In electroplating, bath temperature has a direct effect on deposit quality: brightness, adhesion, internal stress, thickness and plating rate. A deviation of just a few degrees is enough to produce a dull, burnt or brittle deposit and to speed up the breakdown of additives. Choosing the right temperature probe, positioning it correctly and pairing it with reliable control is therefore a direct lever for quality and profitability on any surface treatment line.<\/p>\n
This guide reviews the specific constraints of electrolytic baths and good practice for measuring and controlling their temperature, from gold plating workshops in the watch industry to industrial chrome plating lines.<\/p>\n
Every electrolyte is formulated to work within a specific temperature range. Outside that range, the bath behaves differently:<\/p>\n
As a guide, here are some common operating ranges. They always depend on the formulation: your chemical supplier's technical data sheet is the reference.<\/p>\n
In most cases, stability of \u00b11 to \u00b12 \u00b0C around the setpoint is a good target. Precious metal baths, which are sensitive and costly, deserve even tighter control.<\/p>\n
An electroplating probe works in far harsher conditions than a standard process probe. Three constraints guide the choice.<\/p>\n
Baths are acidic, alkaline or cyanide-based, sometimes loaded with chlorides or fluorides. A 316L stainless steel sheath suits many alkaline or neutral baths, but it is attacked by strong acids and chloride media. It can then corrode and contaminate the bath with iron, chromium or nickel. For these media, choose:<\/p>\n
A plastic coating slows the probe's response time. This is generally not a problem: a bath of several hundred litres has high thermal inertia.<\/p>\n
Rectifier current flows through the bath, and neighbouring tanks can create stray currents. A poorly isolated probe can make the reading drift, disturb the PLC or create a ground loop. Good practice:<\/p>\n
Acid fumes, splashes, condensation and frequent cleaning call for a sealed probe head, a resistant cable (silicone, PTFE or PVC depending on the medium) and protected connectors, for example M12 IP67.<\/p>\n
For bath control, the PT100 is the reference choice: accurate, stable over time and perfectly suited to the 15 to 90 \u00b0C ranges found in electroplating. Ideally it is wired in 3 or 4-wire, or through a 4-20 mA transmitter when the PLC is far away.<\/p>\n
A thermocouple offers no advantage at these temperatures and is less accurate. An NTC can be enough on small equipment, but its range and interchangeability are more limited. Discover the different types in our range of industrial temperature probes<\/a>.<\/p>\n On large tanks or stratified baths, a second probe makes it possible to check temperature uniformity.<\/p>\n The probe sends its reading to a PID temperature controller<\/a> or to the line's PLC, which drives the heating (electric immersion heaters, steam or hot water) and, if needed, the cooling. A well-tuned PID controller avoids overshoot and keeps the bath stable despite cold loads coming in.<\/p>\n Safety deserves as much attention as control. An immersion heater running outside the liquid, after a leak or a drop in level, can damage a plastic tank and start a fire. Make sure you have:<\/p>\n Customers, particularly in watchmaking, medical devices and aerospace, increasingly ask for proof that each batch was processed under the specified conditions. Continuous recording of each bath's temperature meets this requirement and makes analysis easier when a defect occurs.<\/p>\n A probe drifts over time, especially in an aggressive medium. Check it periodically, for example once a year, with a reference thermometer or a temperature calibrator<\/a>, and replace it as soon as the sheath shows signs of attack.<\/p>\n Tank depth, mounting on the rim, sheath material, cable length, connector: an electroplating probe is rarely standard. DYNATIME, a Swiss distributor based in Marin (NE), has been working with manufacturers in the Jura Arc and across Switzerland for more than 30 years. Together with you, we define the right probe, transmitter and controller for each bath.<\/p>\n Describe your requirement with our custom temperature probe configurator<\/a>, or Get in touch<\/a> for technical advice.<\/p>\n Yes, in many alkaline or neutral baths. In acid, chloride or fluoride baths, stainless steel corrodes and contaminates the bath: a PTFE, PFA or titanium sheath is then preferable, with titanium ruled out when fluorides are present.<\/p>\n Stability of \u00b11 to \u00b12 \u00b0C around the setpoint is suitable for most baths. A class A PT100 combined with a PID controller achieves this easily.<\/p>\n It is strongly recommended. An independent probe connected to a limiter cuts the heating if the control fails or the level drops, protecting both the tank and the workshop.<\/p>","protected":false},"excerpt":{"rendered":" Chemical resistance, electrical isolation, position in the tank, control and safety: how to choose and install a temperature probe for your electroplating baths.<\/p>","protected":false},"author":1,"featured_media":25904,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[87],"tags":[],"class_list":["post-25901","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-produits"],"acf":[],"_links":{"self":[{"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/posts\/25901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/comments?post=25901"}],"version-history":[{"count":1,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/posts\/25901\/revisions"}],"predecessor-version":[{"id":25902,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/posts\/25901\/revisions\/25902"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/media\/25904"}],"wp:attachment":[{"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/media?parent=25901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/categories?post=25901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dynatime.ch\/en\/wp-json\/wp\/v2\/tags?post=25901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Where should the probe go in the tank?<\/h2>\n
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Controlling and safeguarding temperature<\/h2>\n
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Traceability and calibration<\/h2>\n
A custom probe for every tank<\/h2>\n
Frequently asked questions<\/h2>\n
Can a stainless steel probe be used in an electroplating bath?<\/h3>\n
What accuracy should you aim for in bath temperature?<\/h3>\n
Is a safety probe needed in addition to the control probe?<\/h3>\n