Machinery coolant reservoirs · direct visual liquid level
A reservoir sight column makes the coolant level visible outside the tank wall. Selection starts with the liquid-contact materials and the level interval that must be seen at the installed position.
Externally mounted tubular sight columns for direct visual reading of glycol-based coolant in machinery reservoirs, with fluid-compatible transparent tube and seals. Level gauge (4114) covers the wider magnetic and vessel glass-gauge category; Coolant tank/reservoir (4128) covers the sump itself. Pressure-vessel inspection windows, electronic level transmitters and float switches are separate products.
01
ELESA’s HCK-GL brochure specifies a Pyrex liquid-contact tube and a removable polycarbonate impact shield. Its HCK-GL-SST execution uses FKM seals; the HCK-GL seal is described simply as rubber. Confirm the seal grade for the coolant formulation. [1]
LDI’s G613 is a different construction: a rigid nylon sight tube with aluminium end blocks and Buna N seals. Its official caution explicitly excludes recommended use with ethylene glycol antifreeze and polyglycols. A visually similar oil sight gauge therefore needs its own fluid-compatibility check before substitution into a coolant tank. [2]
02
In the HCK-GL dimension table, HCK.127-GL-M12 has mounting-centre distance f = 127 mm and visible length l2 = 71 mm. Position the required level interval within that visible length, rather than treating the mounting spacing as the readable range. [1]
03
ELESA’s model page gives continuous limits of 100°C for HCK-GL and 130°C for HCK-GL-SST with oil, water or glycol solutions. Its summary illustration instead states 130°C continuous, peaks at 160°C and pressure of 5/6 bar without naming the execution. Confirm the applicable execution and pressure–temperature conditions with ELESA; retain the distinction between continuous and peak service. [1]
The model page also reports laboratory tests at 150/160°C for “many hours” with pressures of 5/6 bar. These are reported laboratory observations, separate from the model-specific continuous limits. [1]
04
ELESA+Ganter’s range guide distinguishes visual indicators from executions with a MIN-level electrical sensor, and from float-based indirect indicators. State whether the requirement is an operator’s visual check or an electrical low-level signal, then obtain a compatible execution for the coolant. The range guide is a family selector, not approval to interchange its wetted materials. [3]
Provide the coolant name, glycol type and concentration, additives, continuous and peak temperature, tank pressure, required visible interval, mounting-hole drawing, wall thickness and inspection access. Identify any required low-level contact and its electrical interface separately.
05
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Fluid: [glycol; concentration; additives] Conditions: [continuous/peak temperature; pressure] Reading: [required visible interval; access] Mounting: [hole centres; threads; wall; seals] Signal: [visual only or electrical low-level function]
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No. LDI’s G613 caution specifically advises against ethylene glycol antifreeze and polyglycols. Confirm the exact tube and seal materials for the liquid. [2]
The HCK-GL table lists them separately as f and l2. [1]
The ELESA+Ganter range guide identifies MIN-level sensor executions separately. Specify an electrical contact if the machine needs a low-level signal. [3]
Sources checked 2026-10-16. The HCK-GL brochure supplies model-specific construction and dimensions. LDI supplies a material-related exclusion for its nylon alternative; the ELESA+Ganter range guide separates visual and electrical executions.
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