Calibration & Repair Services
A NIST-traceable calibration laboratory in Bakersfield covering 8 disciplines. Oil & gas, manufacturing, agriculture, food processing, medical, pharmaceutical, defense, aerospace, power generation, water treatment. Wherever process instrumentation runs, we sell it, calibrate it, and repair it. Since 1971, with custom thermocouple & RTD manufacturing in-house.
Electrical Calibration
Process meters and multimeters through 15 kV insulation and transformer test
The electrical bench covers the instruments process industries actually run: the loop calibrators and process meters that live in I&E techs' bags, the multimeters and clamps on every cart, and the high-voltage test sets behind substation and motor-shop work. Every calibration is performed against NIST-traceable standards; as-found / as-left documentation is available on request.
What We Calibrate
- Process meters & loop calibratorsFluke 789, 787 · Martel LC-110 · PIE 422
- Multimeters: digital & analogFluke 87V, 179, 289 · Amprobe HD160C · Simpson 260
- Clamp meters: AC/DC, milliamp process, leakageFluke 376, 381, 771 · AEMC CL601 · Amprobe ACDC-3000
- Insulation testers / meggers to 15 kVMegger MIT1525, MIT520, MIT410 · Fluke 1507, 1587 · AEMC 6527
- Documenting & multifunction calibratorsFluke 725, 744 · Martel PTC-8001
- Transformer turns-ratio test setsMegger TTR20 · Biddle TTR-series
- Microhmmeters & winding-resistanceMegger MOM2 · Vanguard Auto-Ohm 200
- High-voltage detectors & tic tracersAEMC 275HVD · Amprobe TIC 300 Pro
Pressure Calibration
Test gauges, calibrators, modules, and the analog gauge fleet, all sizes and ranges
Pressure is the busiest bench in the building. Digital test gauges and calibrators, the Fluke pressure-module ecosystem, transmitters, manometers, and a steady stream of analog gauges from oilfield and plant service. Vacuum through high pressure, every unit is calibrated against NIST-traceable standards.
What We Calibrate
- Digital test gauges & calibratorsCrystal XP2i, IS33, HPC40/50 · Fluke 700G · Additel 681 · Martel BetaGauge 330 · Heise PTE-1
- Pressure modulesFluke 700P-series
- Analog & liquid-filled gauges: all sizes & rangesAshcroft · Wika · US Gauge SOLFRUNT
- Digital & differential manometersMeriam ZM100, DP2000I · Dwyer 475, 477
- Pressure & temperature transmittersRosemount 2051T, 3095, 3144P
Every pressure line we sell, we also calibrate: Crystal, Additel, Fluke and beyond.
Temperature Calibration
Dry-wells and baths, reference thermometers, simulators, plus sensors we build in-house
From the dry-well calibrators that anchor field temperature work to the reference thermometers behind custody-transfer gauging, the temperature bench runs deep. We also manufacture custom thermocouples, RTDs, and thermowell assemblies in-house. The people calibrating your sensor are the same people who could have built it.
What We Calibrate
- Dry-well calibrators & bathsAmetek Jofra ETC-400, CTC-650, RTC-158 · Additel 878
- Reference & petroleum-gauging thermometersThermoProbe TL1 · Martel BetaProbe TI · Crystal RTD100
- TC / RTD simulators & calibratorsMartel PTC-8010 · Altek 322, 334 · PIE 334
- Thermocouples & RTDsour own custom-built, made to order
- Digital & IR thermometersFluke 51-II, 62 MAX · Extech 42510A, TM20
Dimensional Calibration
Micrometers, calipers, indicators, and ultrasonic thickness
Machine-shop and QC metrology: micrometers, calipers, indicators, and the layout tools behind them, plus ultrasonic thickness gauges for inspection programs. Calibrations reference NIST-traceable gauge standards.
What We Calibrate
- Micrometers: outside, inside, depthStarrett 436 · Fowler 52-series
- Calipers: digital, dial, vernierMitutoyo 500-series · Starrett 120A
- Indicators: dial & dropMitutoyo 2046S · Starrett 25-series
- Squares, levels & rulesStarrett 98-series machinist levels
- Ultrasonic thickness gaugesOlympus Epoch 650, D790 · GE Panametrics MG2-XT, DM5E
Mass & Force Calibration
Scales, balances, and test weights
Bench, floor, and precision weighing, calibrated on site or on the bench with NIST-traceable test weights.
What We Calibrate
- Scales & balances: bench, floor, precisionOHAUS Scout Pro, Adventurer AX · Sartorius Practum
- Test weightsASTM Class 1–7
Torque Calibration
Hand tools through hydraulic wrenches and multipliers, up to 10,000 ft·lb
Torque is a fleet business: most shops send the whole drawer at once. Click wrenches from inch-ounce screwdriver ranges up through 1" drive, checked at the standard test points; as-found / as-left readings available on request. New in 2026, a hydraulic torque bench extends the range to 10,000 ft·lb on a 1.5" drive, bringing hydraulic torque wrenches and manual multipliers onto the same calibration floor. These are the high-capacity tools behind flange make-up, wellhead, and turnaround bolting.
What We Calibrate
- Micrometer-adjustable click wrenchesCDI 2503, 6004 · Snap-on QD-series · Wright 3477 · Proto 6014 · Armstrong 64-series
- Dial & digital torque wrenchesSnap-on TECH-series
- Torque screwdriversCDI 401SM · Klein 57032
- Hydraulic torque wrenches & manual multipliersto 10,000 ft·lb / 1.5" drive
Capacity to 10,000 ft·lb / 1.5" drive, from hand tools to hydraulic wrenches and multipliers.
Gas Detection & Safety
Gas monitor calibration plus dielectric testing of hot sticks and grounds
Two benches in one discipline. On the gas side, portable monitors are calibrated per channel with certified gas. In the high-voltage safety shop, hot sticks and protective grounds get the dielectric and resistance testing utility work depends on. We also supply the calibration gas itself.
What We Calibrate
- Single & multi-gas monitors, calibrated per channelRKI Eagle & GX-series · BW GasAlert MicroClip, Quattro
- Confined-space & area monitorsRKI GX-2009 · RAE QRAE II
- Hot sticks: OSHA 29 CFR 1910 dielectric testing to 100 kVHastings · Salisbury · Chance
- Protective grounds & jumpers: ASTM F2249, any class or lengthSalisbury 4244-series
Water Quality Calibration
Multiparameter and handheld water-quality meters
pH, ORP, conductivity, resistivity, and TDS instruments: the meters behind boiler, cooling-tower, and ag-water programs, calibrated against certified reference solutions.
What We Calibrate
- Multiparameter meters: pH · ORP · conductivity · TDSMyron L Ultrameter II 6P, 4P
- Handheld meters & pensOakton Con 11, Temp-360
Repair & Depot Service
Calibration finds the problem; repair fixes it. A drifting or dead instrument doesn't have to mean a new purchase. Our bench repairs what we sell, then recalibrates it against NIST-traceable standards before it ships back. One turnaround instead of two vendors and two lead times.
Megger Authorized Service Center
Valley is a Megger Authorized Service Center: factory-backed repair and NIST-traceable calibration for Megger insulation testers, transformer turns-ratio sets, ground testers, and the rest of the Megger electrical-test line.
Read the announcementIf We Sell It, We Repair It
More than 50 years on the bench means most of what leaves our shop can come back for service instead of replacement: sensor and battery replacement, module and seal service, mechanism rebuilds, board-level repair where the parts exist, always followed by full recalibration.
- Gas monitors: sensor & pump replacement, per-channel recalibration
- Pressure gauges & calibrators: module, seal & sensor service
- Process meters & loop calibrators: jack, battery & firmware
- Scales & balances: load cell, indicator & leveling repair
- Torque wrenches: mechanism rebuild & click-point reset
- Temperature calibrators & probes: well & sensor service
Not sure if yours is repairable? Send us the model. If it can be fixed economically, we'll tell you; if it can't, we'll tell you that too.
Custom Thermocouple & RTD Manufacturing
Temperature sensors built to your exact specifications, in-house: thermocouples, RTDs, and thermowell assemblies, from standard configurations to one-of-a-kind designs.
Request a Custom QuoteNeed Calibration or Repair Service?
Give us a call or send us a message. We'll get your instruments back to spec, fast.