C and CO2: ranges, tube materials, connections and an RFQ checklist.

Pressure gauge assembly and inspection hall at the Manogauge factory

Technical article2026-07-23

Pressure Gauge Factory Acceptance Test Checklist

Pressure gauge factory acceptance test checklist: inspection points, calibration evidence, leak checks, materials and the documents to demand before shipment.

Compressor room with air receiver tank, dryer and filtration pipework

Technical article2026-07-22

Compressed Air Pressure Gauge Selection Guide (bar & psi)

Pick compressed air pressure gauges from compressor room to point of use: bar/psi range, accuracy class, filter pressure drop, moisture, and an RFQ checklist.

Flanged diaphragm seal pressure gauge on a pulp stock line at a paper mill pump

Technical article2026-07-20

Paper Mill Pressure Gauge: When You Need a Diaphragm Seal

Pressure gauges for pulp stock, white water, steam and coating lines: where fibre plugs the socket, when a diaphragm seal is needed, range and materials.

District heating substation with plate heat exchangers, pumps and insulated pipework

Technical article2026-07-19

District Heating Pressure Gauge: How to Pick Range and Temp

Pressure gauges for a district heating substation: primary vs secondary loop ranges, strainer DP points, hot-water temperature limits and siphon checks.

Fire pump room with red fire pumps, riser piping and alarm valve assembly

Technical article2026-07-18

Fire Sprinkler Pressure Gauge Requirements: UL 393, NFPA 25

Fire sprinkler pressure gauge requirements: why NFPA 13 wants a UL 393 listed or FM Approved gauge, how to pick range, and NFPA 25 replacement rules.

High-pressure gauges on a CO2 transcritical refrigeration rack with labelled high-pressure and suction lines

Technical article2026-07-17

CO2 Transcritical Pressure Gauge Selection

CO2 transcritical refrigeration pressure gauge selection for R744 racks: high-side pressure, flash tank and suction points, materials and safety cases.

High pressure process pipework where solid front safety case gauges are required

Technical article2026-07-13

Solid-Front Pressure Gauge Safety Case Selection

Solid front pressure gauge selection for high pressure, gas and steam service: safety case design, blow-out back, ASME B40.100 and EN 837-1 S3 patterns.

Chilled water DP monitoring with pressure gauges and differential pressure transmitter in an HVAC plant

Technical article2026-07-12

Chilled Water DP Monitoring Guide

Chilled water DP monitoring for HVAC plants: where to place gauges and DP transmitters, how to size the range, and what the readings cannot prove.

Liquid-filled pressure gauge mounted on a pigtail siphon on an insulated steam line

Technical article2026-07-11

Steam Gauge Siphon: Pigtail vs U-Type and How to Install

Why a steam pressure gauge needs a siphon: how the condensate barrier protects the Bourdon tube, pigtail vs coil vs U-type, filling and range checks.

Technical article2026-07-10

Nitrogen Blanketing Pressure Gauge Selection

Nitrogen blanketing pressure gauge selection for low-pressure storage tanks: range, capsule gauges, regulators, vents, oxygen-deficiency risk and RFQ checks.

Safety relief valve installed on a process vessel with stainless steel pipework

Technical article2026-07-09

Pressure Relief Valve Gauge Selection: Range and Placement

Size a relief valve pressure gauge around operating and set pressure, choose where the gauge belongs, and check backpressure, rupture discs and vibration.

Diaphragm seal pressure gauge at the metering pump discharge of a chemical dosing skid

Technical article2026-07-08

Chemical Dosing Skid Pressure Gauge Selection Checklist

Dosing skid gauge selection: set range from pump shutoff and relief pressure, pick wetted materials and diaphragm seals, handle pulsation and clogging risk.

Oxygen pressure gauge on a clean oxygen manifold with no oil handling controls

Technical article2026-07-06

Oxygen Pressure Gauge Selection Guide

Oxygen pressure gauge selection guide for clean service: oil-free handling, materials, range, dry case choice, packaging, installation and RFQ checks.

Bimetal dial thermometer inserted in a thermowell on a flanged stainless steel pipe

Technical article2026-07-05

Bimetal Thermometer Thermowell Selection Guide

Bimetal thermometer and thermowell selection for steam, hot water and thermal oil: insertion length, material, wake frequency risk and connection choice.

Biogas plant with digester domes and gas upgrading pipework

Technical article2026-07-04

Biogas Pressure Gauge: H2S Corrosion, Condensate and Range

Biogas and biomethane pressure gauge selection for digesters, blowers and upgrading skids: low pressure range, H2S corrosion, condensate traps and materials.

Differential pressure gauge piped across the inlet and outlet of an industrial filter housing

Technical article2026-07-03

Filter Differential Pressure Gauge: Range, Alarm, Changeout

Choose a filter differential pressure gauge from clean DP, changeout DP and flow: DP span, alarm setting, port layout, wetted materials and cleaning limits.

Industrial pump and process pipework where overpressure protection is required

Technical article2026-07-02

Pressure Gauge Overpressure Protection Guide

Pressure gauge overpressure protection guide for pumps, water hammer, pulsation, snubbers, pressure limiters, safety cases and RFQ checks.

Real dual-scale pressure gauge dial with bar and psi markings for EN 837-1 procurement review

Technical article2026-07-01

EN 837-1 Pressure Gauge Standard: Accuracy Class and RFQ Guide

EN 837-1 explained for buyers: accuracy class, S1/S2/S3 safety pattern, range rules and ASME B40.100 comparison — plus the evidence to request before you place the order.

Cooling tower with circulating water pumps and filtration pipework

Technical article2026-06-30

Cooling Tower Pressure Gauge Monitoring Guide

Cooling tower pressure gauge monitoring for condenser water loops: gauge points, strainer DP, side-stream filters, materials and range selection.

Sanitary pressure gauge with clamp diaphragm seal on a clean steam SIP line in a pharmaceutical plant

Technical article2026-06-28

Clean Steam Pressure Gauge for Pharma SIP

Clean steam pressure gauge selection for pharmaceutical SIP: wetted materials, sanitary connections, calibration, monitoring points and RFQ checklist.

Supplier audit desk with inspection records and sample pressure gauges

Technical article2026-06-27

Pressure Gauge Supplier Audit Checklist

Pressure gauge supplier audit checklist: ISO 9001 scope, EN 837 and ASME B40.100 compliance, calibration traceability, sample testing and material certs.

Hydraulic power unit circuit with pressure measuring points

Technical article2026-06-25

Hydraulic Pressure Gauge Selection Guide

Hydraulic pressure gauge selection for presses, power units and manifolds: 0-600 bar ranges, glycerine fill vs snubbers, SAE/BSP/NPT ports and fluid checks.

Centrifugal pump pressure gauge selection with suction and discharge gauges on a pump skid

Technical article2026-06-24

Centrifugal Pump Pressure Gauge Selection Guide

Centrifugal pump pressure gauge selection for suction and discharge: range sizing from shutoff head, vibration protection, liquid fill vs snubber, materials.

Industrial heat pump plant room with plate heat exchangers and compressor skid

Technical article2026-06-21

Industrial Heat Pump Pressure Monitoring Guide

Industrial heat pump pressure monitoring for retrofits: gauge and transmitter selection, range, materials, installation points and commissioning checks.

Pressure gauge snubber on pump discharge piping for pulsation protection

Technical article2026-06-20

Pressure Gauge Snubber & Pulsation Protection

Pressure gauge snubbers for pulsation on pumps, compressors and hydraulics: orifice, sintered and piston types, bore sizing and fluid compatibility.

Stainless steel pressure gauge on an ammonia refrigeration compressor valve station in a machinery room

Technical article2026-06-16

Ammonia Refrigeration Pressure Gauge: R717 Materials and Safety

Ammonia refrigeration pressure gauge guide for R717 cold storage: suction, discharge, oil, defrost ranges, material compatibility and safety checks.

Schematic showing pressure gauge dial size against operator reading distance

Technical article2026-06-16

Pressure Gauge Dial Size Selection Guide: When to Use 40, 63, 100 or 150 mm

Use this pressure gauge dial size selection guide to match reading distance, panel space, vibration and accuracy class. Compare 40, 63, 100 and 150 mm.

Diagram comparing a local mechanical pressure gauge with a 4-20 mA transmitter loop

Technical article2026-06-15

Pressure Transmitter vs Pressure Gauge Selection

Pressure transmitter vs pressure gauge: choosing by application - local indication or 4-20 mA output, accuracy class, hazardous area, cost and maintenance.

Hydrogen electrolyser plant with stacks and stainless steel gas pipework

Technical article2026-06-10

Hydrogen Electrolyzer Pressure Monitoring: Selection Guide

Hydrogen electrolyzer pressure monitoring guide for hydrogen, oxygen and water loops: instrument type, isolation, materials, alarms and safety limits.

Red and blue refrigerant manifold gauge set with service hoses connected to an R454B heat pump unit

Technical article2026-06-06

A2L R-454B Refrigerant Pressure Gauge Selection

A2L R-454B refrigerant pressure gauge selection for HVAC service: manifold gauge use, PT chart checks, service ports, gauge range and safe workflow.

Data centre liquid cooling loop with coolant distribution pipework beside server racks

Technical article2026-06-02

Data Center Liquid Cooling Pressure Monitoring: CDU & Rack DP

Data center liquid cooling pressure monitoring: CDU supply and return points, rack manifold gauges, filter DP trending and coolant material compatibility.

Wall-mounted differential pressure gauge with two sensing ports monitoring a GMP cleanroom

Technical article2026-06-02

Cleanroom Differential Pressure: 10-15 Pa Cascade & Alarms

Cleanroom differential pressure monitoring: the 10-15 Pa cascade, airlock and HEPA points, low-range DP gauge choice, alarm limits and calibration records.

Industrial pressure gauge installation on a process pipeline with a siphon tube

Technical article2026-05-29

How to Install a Pressure Gauge: Position, Siphon, Snubber

Step-by-step pressure gauge installation: mounting position, when a siphon or snubber is needed, NPT/BSP sealing torque and EN 837-2 commissioning checks.

Sanitary pressure gauge with Tri-clamp diaphragm seal on a stainless steel process line in a food plant

Technical article2026-05-29

Sanitary Pressure Gauge for Food & Pharma

Sanitary pressure gauge selection for CIP/SIP dairy, beverage and biopharma lines: 3-A and EHEDG scope, FDA wetted materials and tri-clamp connections.

Maintenance technician inspecting instrumentation on process pipework

Technical article2026-05-29

Pressure Gauge Failure Modes: Diagnosis & Repair

Pressure gauge failure modes and troubleshooting: stuck pointer, zero drift, flutter, fogging, sluggish response and overpressure damage, with root causes.

Process plant pipework where differential pressure is measured across equipment

Technical article2026-05-29

Differential Pressure Gauge Selection: Filter and Static Guide

Differential pressure gauge selection for filters, UPW loops, pump differential and level: DP range, static pressure rating, materials and RFQ checklist.

Export compliance documents and declaration of conformity for pressure gauges

Technical article2026-05-29

Pressure Gauge Export Certifications Guide

Pressure gauge export certifications explained: CE/PED 2014/68/EU, ASME B40.100, GOST R, JIS B7505, 3-A and ATEX/IECEx scope and required documents.

Industrial standard mechanical pressure gauge for pipeline and equipment monitoring

Technical article2026-05-27

How to Select an Industrial Pressure Gauge: 8-Step Guide

Select the right industrial pressure gauge in 8 steps: range and span, wetted materials, element type, accuracy class, dial size, threads and case rating.

Clean Manogauge assembly workshop for Bourdon, diaphragm and capsule pressure gauge comparison

Technical article2026-05-11

Bourdon, Diaphragm or Capsule: Which Gauge Element to Choose

Bourdon vs diaphragm vs capsule pressure gauges: which sensing element fits clean high pressure, viscous or corrosive media, and low-pressure gas service.

Pressure gauge test and calibration benches in a manufacturing workshop

Technical article2026-05-08

Dry vs Liquid-Filled Pressure Gauges: Fill and Vibration Guide

Dry vs liquid-filled pressure gauge guide comparing glycerin, silicone oil and dry case designs for vibration, pulsation, temperature and maintenance risk.

Pressure gauge production floor where stainless steel and brass wetted parts are assembled

Technical article2026-05-08

316L vs Brass Pressure Gauge Wetted Parts: Corrosion Guide

316L vs brass pressure gauge wetted parts compared for corrosion risk in water, steam, ammonia, seawater, chlorides, CIP/SIP cleaning and diaphragm seals.

Pressure gauge bottom connection showing NPT/BSP thread for pipeline installation

Match gauges and thermometers to petrochemical, water treatment, HVAC, food, medical, machinery, and marine scenarios.

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